Merge tag 'staging-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO updates from Greg KH:
 "Here is the big staging and IIO driver update for 4.18-rc1.

  It was delayed as I wanted to make sure the final driver deletions did
  not cause any major merge issues, and all now looks good.

  There are a lot of patches here, just over 1000. The diffstat summary
  shows the major changes here:

	1007 files changed, 16828 insertions(+), 227770 deletions(-)

  Because of this, we might be close to shrinking the overall kernel
  source code size for two releases in a row.

  There was loads of work in this release cycle, primarily:

   - tons of ks7010 driver cleanups

   - lots of mt7621 driver fixes and cleanups

   - most driver cleanups

   - wilc1000 fixes and cleanups

   - lots and lots of IIO driver cleanups and new additions

   - debugfs cleanups for all staging drivers

   - lots of other staging driver cleanups and fixes, the shortlog has
     the full details.

  but the big user-visable things here are the removal of 3 chunks of
  code:

   - ncpfs and ipx were removed on schedule, no one has cared about this
     code since it moved to staging last year, and if it needs to come
     back, it can be reverted.

   - lustre file system is removed.

     I've ranted at the lustre developers about once a year for the past
     5 years, with no real forward progress at all to clean things up
     and get the code into the "real" part of the kernel.

     Given that the lustre developers continue to work on an external
     tree and try to port those changes to the in-kernel tree every once
     in a while, this whole thing really really is not working out at
     all. So I'm deleting it so that the developers can spend the time
     working in their out-of-tree location and get things cleaned up
     properly to get merged into the tree correctly at a later date.

  Because of these file removals, you will have merge issues on some of
  these files (2 in the ipx code, 1 in the ncpfs code, and 1 in the
  atomisp driver). Just delete those files, it's a simple merge :)

  All of this has been in linux-next for a while with no reported
  problems"

* tag 'staging-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1011 commits)
  staging: ipx: delete it from the tree
  ncpfs: remove uapi .h files
  ncpfs: remove Documentation
  ncpfs: remove compat functionality
  staging: ncpfs: delete it
  staging: lustre: delete the filesystem from the tree.
  staging: vc04_services: no need to save the log debufs dentries
  staging: vc04_services: vchiq_debugfs_log_entry can be a void *
  staging: vc04_services: remove struct vchiq_debugfs_info
  staging: vc04_services: move client dbg directory into static variable
  staging: vc04_services: remove odd vchiq_debugfs_top() wrapper
  staging: vc04_services: no need to check debugfs return values
  staging: mt7621-gpio: reorder includes alphabetically
  staging: mt7621-gpio: change gc_map to don't use pointers
  staging: mt7621-gpio: use GPIOF_DIR_OUT and GPIOF_DIR_IN macros instead of custom values
  staging: mt7621-gpio: change 'to_mediatek_gpio' to make just a one line return
  staging: mt7621-gpio: dt-bindings: update documentation for #interrupt-cells property
  staging: mt7621-gpio: update #interrupt-cells for the gpio node
  staging: mt7621-gpio: dt-bindings: complete documentation for the gpio
  staging: mt7621-dts: add missing properties to gpio node
  ...

1 files changed, 0 insertions, 2804 deletions

diff --git a/drivers/staging/lustre/lustre/ptlrpc/service.c b/drivers/staging/lustre/lustre/ptlrpc/service.c
deleted file mode 100644
index f37364e00dfe..000000000000
--- a/drivers/staging/lustre/lustre/ptlrpc/service.c
+++ /dev/null
@@ -1,2804 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.gnu.org/licenses/gpl-2.0.html
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2010, 2015, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- */
-
-#define DEBUG_SUBSYSTEM S_RPC
-
-#include <obd_support.h>
-#include <obd_class.h>
-#include <lustre_net.h>
-#include <lu_object.h>
-#include <uapi/linux/lnet/lnet-types.h>
-#include "ptlrpc_internal.h"
-
-/* The following are visible and mutable through /sys/module/ptlrpc */
-int test_req_buffer_pressure;
-module_param(test_req_buffer_pressure, int, 0444);
-MODULE_PARM_DESC(test_req_buffer_pressure, "set non-zero to put pressure on request buffer pools");
-module_param(at_min, int, 0644);
-MODULE_PARM_DESC(at_min, "Adaptive timeout minimum (sec)");
-module_param(at_max, int, 0644);
-MODULE_PARM_DESC(at_max, "Adaptive timeout maximum (sec)");
-module_param(at_history, int, 0644);
-MODULE_PARM_DESC(at_history,
-		 "Adaptive timeouts remember the slowest event that took place within this period (sec)");
-module_param(at_early_margin, int, 0644);
-MODULE_PARM_DESC(at_early_margin, "How soon before an RPC deadline to send an early reply");
-module_param(at_extra, int, 0644);
-MODULE_PARM_DESC(at_extra, "How much extra time to give with each early reply");
-
-/* forward ref */
-static int ptlrpc_server_post_idle_rqbds(struct ptlrpc_service_part *svcpt);
-static void ptlrpc_server_hpreq_fini(struct ptlrpc_request *req);
-static void ptlrpc_at_remove_timed(struct ptlrpc_request *req);
-
-/** Holds a list of all PTLRPC services */
-LIST_HEAD(ptlrpc_all_services);
-/** Used to protect the \e ptlrpc_all_services list */
-struct mutex ptlrpc_all_services_mutex;
-
-static struct ptlrpc_request_buffer_desc *
-ptlrpc_alloc_rqbd(struct ptlrpc_service_part *svcpt)
-{
-	struct ptlrpc_service *svc = svcpt->scp_service;
-	struct ptlrpc_request_buffer_desc *rqbd;
-
-	rqbd = kzalloc_node(sizeof(*rqbd), GFP_NOFS,
-			    cfs_cpt_spread_node(svc->srv_cptable,
-						svcpt->scp_cpt));
-	if (!rqbd)
-		return NULL;
-
-	rqbd->rqbd_svcpt = svcpt;
-	rqbd->rqbd_refcount = 0;
-	rqbd->rqbd_cbid.cbid_fn = request_in_callback;
-	rqbd->rqbd_cbid.cbid_arg = rqbd;
-	INIT_LIST_HEAD(&rqbd->rqbd_reqs);
-	rqbd->rqbd_buffer = kvzalloc_node(svc->srv_buf_size, GFP_KERNEL,
-					  cfs_cpt_spread_node(svc->srv_cptable,
-							      svcpt->scp_cpt));
-
-	if (!rqbd->rqbd_buffer) {
-		kfree(rqbd);
-		return NULL;
-	}
-
-	spin_lock(&svcpt->scp_lock);
-	list_add(&rqbd->rqbd_list, &svcpt->scp_rqbd_idle);
-	svcpt->scp_nrqbds_total++;
-	spin_unlock(&svcpt->scp_lock);
-
-	return rqbd;
-}
-
-static void
-ptlrpc_free_rqbd(struct ptlrpc_request_buffer_desc *rqbd)
-{
-	struct ptlrpc_service_part *svcpt = rqbd->rqbd_svcpt;
-
-	LASSERT(rqbd->rqbd_refcount == 0);
-	LASSERT(list_empty(&rqbd->rqbd_reqs));
-
-	spin_lock(&svcpt->scp_lock);
-	list_del(&rqbd->rqbd_list);
-	svcpt->scp_nrqbds_total--;
-	spin_unlock(&svcpt->scp_lock);
-
-	kvfree(rqbd->rqbd_buffer);
-	kfree(rqbd);
-}
-
-static int
-ptlrpc_grow_req_bufs(struct ptlrpc_service_part *svcpt, int post)
-{
-	struct ptlrpc_service *svc = svcpt->scp_service;
-	struct ptlrpc_request_buffer_desc *rqbd;
-	int rc = 0;
-	int i;
-
-	if (svcpt->scp_rqbd_allocating)
-		goto try_post;
-
-	spin_lock(&svcpt->scp_lock);
-	/* check again with lock */
-	if (svcpt->scp_rqbd_allocating) {
-		/* NB: we might allow more than one thread in the future */
-		LASSERT(svcpt->scp_rqbd_allocating == 1);
-		spin_unlock(&svcpt->scp_lock);
-		goto try_post;
-	}
-
-	svcpt->scp_rqbd_allocating++;
-	spin_unlock(&svcpt->scp_lock);
-
-	for (i = 0; i < svc->srv_nbuf_per_group; i++) {
-		/* NB: another thread might have recycled enough rqbds, we
-		 * need to make sure it wouldn't over-allocate, see LU-1212.
-		 */
-		if (svcpt->scp_nrqbds_posted >= svc->srv_nbuf_per_group)
-			break;
-
-		rqbd = ptlrpc_alloc_rqbd(svcpt);
-
-		if (!rqbd) {
-			CERROR("%s: Can't allocate request buffer\n",
-			       svc->srv_name);
-			rc = -ENOMEM;
-			break;
-		}
-	}
-
-	spin_lock(&svcpt->scp_lock);
-
-	LASSERT(svcpt->scp_rqbd_allocating == 1);
-	svcpt->scp_rqbd_allocating--;
-
-	spin_unlock(&svcpt->scp_lock);
-
-	CDEBUG(D_RPCTRACE,
-	       "%s: allocate %d new %d-byte reqbufs (%d/%d left), rc = %d\n",
-	       svc->srv_name, i, svc->srv_buf_size, svcpt->scp_nrqbds_posted,
-	       svcpt->scp_nrqbds_total, rc);
-
- try_post:
-	if (post && rc == 0)
-		rc = ptlrpc_server_post_idle_rqbds(svcpt);
-
-	return rc;
-}
-
-struct ptlrpc_hr_partition;
-
-struct ptlrpc_hr_thread {
-	int				hrt_id;		/* thread ID */
-	spinlock_t			hrt_lock;
-	wait_queue_head_t			hrt_waitq;
-	struct list_head			hrt_queue;	/* RS queue */
-	struct ptlrpc_hr_partition	*hrt_partition;
-};
-
-struct ptlrpc_hr_partition {
-	/* # of started threads */
-	atomic_t			hrp_nstarted;
-	/* # of stopped threads */
-	atomic_t			hrp_nstopped;
-	/* cpu partition id */
-	int				hrp_cpt;
-	/* round-robin rotor for choosing thread */
-	int				hrp_rotor;
-	/* total number of threads on this partition */
-	int				hrp_nthrs;
-	/* threads table */
-	struct ptlrpc_hr_thread		*hrp_thrs;
-};
-
-#define HRT_RUNNING 0
-#define HRT_STOPPING 1
-
-struct ptlrpc_hr_service {
-	/* CPU partition table, it's just cfs_cpt_table for now */
-	struct cfs_cpt_table		*hr_cpt_table;
-	/** controller sleep waitq */
-	wait_queue_head_t			hr_waitq;
-	unsigned int			hr_stopping;
-	/** roundrobin rotor for non-affinity service */
-	unsigned int			hr_rotor;
-	/* partition data */
-	struct ptlrpc_hr_partition	**hr_partitions;
-};
-
-/** reply handling service. */
-static struct ptlrpc_hr_service		ptlrpc_hr;
-
-/**
- * Choose an hr thread to dispatch requests to.
- */
-static struct ptlrpc_hr_thread *
-ptlrpc_hr_select(struct ptlrpc_service_part *svcpt)
-{
-	struct ptlrpc_hr_partition *hrp;
-	unsigned int rotor;
-
-	if (svcpt->scp_cpt >= 0 &&
-	    svcpt->scp_service->srv_cptable == ptlrpc_hr.hr_cpt_table) {
-		/* directly match partition */
-		hrp = ptlrpc_hr.hr_partitions[svcpt->scp_cpt];
-
-	} else {
-		rotor = ptlrpc_hr.hr_rotor++;
-		rotor %= cfs_cpt_number(ptlrpc_hr.hr_cpt_table);
-
-		hrp = ptlrpc_hr.hr_partitions[rotor];
-	}
-
-	rotor = hrp->hrp_rotor++;
-	return &hrp->hrp_thrs[rotor % hrp->hrp_nthrs];
-}
-
-/**
- * Put reply state into a queue for processing because we received
- * ACK from the client
- */
-void ptlrpc_dispatch_difficult_reply(struct ptlrpc_reply_state *rs)
-{
-	struct ptlrpc_hr_thread *hrt;
-
-	LASSERT(list_empty(&rs->rs_list));
-
-	hrt = ptlrpc_hr_select(rs->rs_svcpt);
-
-	spin_lock(&hrt->hrt_lock);
-	list_add_tail(&rs->rs_list, &hrt->hrt_queue);
-	spin_unlock(&hrt->hrt_lock);
-
-	wake_up(&hrt->hrt_waitq);
-}
-
-void
-ptlrpc_schedule_difficult_reply(struct ptlrpc_reply_state *rs)
-{
-	assert_spin_locked(&rs->rs_svcpt->scp_rep_lock);
-	assert_spin_locked(&rs->rs_lock);
-	LASSERT(rs->rs_difficult);
-	rs->rs_scheduled_ever = 1;  /* flag any notification attempt */
-
-	if (rs->rs_scheduled) {     /* being set up or already notified */
-		return;
-	}
-
-	rs->rs_scheduled = 1;
-	list_del_init(&rs->rs_list);
-	ptlrpc_dispatch_difficult_reply(rs);
-}
-EXPORT_SYMBOL(ptlrpc_schedule_difficult_reply);
-
-static int
-ptlrpc_server_post_idle_rqbds(struct ptlrpc_service_part *svcpt)
-{
-	struct ptlrpc_request_buffer_desc *rqbd;
-	int rc;
-	int posted = 0;
-
-	for (;;) {
-		spin_lock(&svcpt->scp_lock);
-
-		if (list_empty(&svcpt->scp_rqbd_idle)) {
-			spin_unlock(&svcpt->scp_lock);
-			return posted;
-		}
-
-		rqbd = list_entry(svcpt->scp_rqbd_idle.next,
-				  struct ptlrpc_request_buffer_desc,
-				  rqbd_list);
-		list_del(&rqbd->rqbd_list);
-
-		/* assume we will post successfully */
-		svcpt->scp_nrqbds_posted++;
-		list_add(&rqbd->rqbd_list, &svcpt->scp_rqbd_posted);
-
-		spin_unlock(&svcpt->scp_lock);
-
-		rc = ptlrpc_register_rqbd(rqbd);
-		if (rc != 0)
-			break;
-
-		posted = 1;
-	}
-
-	spin_lock(&svcpt->scp_lock);
-
-	svcpt->scp_nrqbds_posted--;
-	list_del(&rqbd->rqbd_list);
-	list_add_tail(&rqbd->rqbd_list, &svcpt->scp_rqbd_idle);
-
-	/* Don't complain if no request buffers are posted right now; LNET
-	 * won't drop requests because we set the portal lazy!
-	 */
-
-	spin_unlock(&svcpt->scp_lock);
-
-	return -1;
-}
-
-static void ptlrpc_at_timer(struct timer_list *t)
-{
-	struct ptlrpc_service_part *svcpt;
-
-	svcpt = from_timer(svcpt, t, scp_at_timer);
-
-	svcpt->scp_at_check = 1;
-	svcpt->scp_at_checktime = cfs_time_current();
-	wake_up(&svcpt->scp_waitq);
-}
-
-static void
-ptlrpc_server_nthreads_check(struct ptlrpc_service *svc,
-			     struct ptlrpc_service_conf *conf)
-{
-	struct ptlrpc_service_thr_conf *tc = &conf->psc_thr;
-	unsigned int init;
-	unsigned int total;
-	unsigned int nthrs;
-	int weight;
-
-	/*
-	 * Common code for estimating & validating threads number.
-	 * CPT affinity service could have percpt thread-pool instead
-	 * of a global thread-pool, which means user might not always
-	 * get the threads number they give it in conf::tc_nthrs_user
-	 * even they did set. It's because we need to validate threads
-	 * number for each CPT to guarantee each pool will have enough
-	 * threads to keep the service healthy.
-	 */
-	init = PTLRPC_NTHRS_INIT + (svc->srv_ops.so_hpreq_handler != NULL);
-	init = max_t(int, init, tc->tc_nthrs_init);
-
-	/* NB: please see comments in lustre_lnet.h for definition
-	 * details of these members
-	 */
-	LASSERT(tc->tc_nthrs_max != 0);
-
-	if (tc->tc_nthrs_user != 0) {
-		/* In case there is a reason to test a service with many
-		 * threads, we give a less strict check here, it can
-		 * be up to 8 * nthrs_max
-		 */
-		total = min(tc->tc_nthrs_max * 8, tc->tc_nthrs_user);
-		nthrs = total / svc->srv_ncpts;
-		init = max(init, nthrs);
-		goto out;
-	}
-
-	total = tc->tc_nthrs_max;
-	if (tc->tc_nthrs_base == 0) {
-		/* don't care about base threads number per partition,
-		 * this is most for non-affinity service
-		 */
-		nthrs = total / svc->srv_ncpts;
-		goto out;
-	}
-
-	nthrs = tc->tc_nthrs_base;
-	if (svc->srv_ncpts == 1) {
-		int i;
-
-		/* NB: Increase the base number if it's single partition
-		 * and total number of cores/HTs is larger or equal to 4.
-		 * result will always < 2 * nthrs_base
-		 */
-		weight = cfs_cpt_weight(svc->srv_cptable, CFS_CPT_ANY);
-		for (i = 1; (weight >> (i + 1)) != 0 && /* >= 4 cores/HTs */
-			    (tc->tc_nthrs_base >> i) != 0; i++)
-			nthrs += tc->tc_nthrs_base >> i;
-	}
-
-	if (tc->tc_thr_factor != 0) {
-		int factor = tc->tc_thr_factor;
-		const int fade = 4;
-
-		/*
-		 * User wants to increase number of threads with for
-		 * each CPU core/HT, most likely the factor is larger then
-		 * one thread/core because service threads are supposed to
-		 * be blocked by lock or wait for IO.
-		 */
-		/*
-		 * Amdahl's law says that adding processors wouldn't give
-		 * a linear increasing of parallelism, so it's nonsense to
-		 * have too many threads no matter how many cores/HTs
-		 * there are.
-		 */
-		/* weight is # of HTs */
-		if (cpumask_weight(topology_sibling_cpumask(0)) > 1) {
-			/* depress thread factor for hyper-thread */
-			factor = factor - (factor >> 1) + (factor >> 3);
-		}
-
-		weight = cfs_cpt_weight(svc->srv_cptable, 0);
-		LASSERT(weight > 0);
-
-		for (; factor > 0 && weight > 0; factor--, weight -= fade)
-			nthrs += min(weight, fade) * factor;
-	}
-
-	if (nthrs * svc->srv_ncpts > tc->tc_nthrs_max) {
-		nthrs = max(tc->tc_nthrs_base,
-			    tc->tc_nthrs_max / svc->srv_ncpts);
-	}
- out:
-	nthrs = max(nthrs, tc->tc_nthrs_init);
-	svc->srv_nthrs_cpt_limit = nthrs;
-	svc->srv_nthrs_cpt_init = init;
-
-	if (nthrs * svc->srv_ncpts > tc->tc_nthrs_max) {
-		CDEBUG(D_OTHER, "%s: This service may have more threads (%d) than the given soft limit (%d)\n",
-		       svc->srv_name, nthrs * svc->srv_ncpts,
-		       tc->tc_nthrs_max);
-	}
-}
-
-/**
- * Initialize percpt data for a service
- */
-static int
-ptlrpc_service_part_init(struct ptlrpc_service *svc,
-			 struct ptlrpc_service_part *svcpt, int cpt)
-{
-	struct ptlrpc_at_array	*array;
-	int size;
-	int index;
-	int rc;
-
-	svcpt->scp_cpt = cpt;
-	INIT_LIST_HEAD(&svcpt->scp_threads);
-
-	/* rqbd and incoming request queue */
-	spin_lock_init(&svcpt->scp_lock);
-	INIT_LIST_HEAD(&svcpt->scp_rqbd_idle);
-	INIT_LIST_HEAD(&svcpt->scp_rqbd_posted);
-	INIT_LIST_HEAD(&svcpt->scp_req_incoming);
-	init_waitqueue_head(&svcpt->scp_waitq);
-	/* history request & rqbd list */
-	INIT_LIST_HEAD(&svcpt->scp_hist_reqs);
-	INIT_LIST_HEAD(&svcpt->scp_hist_rqbds);
-
-	/* active requests and hp requests */
-	spin_lock_init(&svcpt->scp_req_lock);
-
-	/* reply states */
-	spin_lock_init(&svcpt->scp_rep_lock);
-	INIT_LIST_HEAD(&svcpt->scp_rep_active);
-	INIT_LIST_HEAD(&svcpt->scp_rep_idle);
-	init_waitqueue_head(&svcpt->scp_rep_waitq);
-	atomic_set(&svcpt->scp_nreps_difficult, 0);
-
-	/* adaptive timeout */
-	spin_lock_init(&svcpt->scp_at_lock);
-	array = &svcpt->scp_at_array;
-
-	size = at_est2timeout(at_max);
-	array->paa_size = size;
-	array->paa_count = 0;
-	array->paa_deadline = -1;
-
-	/* allocate memory for scp_at_array (ptlrpc_at_array) */
-	array->paa_reqs_array =
-		kzalloc_node(sizeof(struct list_head) * size, GFP_NOFS,
-			     cfs_cpt_spread_node(svc->srv_cptable, cpt));
-	if (!array->paa_reqs_array)
-		return -ENOMEM;
-
-	for (index = 0; index < size; index++)
-		INIT_LIST_HEAD(&array->paa_reqs_array[index]);
-
-	array->paa_reqs_count =
-		kzalloc_node(sizeof(__u32) * size, GFP_NOFS,
-			     cfs_cpt_spread_node(svc->srv_cptable, cpt));
-	if (!array->paa_reqs_count)
-		goto free_reqs_array;
-
-	timer_setup(&svcpt->scp_at_timer, ptlrpc_at_timer, 0);
-
-	/* At SOW, service time should be quick; 10s seems generous. If client
-	 * timeout is less than this, we'll be sending an early reply.
-	 */
-	at_init(&svcpt->scp_at_estimate, 10, 0);
-
-	/* assign this before call ptlrpc_grow_req_bufs */
-	svcpt->scp_service = svc;
-	/* Now allocate the request buffers, but don't post them now */
-	rc = ptlrpc_grow_req_bufs(svcpt, 0);
-	/* We shouldn't be under memory pressure at startup, so
-	 * fail if we can't allocate all our buffers at this time.
-	 */
-	if (rc != 0)
-		goto free_reqs_count;
-
-	return 0;
-
-free_reqs_count:
-	kfree(array->paa_reqs_count);
-	array->paa_reqs_count = NULL;
-free_reqs_array:
-	kfree(array->paa_reqs_array);
-	array->paa_reqs_array = NULL;
-
-	return -ENOMEM;
-}
-
-/**
- * Initialize service on a given portal.
- * This includes starting serving threads , allocating and posting rqbds and
- * so on.
- */
-struct ptlrpc_service *
-ptlrpc_register_service(struct ptlrpc_service_conf *conf,
-			struct kset *parent,
-			struct dentry *debugfs_entry)
-{
-	struct ptlrpc_service_cpt_conf *cconf = &conf->psc_cpt;
-	struct ptlrpc_service *service;
-	struct ptlrpc_service_part *svcpt;
-	struct cfs_cpt_table *cptable;
-	__u32 *cpts = NULL;
-	int ncpts;
-	int cpt;
-	int rc;
-	int i;
-
-	LASSERT(conf->psc_buf.bc_nbufs > 0);
-	LASSERT(conf->psc_buf.bc_buf_size >=
-		conf->psc_buf.bc_req_max_size + SPTLRPC_MAX_PAYLOAD);
-	LASSERT(conf->psc_thr.tc_ctx_tags != 0);
-
-	cptable = cconf->cc_cptable;
-	if (!cptable)
-		cptable = cfs_cpt_table;
-
-	if (!conf->psc_thr.tc_cpu_affinity) {
-		ncpts = 1;
-	} else {
-		ncpts = cfs_cpt_number(cptable);
-		if (cconf->cc_pattern) {
-			struct cfs_expr_list *el;
-
-			rc = cfs_expr_list_parse(cconf->cc_pattern,
-						 strlen(cconf->cc_pattern),
-						 0, ncpts - 1, &el);
-			if (rc != 0) {
-				CERROR("%s: invalid CPT pattern string: %s",
-				       conf->psc_name, cconf->cc_pattern);
-				return ERR_PTR(-EINVAL);
-			}
-
-			rc = cfs_expr_list_values(el, ncpts, &cpts);
-			cfs_expr_list_free(el);
-			if (rc <= 0) {
-				CERROR("%s: failed to parse CPT array %s: %d\n",
-				       conf->psc_name, cconf->cc_pattern, rc);
-				kfree(cpts);
-				return ERR_PTR(rc < 0 ? rc : -EINVAL);
-			}
-			ncpts = rc;
-		}
-	}
-
-	service = kzalloc(offsetof(struct ptlrpc_service, srv_parts[ncpts]),
-			  GFP_NOFS);
-	if (!service) {
-		kfree(cpts);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	service->srv_cptable = cptable;
-	service->srv_cpts = cpts;
-	service->srv_ncpts = ncpts;
-
-	service->srv_cpt_bits = 0; /* it's zero already, easy to read... */
-	while ((1 << service->srv_cpt_bits) < cfs_cpt_number(cptable))
-		service->srv_cpt_bits++;
-
-	/* public members */
-	spin_lock_init(&service->srv_lock);
-	service->srv_name = conf->psc_name;
-	service->srv_watchdog_factor = conf->psc_watchdog_factor;
-	INIT_LIST_HEAD(&service->srv_list); /* for safety of cleanup */
-
-	/* buffer configuration */
-	service->srv_nbuf_per_group = test_req_buffer_pressure ?
-					  1 : conf->psc_buf.bc_nbufs;
-	service->srv_max_req_size = conf->psc_buf.bc_req_max_size +
-					  SPTLRPC_MAX_PAYLOAD;
-	service->srv_buf_size = conf->psc_buf.bc_buf_size;
-	service->srv_rep_portal	= conf->psc_buf.bc_rep_portal;
-	service->srv_req_portal	= conf->psc_buf.bc_req_portal;
-
-	/* Increase max reply size to next power of two */
-	service->srv_max_reply_size = 1;
-	while (service->srv_max_reply_size <
-	       conf->psc_buf.bc_rep_max_size + SPTLRPC_MAX_PAYLOAD)
-		service->srv_max_reply_size <<= 1;
-
-	service->srv_thread_name = conf->psc_thr.tc_thr_name;
-	service->srv_ctx_tags = conf->psc_thr.tc_ctx_tags;
-	service->srv_hpreq_ratio = PTLRPC_SVC_HP_RATIO;
-	service->srv_ops = conf->psc_ops;
-
-	for (i = 0; i < ncpts; i++) {
-		if (!conf->psc_thr.tc_cpu_affinity)
-			cpt = CFS_CPT_ANY;
-		else
-			cpt = cpts ? cpts[i] : i;
-
-		svcpt = kzalloc_node(sizeof(*svcpt), GFP_NOFS,
-				     cfs_cpt_spread_node(cptable, cpt));
-		if (!svcpt) {
-			rc = -ENOMEM;
-			goto failed;
-		}
-
-		service->srv_parts[i] = svcpt;
-		rc = ptlrpc_service_part_init(service, svcpt, cpt);
-		if (rc != 0)
-			goto failed;
-	}
-
-	ptlrpc_server_nthreads_check(service, conf);
-
-	rc = LNetSetLazyPortal(service->srv_req_portal);
-	LASSERT(rc == 0);
-
-	mutex_lock(&ptlrpc_all_services_mutex);
-	list_add(&service->srv_list, &ptlrpc_all_services);
-	mutex_unlock(&ptlrpc_all_services_mutex);
-
-	if (parent) {
-		rc = ptlrpc_sysfs_register_service(parent, service);
-		if (rc)
-			goto failed;
-	}
-
-	if (!IS_ERR_OR_NULL(debugfs_entry))
-		ptlrpc_ldebugfs_register_service(debugfs_entry, service);
-
-	rc = ptlrpc_service_nrs_setup(service);
-	if (rc != 0)
-		goto failed;
-
-	CDEBUG(D_NET, "%s: Started, listening on portal %d\n",
-	       service->srv_name, service->srv_req_portal);
-
-	rc = ptlrpc_start_threads(service);
-	if (rc != 0) {
-		CERROR("Failed to start threads for service %s: %d\n",
-		       service->srv_name, rc);
-		goto failed;
-	}
-
-	return service;
-failed:
-	ptlrpc_unregister_service(service);
-	return ERR_PTR(rc);
-}
-EXPORT_SYMBOL(ptlrpc_register_service);
-
-/**
- * to actually free the request, must be called without holding svc_lock.
- * note it's caller's responsibility to unlink req->rq_list.
- */
-static void ptlrpc_server_free_request(struct ptlrpc_request *req)
-{
-	LASSERT(atomic_read(&req->rq_refcount) == 0);
-	LASSERT(list_empty(&req->rq_timed_list));
-
-	 /* DEBUG_REQ() assumes the reply state of a request with a valid
-	  * ref will not be destroyed until that reference is dropped.
-	  */
-	ptlrpc_req_drop_rs(req);
-
-	sptlrpc_svc_ctx_decref(req);
-
-	if (req != &req->rq_rqbd->rqbd_req) {
-		/* NB request buffers use an embedded
-		 * req if the incoming req unlinked the
-		 * MD; this isn't one of them!
-		 */
-		ptlrpc_request_cache_free(req);
-	}
-}
-
-/**
- * drop a reference count of the request. if it reaches 0, we either
- * put it into history list, or free it immediately.
- */
-static void ptlrpc_server_drop_request(struct ptlrpc_request *req)
-{
-	struct ptlrpc_request_buffer_desc *rqbd = req->rq_rqbd;
-	struct ptlrpc_service_part *svcpt = rqbd->rqbd_svcpt;
-	struct ptlrpc_service *svc = svcpt->scp_service;
-	int refcount;
-
-	if (!atomic_dec_and_test(&req->rq_refcount))
-		return;
-
-	if (req->rq_at_linked) {
-		spin_lock(&svcpt->scp_at_lock);
-		/* recheck with lock, in case it's unlinked by
-		 * ptlrpc_at_check_timed()
-		 */
-		if (likely(req->rq_at_linked))
-			ptlrpc_at_remove_timed(req);
-		spin_unlock(&svcpt->scp_at_lock);
-	}
-
-	LASSERT(list_empty(&req->rq_timed_list));
-
-	/* finalize request */
-	if (req->rq_export) {
-		class_export_put(req->rq_export);
-		req->rq_export = NULL;
-	}
-
-	spin_lock(&svcpt->scp_lock);
-
-	list_add(&req->rq_list, &rqbd->rqbd_reqs);
-
-	refcount = --(rqbd->rqbd_refcount);
-	if (refcount == 0) {
-		/* request buffer is now idle: add to history */
-		list_del(&rqbd->rqbd_list);
-
-		list_add_tail(&rqbd->rqbd_list, &svcpt->scp_hist_rqbds);
-		svcpt->scp_hist_nrqbds++;
-
-		/* cull some history?
-		 * I expect only about 1 or 2 rqbds need to be recycled here
-		 */
-		while (svcpt->scp_hist_nrqbds > svc->srv_hist_nrqbds_cpt_max) {
-			rqbd = list_entry(svcpt->scp_hist_rqbds.next,
-					  struct ptlrpc_request_buffer_desc,
-					  rqbd_list);
-
-			list_del(&rqbd->rqbd_list);
-			svcpt->scp_hist_nrqbds--;
-
-			/* remove rqbd's reqs from svc's req history while
-			 * I've got the service lock
-			 */
-			list_for_each_entry(req, &rqbd->rqbd_reqs, rq_list) {
-				/* Track the highest culled req seq */
-				if (req->rq_history_seq >
-				    svcpt->scp_hist_seq_culled) {
-					svcpt->scp_hist_seq_culled =
-						req->rq_history_seq;
-				}
-				list_del(&req->rq_history_list);
-			}
-
-			spin_unlock(&svcpt->scp_lock);
-
-			while ((req = list_first_entry_or_null(
-					&rqbd->rqbd_reqs,
-					struct ptlrpc_request, rq_list))) {
-				list_del(&req->rq_list);
-				ptlrpc_server_free_request(req);
-			}
-
-			spin_lock(&svcpt->scp_lock);
-			/*
-			 * now all reqs including the embedded req has been
-			 * disposed, schedule request buffer for re-use.
-			 */
-			LASSERT(atomic_read(&rqbd->rqbd_req.rq_refcount) ==
-				0);
-			list_add_tail(&rqbd->rqbd_list, &svcpt->scp_rqbd_idle);
-		}
-
-		spin_unlock(&svcpt->scp_lock);
-	} else if (req->rq_reply_state && req->rq_reply_state->rs_prealloc) {
-		/* If we are low on memory, we are not interested in history */
-		list_del(&req->rq_list);
-		list_del_init(&req->rq_history_list);
-
-		/* Track the highest culled req seq */
-		if (req->rq_history_seq > svcpt->scp_hist_seq_culled)
-			svcpt->scp_hist_seq_culled = req->rq_history_seq;
-
-		spin_unlock(&svcpt->scp_lock);
-
-		ptlrpc_server_free_request(req);
-	} else {
-		spin_unlock(&svcpt->scp_lock);
-	}
-}
-
-/**
- * to finish a request: stop sending more early replies, and release
- * the request.
- */
-static void ptlrpc_server_finish_request(struct ptlrpc_service_part *svcpt,
-					 struct ptlrpc_request *req)
-{
-	ptlrpc_server_hpreq_fini(req);
-
-	if (req->rq_session.lc_thread) {
-		lu_context_exit(&req->rq_session);
-		lu_context_fini(&req->rq_session);
-	}
-
-	ptlrpc_server_drop_request(req);
-}
-
-/**
- * to finish a active request: stop sending more early replies, and release
- * the request. should be called after we finished handling the request.
- */
-static void ptlrpc_server_finish_active_request(
-					struct ptlrpc_service_part *svcpt,
-					struct ptlrpc_request *req)
-{
-	spin_lock(&svcpt->scp_req_lock);
-	ptlrpc_nrs_req_stop_nolock(req);
-	svcpt->scp_nreqs_active--;
-	if (req->rq_hp)
-		svcpt->scp_nhreqs_active--;
-	spin_unlock(&svcpt->scp_req_lock);
-
-	ptlrpc_nrs_req_finalize(req);
-
-	if (req->rq_export)
-		class_export_rpc_dec(req->rq_export);
-
-	ptlrpc_server_finish_request(svcpt, req);
-}
-
-/**
- * Sanity check request \a req.
- * Return 0 if all is ok, error code otherwise.
- */
-static int ptlrpc_check_req(struct ptlrpc_request *req)
-{
-	struct obd_device *obd = req->rq_export->exp_obd;
-	int rc = 0;
-
-	if (unlikely(lustre_msg_get_conn_cnt(req->rq_reqmsg) <
-		     req->rq_export->exp_conn_cnt)) {
-		DEBUG_REQ(D_RPCTRACE, req,
-			  "DROPPING req from old connection %d < %d",
-			  lustre_msg_get_conn_cnt(req->rq_reqmsg),
-			  req->rq_export->exp_conn_cnt);
-		return -EEXIST;
-	}
-	if (unlikely(!obd || obd->obd_fail)) {
-		/*
-		 * Failing over, don't handle any more reqs, send
-		 * error response instead.
-		 */
-		CDEBUG(D_RPCTRACE, "Dropping req %p for failed obd %s\n",
-		       req, obd ? obd->obd_name : "unknown");
-		rc = -ENODEV;
-	} else if (lustre_msg_get_flags(req->rq_reqmsg) &
-		   (MSG_REPLAY | MSG_REQ_REPLAY_DONE)) {
-		DEBUG_REQ(D_ERROR, req, "Invalid replay without recovery");
-		class_fail_export(req->rq_export);
-		rc = -ENODEV;
-	} else if (lustre_msg_get_transno(req->rq_reqmsg) != 0) {
-		DEBUG_REQ(D_ERROR, req,
-			  "Invalid req with transno %llu without recovery",
-			  lustre_msg_get_transno(req->rq_reqmsg));
-		class_fail_export(req->rq_export);
-		rc = -ENODEV;
-	}
-
-	if (unlikely(rc < 0)) {
-		req->rq_status = rc;
-		ptlrpc_error(req);
-	}
-	return rc;
-}
-
-static void ptlrpc_at_set_timer(struct ptlrpc_service_part *svcpt)
-{
-	struct ptlrpc_at_array *array = &svcpt->scp_at_array;
-	__s32 next;
-
-	if (array->paa_count == 0) {
-		del_timer(&svcpt->scp_at_timer);
-		return;
-	}
-
-	/* Set timer for closest deadline */
-	next = (__s32)(array->paa_deadline - ktime_get_real_seconds() -
-		       at_early_margin);
-	if (next <= 0) {
-		ptlrpc_at_timer(&svcpt->scp_at_timer);
-	} else {
-		mod_timer(&svcpt->scp_at_timer, cfs_time_shift(next));
-		CDEBUG(D_INFO, "armed %s at %+ds\n",
-		       svcpt->scp_service->srv_name, next);
-	}
-}
-
-/* Add rpc to early reply check list */
-static int ptlrpc_at_add_timed(struct ptlrpc_request *req)
-{
-	struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
-	struct ptlrpc_at_array *array = &svcpt->scp_at_array;
-	struct ptlrpc_request *rq = NULL;
-	__u32 index;
-
-	if (AT_OFF)
-		return 0;
-
-	if (req->rq_no_reply)
-		return 0;
-
-	if ((lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT) == 0)
-		return -ENOSYS;
-
-	spin_lock(&svcpt->scp_at_lock);
-	LASSERT(list_empty(&req->rq_timed_list));
-
-	div_u64_rem(req->rq_deadline, array->paa_size, &index);
-	if (array->paa_reqs_count[index] > 0) {
-		/* latest rpcs will have the latest deadlines in the list,
-		 * so search backward.
-		 */
-		list_for_each_entry_reverse(rq, &array->paa_reqs_array[index],
-					    rq_timed_list) {
-			if (req->rq_deadline >= rq->rq_deadline) {
-				list_add(&req->rq_timed_list,
-					 &rq->rq_timed_list);
-				break;
-			}
-		}
-	}
-
-	/* Add the request at the head of the list */
-	if (list_empty(&req->rq_timed_list))
-		list_add(&req->rq_timed_list, &array->paa_reqs_array[index]);
-
-	spin_lock(&req->rq_lock);
-	req->rq_at_linked = 1;
-	spin_unlock(&req->rq_lock);
-	req->rq_at_index = index;
-	array->paa_reqs_count[index]++;
-	array->paa_count++;
-	if (array->paa_count == 1 || array->paa_deadline > req->rq_deadline) {
-		array->paa_deadline = req->rq_deadline;
-		ptlrpc_at_set_timer(svcpt);
-	}
-	spin_unlock(&svcpt->scp_at_lock);
-
-	return 0;
-}
-
-static void
-ptlrpc_at_remove_timed(struct ptlrpc_request *req)
-{
-	struct ptlrpc_at_array *array;
-
-	array = &req->rq_rqbd->rqbd_svcpt->scp_at_array;
-
-	/* NB: must call with hold svcpt::scp_at_lock */
-	LASSERT(!list_empty(&req->rq_timed_list));
-	list_del_init(&req->rq_timed_list);
-
-	spin_lock(&req->rq_lock);
-	req->rq_at_linked = 0;
-	spin_unlock(&req->rq_lock);
-
-	array->paa_reqs_count[req->rq_at_index]--;
-	array->paa_count--;
-}
-
-/*
- * Attempt to extend the request deadline by sending an early reply to the
- * client.
- */
-static int ptlrpc_at_send_early_reply(struct ptlrpc_request *req)
-{
-	struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
-	struct ptlrpc_request *reqcopy;
-	struct lustre_msg *reqmsg;
-	long olddl = req->rq_deadline - ktime_get_real_seconds();
-	time64_t newdl;
-	int rc;
-
-	/* deadline is when the client expects us to reply, margin is the
-	 * difference between clients' and servers' expectations
-	 */
-	DEBUG_REQ(D_ADAPTTO, req,
-		  "%ssending early reply (deadline %+lds, margin %+lds) for %d+%d",
-		  AT_OFF ? "AT off - not " : "",
-		  olddl, olddl - at_get(&svcpt->scp_at_estimate),
-		  at_get(&svcpt->scp_at_estimate), at_extra);
-
-	if (AT_OFF)
-		return 0;
-
-	if (olddl < 0) {
-		DEBUG_REQ(D_WARNING, req, "Already past deadline (%+lds), not sending early reply. Consider increasing at_early_margin (%d)?",
-			  olddl, at_early_margin);
-
-		/* Return an error so we're not re-added to the timed list. */
-		return -ETIMEDOUT;
-	}
-
-	if (!(lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT)) {
-		DEBUG_REQ(D_INFO, req, "Wanted to ask client for more time, but no AT support");
-		return -ENOSYS;
-	}
-
-	/*
-	 * We want to extend the request deadline by at_extra seconds,
-	 * so we set our service estimate to reflect how much time has
-	 * passed since this request arrived plus an additional
-	 * at_extra seconds. The client will calculate the new deadline
-	 * based on this service estimate (plus some additional time to
-	 * account for network latency). See ptlrpc_at_recv_early_reply
-	 */
-	at_measured(&svcpt->scp_at_estimate, at_extra +
-		    ktime_get_real_seconds() - req->rq_arrival_time.tv_sec);
-	newdl = req->rq_arrival_time.tv_sec + at_get(&svcpt->scp_at_estimate);
-
-	/* Check to see if we've actually increased the deadline -
-	 * we may be past adaptive_max
-	 */
-	if (req->rq_deadline >= newdl) {
-		DEBUG_REQ(D_WARNING, req, "Couldn't add any time (%ld/%lld), not sending early reply\n",
-			  olddl, newdl - ktime_get_real_seconds());
-		return -ETIMEDOUT;
-	}
-
-	reqcopy = ptlrpc_request_cache_alloc(GFP_NOFS);
-	if (!reqcopy)
-		return -ENOMEM;
-	reqmsg = kvzalloc(req->rq_reqlen, GFP_NOFS);
-	if (!reqmsg) {
-		rc = -ENOMEM;
-		goto out_free;
-	}
-
-	*reqcopy = *req;
-	reqcopy->rq_reply_state = NULL;
-	reqcopy->rq_rep_swab_mask = 0;
-	reqcopy->rq_pack_bulk = 0;
-	reqcopy->rq_pack_udesc = 0;
-	reqcopy->rq_packed_final = 0;
-	sptlrpc_svc_ctx_addref(reqcopy);
-	/* We only need the reqmsg for the magic */
-	reqcopy->rq_reqmsg = reqmsg;
-	memcpy(reqmsg, req->rq_reqmsg, req->rq_reqlen);
-
-	LASSERT(atomic_read(&req->rq_refcount));
-	/** if it is last refcount then early reply isn't needed */
-	if (atomic_read(&req->rq_refcount) == 1) {
-		DEBUG_REQ(D_ADAPTTO, reqcopy, "Normal reply already sent out, abort sending early reply\n");
-		rc = -EINVAL;
-		goto out;
-	}
-
-	/* Connection ref */
-	reqcopy->rq_export = class_conn2export(
-				     lustre_msg_get_handle(reqcopy->rq_reqmsg));
-	if (!reqcopy->rq_export) {
-		rc = -ENODEV;
-		goto out;
-	}
-
-	/* RPC ref */
-	class_export_rpc_inc(reqcopy->rq_export);
-	if (reqcopy->rq_export->exp_obd &&
-	    reqcopy->rq_export->exp_obd->obd_fail) {
-		rc = -ENODEV;
-		goto out_put;
-	}
-
-	rc = lustre_pack_reply_flags(reqcopy, 1, NULL, NULL, LPRFL_EARLY_REPLY);
-	if (rc)
-		goto out_put;
-
-	rc = ptlrpc_send_reply(reqcopy, PTLRPC_REPLY_EARLY);
-
-	if (!rc) {
-		/* Adjust our own deadline to what we told the client */
-		req->rq_deadline = newdl;
-		req->rq_early_count++; /* number sent, server side */
-	} else {
-		DEBUG_REQ(D_ERROR, req, "Early reply send failed %d", rc);
-	}
-
-	/* Free the (early) reply state from lustre_pack_reply.
-	 * (ptlrpc_send_reply takes it's own rs ref, so this is safe here)
-	 */
-	ptlrpc_req_drop_rs(reqcopy);
-
-out_put:
-	class_export_rpc_dec(reqcopy->rq_export);
-	class_export_put(reqcopy->rq_export);
-out:
-	sptlrpc_svc_ctx_decref(reqcopy);
-	kvfree(reqmsg);
-out_free:
-	ptlrpc_request_cache_free(reqcopy);
-	return rc;
-}
-
-/* Send early replies to everybody expiring within at_early_margin
- * asking for at_extra time
- */
-static void ptlrpc_at_check_timed(struct ptlrpc_service_part *svcpt)
-{
-	struct ptlrpc_at_array *array = &svcpt->scp_at_array;
-	struct ptlrpc_request *rq, *n;
-	struct list_head work_list;
-	__u32 index, count;
-	time64_t deadline;
-	time64_t now = ktime_get_real_seconds();
-	long delay;
-	int first, counter = 0;
-
-	spin_lock(&svcpt->scp_at_lock);
-	if (svcpt->scp_at_check == 0) {
-		spin_unlock(&svcpt->scp_at_lock);
-		return;
-	}
-	delay = cfs_time_sub(cfs_time_current(), svcpt->scp_at_checktime);
-	svcpt->scp_at_check = 0;
-
-	if (array->paa_count == 0) {
-		spin_unlock(&svcpt->scp_at_lock);
-		return;
-	}
-
-	/* The timer went off, but maybe the nearest rpc already completed. */
-	first = array->paa_deadline - now;
-	if (first > at_early_margin) {
-		/* We've still got plenty of time.  Reset the timer. */
-		ptlrpc_at_set_timer(svcpt);
-		spin_unlock(&svcpt->scp_at_lock);
-		return;
-	}
-
-	/* We're close to a timeout, and we don't know how much longer the
-	 * server will take. Send early replies to everyone expiring soon.
-	 */
-	INIT_LIST_HEAD(&work_list);
-	deadline = -1;
-	div_u64_rem(array->paa_deadline, array->paa_size, &index);
-	count = array->paa_count;
-	while (count > 0) {
-		count -= array->paa_reqs_count[index];
-		list_for_each_entry_safe(rq, n, &array->paa_reqs_array[index],
-					 rq_timed_list) {
-			if (rq->rq_deadline > now + at_early_margin) {
-				/* update the earliest deadline */
-				if (deadline == -1 ||
-				    rq->rq_deadline < deadline)
-					deadline = rq->rq_deadline;
-				break;
-			}
-
-			ptlrpc_at_remove_timed(rq);
-			/**
-			 * ptlrpc_server_drop_request() may drop
-			 * refcount to 0 already. Let's check this and
-			 * don't add entry to work_list
-			 */
-			if (likely(atomic_inc_not_zero(&rq->rq_refcount)))
-				list_add(&rq->rq_timed_list, &work_list);
-			counter++;
-		}
-
-		if (++index >= array->paa_size)
-			index = 0;
-	}
-	array->paa_deadline = deadline;
-	/* we have a new earliest deadline, restart the timer */
-	ptlrpc_at_set_timer(svcpt);
-
-	spin_unlock(&svcpt->scp_at_lock);
-
-	CDEBUG(D_ADAPTTO, "timeout in %+ds, asking for %d secs on %d early replies\n",
-	       first, at_extra, counter);
-	if (first < 0) {
-		/* We're already past request deadlines before we even get a
-		 * chance to send early replies
-		 */
-		LCONSOLE_WARN("%s: This server is not able to keep up with request traffic (cpu-bound).\n",
-			      svcpt->scp_service->srv_name);
-		CWARN("earlyQ=%d reqQ=%d recA=%d, svcEst=%d, delay=%ld(jiff)\n",
-		      counter, svcpt->scp_nreqs_incoming,
-		      svcpt->scp_nreqs_active,
-		      at_get(&svcpt->scp_at_estimate), delay);
-	}
-
-	/* we took additional refcount so entries can't be deleted from list, no
-	 * locking is needed
-	 */
-	while (!list_empty(&work_list)) {
-		rq = list_entry(work_list.next, struct ptlrpc_request,
-				rq_timed_list);
-		list_del_init(&rq->rq_timed_list);
-
-		if (ptlrpc_at_send_early_reply(rq) == 0)
-			ptlrpc_at_add_timed(rq);
-
-		ptlrpc_server_drop_request(rq);
-	}
-}
-
-/**
- * Put the request to the export list if the request may become
- * a high priority one.
- */
-static int ptlrpc_server_hpreq_init(struct ptlrpc_service_part *svcpt,
-				    struct ptlrpc_request *req)
-{
-	int rc = 0;
-
-	if (svcpt->scp_service->srv_ops.so_hpreq_handler) {
-		rc = svcpt->scp_service->srv_ops.so_hpreq_handler(req);
-		if (rc < 0)
-			return rc;
-		LASSERT(rc == 0);
-	}
-	if (req->rq_export && req->rq_ops) {
-		/* Perform request specific check. We should do this check
-		 * before the request is added into exp_hp_rpcs list otherwise
-		 * it may hit swab race at LU-1044.
-		 */
-		if (req->rq_ops->hpreq_check) {
-			rc = req->rq_ops->hpreq_check(req);
-			if (rc == -ESTALE) {
-				req->rq_status = rc;
-				ptlrpc_error(req);
-			}
-			/** can only return error,
-			 * 0 for normal request,
-			 *  or 1 for high priority request
-			 */
-			LASSERT(rc <= 1);
-		}
-
-		spin_lock_bh(&req->rq_export->exp_rpc_lock);
-		list_add(&req->rq_exp_list, &req->rq_export->exp_hp_rpcs);
-		spin_unlock_bh(&req->rq_export->exp_rpc_lock);
-	}
-
-	ptlrpc_nrs_req_initialize(svcpt, req, rc);
-
-	return rc;
-}
-
-/** Remove the request from the export list. */
-static void ptlrpc_server_hpreq_fini(struct ptlrpc_request *req)
-{
-	if (req->rq_export && req->rq_ops) {
-		/* refresh lock timeout again so that client has more
-		 * room to send lock cancel RPC.
-		 */
-		if (req->rq_ops->hpreq_fini)
-			req->rq_ops->hpreq_fini(req);
-
-		spin_lock_bh(&req->rq_export->exp_rpc_lock);
-		list_del_init(&req->rq_exp_list);
-		spin_unlock_bh(&req->rq_export->exp_rpc_lock);
-	}
-}
-
-static int ptlrpc_server_request_add(struct ptlrpc_service_part *svcpt,
-				     struct ptlrpc_request *req)
-{
-	int	rc;
-
-	rc = ptlrpc_server_hpreq_init(svcpt, req);
-	if (rc < 0)
-		return rc;
-
-	ptlrpc_nrs_req_add(svcpt, req, !!rc);
-
-	return 0;
-}
-
-/**
- * Allow to handle high priority request
- * User can call it w/o any lock but need to hold
- * ptlrpc_service_part::scp_req_lock to get reliable result
- */
-static bool ptlrpc_server_allow_high(struct ptlrpc_service_part *svcpt,
-				     bool force)
-{
-	int running = svcpt->scp_nthrs_running;
-
-	if (!nrs_svcpt_has_hp(svcpt))
-		return false;
-
-	if (force)
-		return true;
-
-	if (unlikely(svcpt->scp_service->srv_req_portal == MDS_REQUEST_PORTAL &&
-		     CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CANCEL_RESEND))) {
-		/* leave just 1 thread for normal RPCs */
-		running = PTLRPC_NTHRS_INIT;
-		if (svcpt->scp_service->srv_ops.so_hpreq_handler)
-			running += 1;
-	}
-
-	if (svcpt->scp_nreqs_active >= running - 1)
-		return false;
-
-	if (svcpt->scp_nhreqs_active == 0)
-		return true;
-
-	return !ptlrpc_nrs_req_pending_nolock(svcpt, false) ||
-	       svcpt->scp_hreq_count < svcpt->scp_service->srv_hpreq_ratio;
-}
-
-static bool ptlrpc_server_high_pending(struct ptlrpc_service_part *svcpt,
-				       bool force)
-{
-	return ptlrpc_server_allow_high(svcpt, force) &&
-	       ptlrpc_nrs_req_pending_nolock(svcpt, true);
-}
-
-/**
- * Only allow normal priority requests on a service that has a high-priority
- * queue if forced (i.e. cleanup), if there are other high priority requests
- * already being processed (i.e. those threads can service more high-priority
- * requests), or if there are enough idle threads that a later thread can do
- * a high priority request.
- * User can call it w/o any lock but need to hold
- * ptlrpc_service_part::scp_req_lock to get reliable result
- */
-static bool ptlrpc_server_allow_normal(struct ptlrpc_service_part *svcpt,
-				       bool force)
-{
-	int running = svcpt->scp_nthrs_running;
-
-	if (unlikely(svcpt->scp_service->srv_req_portal == MDS_REQUEST_PORTAL &&
-		     CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CANCEL_RESEND))) {
-		/* leave just 1 thread for normal RPCs */
-		running = PTLRPC_NTHRS_INIT;
-		if (svcpt->scp_service->srv_ops.so_hpreq_handler)
-			running += 1;
-	}
-
-	if (force ||
-	    svcpt->scp_nreqs_active < running - 2)
-		return true;
-
-	if (svcpt->scp_nreqs_active >= running - 1)
-		return false;
-
-	return svcpt->scp_nhreqs_active > 0 || !nrs_svcpt_has_hp(svcpt);
-}
-
-static bool ptlrpc_server_normal_pending(struct ptlrpc_service_part *svcpt,
-					 bool force)
-{
-	return ptlrpc_server_allow_normal(svcpt, force) &&
-	       ptlrpc_nrs_req_pending_nolock(svcpt, false);
-}
-
-/**
- * Returns true if there are requests available in incoming
- * request queue for processing and it is allowed to fetch them.
- * User can call it w/o any lock but need to hold ptlrpc_service::scp_req_lock
- * to get reliable result
- * \see ptlrpc_server_allow_normal
- * \see ptlrpc_server_allow high
- */
-static inline bool
-ptlrpc_server_request_pending(struct ptlrpc_service_part *svcpt, bool force)
-{
-	return ptlrpc_server_high_pending(svcpt, force) ||
-	       ptlrpc_server_normal_pending(svcpt, force);
-}
-
-/**
- * Fetch a request for processing from queue of unprocessed requests.
- * Favors high-priority requests.
- * Returns a pointer to fetched request.
- */
-static struct ptlrpc_request *
-ptlrpc_server_request_get(struct ptlrpc_service_part *svcpt, bool force)
-{
-	struct ptlrpc_request *req = NULL;
-
-	spin_lock(&svcpt->scp_req_lock);
-
-	if (ptlrpc_server_high_pending(svcpt, force)) {
-		req = ptlrpc_nrs_req_get_nolock(svcpt, true, force);
-		if (req) {
-			svcpt->scp_hreq_count++;
-			goto got_request;
-		}
-	}
-
-	if (ptlrpc_server_normal_pending(svcpt, force)) {
-		req = ptlrpc_nrs_req_get_nolock(svcpt, false, force);
-		if (req) {
-			svcpt->scp_hreq_count = 0;
-			goto got_request;
-		}
-	}
-
-	spin_unlock(&svcpt->scp_req_lock);
-	return NULL;
-
-got_request:
-	svcpt->scp_nreqs_active++;
-	if (req->rq_hp)
-		svcpt->scp_nhreqs_active++;
-
-	spin_unlock(&svcpt->scp_req_lock);
-
-	if (likely(req->rq_export))
-		class_export_rpc_inc(req->rq_export);
-
-	return req;
-}
-
-/**
- * Handle freshly incoming reqs, add to timed early reply list,
- * pass on to regular request queue.
- * All incoming requests pass through here before getting into
- * ptlrpc_server_handle_req later on.
- */
-static int
-ptlrpc_server_handle_req_in(struct ptlrpc_service_part *svcpt,
-			    struct ptlrpc_thread *thread)
-{
-	struct ptlrpc_service *svc = svcpt->scp_service;
-	struct ptlrpc_request *req;
-	__u32 deadline;
-	int rc;
-
-	spin_lock(&svcpt->scp_lock);
-	if (list_empty(&svcpt->scp_req_incoming)) {
-		spin_unlock(&svcpt->scp_lock);
-		return 0;
-	}
-
-	req = list_entry(svcpt->scp_req_incoming.next,
-			 struct ptlrpc_request, rq_list);
-	list_del_init(&req->rq_list);
-	svcpt->scp_nreqs_incoming--;
-	/* Consider this still a "queued" request as far as stats are
-	 * concerned
-	 */
-	spin_unlock(&svcpt->scp_lock);
-
-	/* go through security check/transform */
-	rc = sptlrpc_svc_unwrap_request(req);
-	switch (rc) {
-	case SECSVC_OK:
-		break;
-	case SECSVC_COMPLETE:
-		target_send_reply(req, 0, OBD_FAIL_MDS_ALL_REPLY_NET);
-		goto err_req;
-	case SECSVC_DROP:
-		goto err_req;
-	default:
-		LBUG();
-	}
-
-	/*
-	 * for null-flavored rpc, msg has been unpacked by sptlrpc, although
-	 * redo it wouldn't be harmful.
-	 */
-	if (SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != SPTLRPC_POLICY_NULL) {
-		rc = ptlrpc_unpack_req_msg(req, req->rq_reqlen);
-		if (rc != 0) {
-			CERROR("error unpacking request: ptl %d from %s x%llu\n",
-			       svc->srv_req_portal, libcfs_id2str(req->rq_peer),
-			       req->rq_xid);
-			goto err_req;
-		}
-	}
-
-	rc = lustre_unpack_req_ptlrpc_body(req, MSG_PTLRPC_BODY_OFF);
-	if (rc) {
-		CERROR("error unpacking ptlrpc body: ptl %d from %s x%llu\n",
-		       svc->srv_req_portal, libcfs_id2str(req->rq_peer),
-		       req->rq_xid);
-		goto err_req;
-	}
-
-	if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_DROP_REQ_OPC) &&
-	    lustre_msg_get_opc(req->rq_reqmsg) == cfs_fail_val) {
-		CERROR("drop incoming rpc opc %u, x%llu\n",
-		       cfs_fail_val, req->rq_xid);
-		goto err_req;
-	}
-
-	rc = -EINVAL;
-	if (lustre_msg_get_type(req->rq_reqmsg) != PTL_RPC_MSG_REQUEST) {
-		CERROR("wrong packet type received (type=%u) from %s\n",
-		       lustre_msg_get_type(req->rq_reqmsg),
-		       libcfs_id2str(req->rq_peer));
-		goto err_req;
-	}
-
-	switch (lustre_msg_get_opc(req->rq_reqmsg)) {
-	case MDS_WRITEPAGE:
-	case OST_WRITE:
-		req->rq_bulk_write = 1;
-		break;
-	case MDS_READPAGE:
-	case OST_READ:
-	case MGS_CONFIG_READ:
-		req->rq_bulk_read = 1;
-		break;
-	}
-
-	CDEBUG(D_RPCTRACE, "got req x%llu\n", req->rq_xid);
-
-	req->rq_export = class_conn2export(
-		lustre_msg_get_handle(req->rq_reqmsg));
-	if (req->rq_export) {
-		rc = ptlrpc_check_req(req);
-		if (rc == 0) {
-			rc = sptlrpc_target_export_check(req->rq_export, req);
-			if (rc)
-				DEBUG_REQ(D_ERROR, req, "DROPPING req with illegal security flavor,");
-		}
-
-		if (rc)
-			goto err_req;
-	}
-
-	/* req_in handling should/must be fast */
-	if (ktime_get_real_seconds() - req->rq_arrival_time.tv_sec > 5)
-		DEBUG_REQ(D_WARNING, req, "Slow req_in handling %llds",
-			  (s64)(ktime_get_real_seconds() -
-				req->rq_arrival_time.tv_sec));
-
-	/* Set rpc server deadline and add it to the timed list */
-	deadline = (lustre_msghdr_get_flags(req->rq_reqmsg) &
-		    MSGHDR_AT_SUPPORT) ?
-		   /* The max time the client expects us to take */
-		   lustre_msg_get_timeout(req->rq_reqmsg) : obd_timeout;
-	req->rq_deadline = req->rq_arrival_time.tv_sec + deadline;
-	if (unlikely(deadline == 0)) {
-		DEBUG_REQ(D_ERROR, req, "Dropping request with 0 timeout");
-		goto err_req;
-	}
-
-	req->rq_svc_thread = thread;
-	if (thread) {
-		/* initialize request session, it is needed for request
-		 * processing by target
-		 */
-		rc = lu_context_init(&req->rq_session,
-				     LCT_SERVER_SESSION | LCT_NOREF);
-		if (rc) {
-			CERROR("%s: failure to initialize session: rc = %d\n",
-			       thread->t_name, rc);
-			goto err_req;
-		}
-		req->rq_session.lc_thread = thread;
-		lu_context_enter(&req->rq_session);
-		req->rq_svc_thread->t_env->le_ses = &req->rq_session;
-	}
-
-	ptlrpc_at_add_timed(req);
-
-	/* Move it over to the request processing queue */
-	rc = ptlrpc_server_request_add(svcpt, req);
-	if (rc)
-		goto err_req;
-
-	wake_up(&svcpt->scp_waitq);
-	return 1;
-
-err_req:
-	ptlrpc_server_finish_request(svcpt, req);
-
-	return 1;
-}
-
-/**
- * Main incoming request handling logic.
- * Calls handler function from service to do actual processing.
- */
-static int
-ptlrpc_server_handle_request(struct ptlrpc_service_part *svcpt,
-			     struct ptlrpc_thread *thread)
-{
-	struct ptlrpc_service *svc = svcpt->scp_service;
-	struct ptlrpc_request *request;
-	struct timespec64 work_start;
-	struct timespec64 work_end;
-	struct timespec64 timediff;
-	struct timespec64 arrived;
-	unsigned long timediff_usecs;
-	unsigned long arrived_usecs;
-	int fail_opc = 0;
-
-	request = ptlrpc_server_request_get(svcpt, false);
-	if (!request)
-		return 0;
-
-	if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT))
-		fail_opc = OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT;
-	else if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT))
-		fail_opc = OBD_FAIL_PTLRPC_HPREQ_TIMEOUT;
-
-	if (unlikely(fail_opc)) {
-		if (request->rq_export && request->rq_ops)
-			OBD_FAIL_TIMEOUT(fail_opc, 4);
-	}
-
-	ptlrpc_rqphase_move(request, RQ_PHASE_INTERPRET);
-
-	if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_DUMP_LOG))
-		libcfs_debug_dumplog();
-
-	ktime_get_real_ts64(&work_start);
-	timediff = timespec64_sub(work_start, request->rq_arrival_time);
-	timediff_usecs = timediff.tv_sec * USEC_PER_SEC +
-			 timediff.tv_nsec / NSEC_PER_USEC;
-	if (likely(svc->srv_stats)) {
-		lprocfs_counter_add(svc->srv_stats, PTLRPC_REQWAIT_CNTR,
-				    timediff_usecs);
-		lprocfs_counter_add(svc->srv_stats, PTLRPC_REQQDEPTH_CNTR,
-				    svcpt->scp_nreqs_incoming);
-		lprocfs_counter_add(svc->srv_stats, PTLRPC_REQACTIVE_CNTR,
-				    svcpt->scp_nreqs_active);
-		lprocfs_counter_add(svc->srv_stats, PTLRPC_TIMEOUT,
-				    at_get(&svcpt->scp_at_estimate));
-	}
-
-	if (likely(request->rq_export)) {
-		if (unlikely(ptlrpc_check_req(request)))
-			goto put_conn;
-	}
-
-	/* Discard requests queued for longer than the deadline.
-	 * The deadline is increased if we send an early reply.
-	 */
-	if (ktime_get_real_seconds() > request->rq_deadline) {
-		DEBUG_REQ(D_ERROR, request, "Dropping timed-out request from %s: deadline %lld:%llds ago\n",
-			  libcfs_id2str(request->rq_peer),
-			  request->rq_deadline -
-			  request->rq_arrival_time.tv_sec,
-			  ktime_get_real_seconds() - request->rq_deadline);
-		goto put_conn;
-	}
-
-	CDEBUG(D_RPCTRACE, "Handling RPC pname:cluuid+ref:pid:xid:nid:opc %s:%s+%d:%d:x%llu:%s:%d\n",
-	       current_comm(),
-	       (request->rq_export ?
-		(char *)request->rq_export->exp_client_uuid.uuid : "0"),
-	       (request->rq_export ?
-		atomic_read(&request->rq_export->exp_refcount) : -99),
-	       lustre_msg_get_status(request->rq_reqmsg), request->rq_xid,
-	       libcfs_id2str(request->rq_peer),
-	       lustre_msg_get_opc(request->rq_reqmsg));
-
-	if (lustre_msg_get_opc(request->rq_reqmsg) != OBD_PING)
-		CFS_FAIL_TIMEOUT_MS(OBD_FAIL_PTLRPC_PAUSE_REQ, cfs_fail_val);
-
-	CDEBUG(D_NET, "got req %llu\n", request->rq_xid);
-
-	/* re-assign request and sesson thread to the current one */
-	request->rq_svc_thread = thread;
-	if (thread) {
-		LASSERT(request->rq_session.lc_thread);
-		request->rq_session.lc_thread = thread;
-		request->rq_session.lc_cookie = 0x55;
-		thread->t_env->le_ses = &request->rq_session;
-	}
-	svc->srv_ops.so_req_handler(request);
-
-	ptlrpc_rqphase_move(request, RQ_PHASE_COMPLETE);
-
-put_conn:
-	if (unlikely(ktime_get_real_seconds() > request->rq_deadline)) {
-		DEBUG_REQ(D_WARNING, request,
-			  "Request took longer than estimated (%lld:%llds); "
-			  "client may timeout.",
-			  (s64)request->rq_deadline -
-			       request->rq_arrival_time.tv_sec,
-			  (s64)ktime_get_real_seconds() - request->rq_deadline);
-	}
-
-	ktime_get_real_ts64(&work_end);
-	timediff = timespec64_sub(work_end, work_start);
-	timediff_usecs = timediff.tv_sec * USEC_PER_SEC +
-			 timediff.tv_nsec / NSEC_PER_USEC;
-	arrived = timespec64_sub(work_end, request->rq_arrival_time);
-	arrived_usecs = arrived.tv_sec * USEC_PER_SEC +
-			 arrived.tv_nsec / NSEC_PER_USEC;
-	CDEBUG(D_RPCTRACE, "Handled RPC pname:cluuid+ref:pid:xid:nid:opc %s:%s+%d:%d:x%llu:%s:%d Request processed in %ldus (%ldus total) trans %llu rc %d/%d\n",
-	       current_comm(),
-	       (request->rq_export ?
-		(char *)request->rq_export->exp_client_uuid.uuid : "0"),
-	       (request->rq_export ?
-		atomic_read(&request->rq_export->exp_refcount) : -99),
-	       lustre_msg_get_status(request->rq_reqmsg),
-	       request->rq_xid,
-	       libcfs_id2str(request->rq_peer),
-	       lustre_msg_get_opc(request->rq_reqmsg),
-	       timediff_usecs,
-	       arrived_usecs,
-	       (request->rq_repmsg ?
-		lustre_msg_get_transno(request->rq_repmsg) :
-		request->rq_transno),
-	       request->rq_status,
-	       (request->rq_repmsg ?
-		lustre_msg_get_status(request->rq_repmsg) : -999));
-	if (likely(svc->srv_stats && request->rq_reqmsg)) {
-		__u32 op = lustre_msg_get_opc(request->rq_reqmsg);
-		int opc = opcode_offset(op);
-
-		if (opc > 0 && !(op == LDLM_ENQUEUE || op == MDS_REINT)) {
-			LASSERT(opc < LUSTRE_MAX_OPCODES);
-			lprocfs_counter_add(svc->srv_stats,
-					    opc + EXTRA_MAX_OPCODES,
-					    timediff_usecs);
-		}
-	}
-	if (unlikely(request->rq_early_count)) {
-		DEBUG_REQ(D_ADAPTTO, request,
-			  "sent %d early replies before finishing in %llds",
-			  request->rq_early_count,
-			  (s64)work_end.tv_sec -
-			  request->rq_arrival_time.tv_sec);
-	}
-
-	ptlrpc_server_finish_active_request(svcpt, request);
-
-	return 1;
-}
-
-/**
- * An internal function to process a single reply state object.
- */
-static int
-ptlrpc_handle_rs(struct ptlrpc_reply_state *rs)
-{
-	struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
-	struct ptlrpc_service *svc = svcpt->scp_service;
-	struct obd_export *exp;
-	int nlocks;
-	int been_handled;
-
-	exp = rs->rs_export;
-
-	LASSERT(rs->rs_difficult);
-	LASSERT(rs->rs_scheduled);
-	LASSERT(list_empty(&rs->rs_list));
-
-	spin_lock(&exp->exp_lock);
-	/* Noop if removed already */
-	list_del_init(&rs->rs_exp_list);
-	spin_unlock(&exp->exp_lock);
-
-	/* The disk commit callback holds exp_uncommitted_replies_lock while it
-	 * iterates over newly committed replies, removing them from
-	 * exp_uncommitted_replies.  It then drops this lock and schedules the
-	 * replies it found for handling here.
-	 *
-	 * We can avoid contention for exp_uncommitted_replies_lock between the
-	 * HRT threads and further commit callbacks by checking rs_committed
-	 * which is set in the commit callback while it holds both
-	 * rs_lock and exp_uncommitted_reples.
-	 *
-	 * If we see rs_committed clear, the commit callback _may_ not have
-	 * handled this reply yet and we race with it to grab
-	 * exp_uncommitted_replies_lock before removing the reply from
-	 * exp_uncommitted_replies.  Note that if we lose the race and the
-	 * reply has already been removed, list_del_init() is a noop.
-	 *
-	 * If we see rs_committed set, we know the commit callback is handling,
-	 * or has handled this reply since store reordering might allow us to
-	 * see rs_committed set out of sequence.  But since this is done
-	 * holding rs_lock, we can be sure it has all completed once we hold
-	 * rs_lock, which we do right next.
-	 */
-	if (!rs->rs_committed) {
-		spin_lock(&exp->exp_uncommitted_replies_lock);
-		list_del_init(&rs->rs_obd_list);
-		spin_unlock(&exp->exp_uncommitted_replies_lock);
-	}
-
-	spin_lock(&rs->rs_lock);
-
-	been_handled = rs->rs_handled;
-	rs->rs_handled = 1;
-
-	nlocks = rs->rs_nlocks;		 /* atomic "steal", but */
-	rs->rs_nlocks = 0;		      /* locks still on rs_locks! */
-
-	if (nlocks == 0 && !been_handled) {
-		/* If we see this, we should already have seen the warning
-		 * in mds_steal_ack_locks()
-		 */
-		CDEBUG(D_HA, "All locks stolen from rs %p x%lld.t%lld o%d NID %s\n",
-		       rs,
-		       rs->rs_xid, rs->rs_transno, rs->rs_opc,
-		       libcfs_nid2str(exp->exp_connection->c_peer.nid));
-	}
-
-	if ((!been_handled && rs->rs_on_net) || nlocks > 0) {
-		spin_unlock(&rs->rs_lock);
-
-		if (!been_handled && rs->rs_on_net) {
-			LNetMDUnlink(rs->rs_md_h);
-			/* Ignore return code; we're racing with completion */
-		}
-
-		while (nlocks-- > 0)
-			ldlm_lock_decref(&rs->rs_locks[nlocks],
-					 rs->rs_modes[nlocks]);
-
-		spin_lock(&rs->rs_lock);
-	}
-
-	rs->rs_scheduled = 0;
-
-	if (!rs->rs_on_net) {
-		/* Off the net */
-		spin_unlock(&rs->rs_lock);
-
-		class_export_put(exp);
-		rs->rs_export = NULL;
-		ptlrpc_rs_decref(rs);
-		if (atomic_dec_and_test(&svcpt->scp_nreps_difficult) &&
-		    svc->srv_is_stopping)
-			wake_up_all(&svcpt->scp_waitq);
-		return 1;
-	}
-
-	/* still on the net; callback will schedule */
-	spin_unlock(&rs->rs_lock);
-	return 1;
-}
-
-static void
-ptlrpc_check_rqbd_pool(struct ptlrpc_service_part *svcpt)
-{
-	int avail = svcpt->scp_nrqbds_posted;
-	int low_water = test_req_buffer_pressure ? 0 :
-			svcpt->scp_service->srv_nbuf_per_group / 2;
-
-	/* NB I'm not locking; just looking. */
-
-	/* CAVEAT EMPTOR: We might be allocating buffers here because we've
-	 * allowed the request history to grow out of control.  We could put a
-	 * sanity check on that here and cull some history if we need the
-	 * space.
-	 */
-
-	if (avail <= low_water)
-		ptlrpc_grow_req_bufs(svcpt, 1);
-
-	if (svcpt->scp_service->srv_stats) {
-		lprocfs_counter_add(svcpt->scp_service->srv_stats,
-				    PTLRPC_REQBUF_AVAIL_CNTR, avail);
-	}
-}
-
-static inline int
-ptlrpc_threads_enough(struct ptlrpc_service_part *svcpt)
-{
-	return svcpt->scp_nreqs_active <
-	       svcpt->scp_nthrs_running - 1 -
-	       (svcpt->scp_service->srv_ops.so_hpreq_handler != NULL);
-}
-
-/**
- * allowed to create more threads
- * user can call it w/o any lock but need to hold
- * ptlrpc_service_part::scp_lock to get reliable result
- */
-static inline int
-ptlrpc_threads_increasable(struct ptlrpc_service_part *svcpt)
-{
-	return svcpt->scp_nthrs_running +
-	       svcpt->scp_nthrs_starting <
-	       svcpt->scp_service->srv_nthrs_cpt_limit;
-}
-
-/**
- * too many requests and allowed to create more threads
- */
-static inline int
-ptlrpc_threads_need_create(struct ptlrpc_service_part *svcpt)
-{
-	return !ptlrpc_threads_enough(svcpt) &&
-		ptlrpc_threads_increasable(svcpt);
-}
-
-static inline int
-ptlrpc_thread_stopping(struct ptlrpc_thread *thread)
-{
-	return thread_is_stopping(thread) ||
-	       thread->t_svcpt->scp_service->srv_is_stopping;
-}
-
-static inline int
-ptlrpc_rqbd_pending(struct ptlrpc_service_part *svcpt)
-{
-	return !list_empty(&svcpt->scp_rqbd_idle) &&
-	       svcpt->scp_rqbd_timeout == 0;
-}
-
-static inline int
-ptlrpc_at_check(struct ptlrpc_service_part *svcpt)
-{
-	return svcpt->scp_at_check;
-}
-
-/**
- * requests wait on preprocessing
- * user can call it w/o any lock but need to hold
- * ptlrpc_service_part::scp_lock to get reliable result
- */
-static inline int
-ptlrpc_server_request_incoming(struct ptlrpc_service_part *svcpt)
-{
-	return !list_empty(&svcpt->scp_req_incoming);
-}
-
-/* We perfer lifo queuing, but kernel doesn't provide that yet. */
-#ifndef wait_event_idle_exclusive_lifo
-#define wait_event_idle_exclusive_lifo wait_event_idle_exclusive
-#define wait_event_idle_exclusive_lifo_timeout wait_event_idle_exclusive_timeout
-#endif
-
-static __attribute__((__noinline__)) int
-ptlrpc_wait_event(struct ptlrpc_service_part *svcpt,
-		  struct ptlrpc_thread *thread)
-{
-	/* Don't exit while there are replies to be handled */
-
-	/* XXX: Add this back when libcfs watchdog is merged upstream
-	lc_watchdog_disable(thread->t_watchdog);
-	 */
-
-	cond_resched();
-
-	if (svcpt->scp_rqbd_timeout == 0)
-		wait_event_idle_exclusive_lifo(
-			svcpt->scp_waitq,
-			ptlrpc_thread_stopping(thread) ||
-			ptlrpc_server_request_incoming(svcpt) ||
-			ptlrpc_server_request_pending(svcpt,
-						      false) ||
-			ptlrpc_rqbd_pending(svcpt) ||
-			ptlrpc_at_check(svcpt));
-	else if (0 == wait_event_idle_exclusive_lifo_timeout(
-			 svcpt->scp_waitq,
-			 ptlrpc_thread_stopping(thread) ||
-			 ptlrpc_server_request_incoming(svcpt) ||
-			 ptlrpc_server_request_pending(svcpt,
-						       false) ||
-			 ptlrpc_rqbd_pending(svcpt) ||
-			 ptlrpc_at_check(svcpt),
-			 svcpt->scp_rqbd_timeout))
-		svcpt->scp_rqbd_timeout = 0;
-
-	if (ptlrpc_thread_stopping(thread))
-		return -EINTR;
-
-	/*
-	lc_watchdog_touch(thread->t_watchdog,
-			  ptlrpc_server_get_timeout(svcpt));
-	 */
-	return 0;
-}
-
-/**
- * Main thread body for service threads.
- * Waits in a loop waiting for new requests to process to appear.
- * Every time an incoming requests is added to its queue, a waitq
- * is woken up and one of the threads will handle it.
- */
-static int ptlrpc_main(void *arg)
-{
-	struct ptlrpc_thread *thread = arg;
-	struct ptlrpc_service_part *svcpt = thread->t_svcpt;
-	struct ptlrpc_service *svc = svcpt->scp_service;
-	struct ptlrpc_reply_state *rs;
-	struct group_info *ginfo = NULL;
-	struct lu_env *env;
-	int counter = 0, rc = 0;
-
-	thread->t_pid = current_pid();
-	unshare_fs_struct();
-
-	/* NB: we will call cfs_cpt_bind() for all threads, because we
-	 * might want to run lustre server only on a subset of system CPUs,
-	 * in that case ->scp_cpt is CFS_CPT_ANY
-	 */
-	rc = cfs_cpt_bind(svc->srv_cptable, svcpt->scp_cpt);
-	if (rc != 0) {
-		CWARN("%s: failed to bind %s on CPT %d\n",
-		      svc->srv_name, thread->t_name, svcpt->scp_cpt);
-	}
-
-	ginfo = groups_alloc(0);
-	if (!ginfo) {
-		rc = -ENOMEM;
-		goto out;
-	}
-
-	set_current_groups(ginfo);
-	put_group_info(ginfo);
-
-	if (svc->srv_ops.so_thr_init) {
-		rc = svc->srv_ops.so_thr_init(thread);
-		if (rc)
-			goto out;
-	}
-
-	env = kzalloc(sizeof(*env), GFP_KERNEL);
-	if (!env) {
-		rc = -ENOMEM;
-		goto out_srv_fini;
-	}
-
-	rc = lu_context_init(&env->le_ctx,
-			     svc->srv_ctx_tags | LCT_REMEMBER | LCT_NOREF);
-	if (rc)
-		goto out_srv_fini;
-
-	thread->t_env = env;
-	env->le_ctx.lc_thread = thread;
-	env->le_ctx.lc_cookie = 0x6;
-
-	while (!list_empty(&svcpt->scp_rqbd_idle)) {
-		rc = ptlrpc_server_post_idle_rqbds(svcpt);
-		if (rc >= 0)
-			continue;
-
-		CERROR("Failed to post rqbd for %s on CPT %d: %d\n",
-		       svc->srv_name, svcpt->scp_cpt, rc);
-		goto out_srv_fini;
-	}
-
-	/* Alloc reply state structure for this one */
-	rs = kvzalloc(svc->srv_max_reply_size, GFP_KERNEL);
-	if (!rs) {
-		rc = -ENOMEM;
-		goto out_srv_fini;
-	}
-
-	spin_lock(&svcpt->scp_lock);
-
-	LASSERT(thread_is_starting(thread));
-	thread_clear_flags(thread, SVC_STARTING);
-
-	LASSERT(svcpt->scp_nthrs_starting == 1);
-	svcpt->scp_nthrs_starting--;
-
-	/* SVC_STOPPING may already be set here if someone else is trying
-	 * to stop the service while this new thread has been dynamically
-	 * forked. We still set SVC_RUNNING to let our creator know that
-	 * we are now running, however we will exit as soon as possible
-	 */
-	thread_add_flags(thread, SVC_RUNNING);
-	svcpt->scp_nthrs_running++;
-	spin_unlock(&svcpt->scp_lock);
-
-	/* wake up our creator in case he's still waiting. */
-	wake_up(&thread->t_ctl_waitq);
-
-	/*
-	thread->t_watchdog = lc_watchdog_add(ptlrpc_server_get_timeout(svcpt),
-					     NULL, NULL);
-	 */
-
-	spin_lock(&svcpt->scp_rep_lock);
-	list_add(&rs->rs_list, &svcpt->scp_rep_idle);
-	wake_up(&svcpt->scp_rep_waitq);
-	spin_unlock(&svcpt->scp_rep_lock);
-
-	CDEBUG(D_NET, "service thread %d (#%d) started\n", thread->t_id,
-	       svcpt->scp_nthrs_running);
-
-	/* XXX maintain a list of all managed devices: insert here */
-	while (!ptlrpc_thread_stopping(thread)) {
-		if (ptlrpc_wait_event(svcpt, thread))
-			break;
-
-		ptlrpc_check_rqbd_pool(svcpt);
-
-		if (ptlrpc_threads_need_create(svcpt)) {
-			/* Ignore return code - we tried... */
-			ptlrpc_start_thread(svcpt, 0);
-		}
-
-		/* Process all incoming reqs before handling any */
-		if (ptlrpc_server_request_incoming(svcpt)) {
-			lu_context_enter(&env->le_ctx);
-			env->le_ses = NULL;
-			ptlrpc_server_handle_req_in(svcpt, thread);
-			lu_context_exit(&env->le_ctx);
-
-			/* but limit ourselves in case of flood */
-			if (counter++ < 100)
-				continue;
-			counter = 0;
-		}
-
-		if (ptlrpc_at_check(svcpt))
-			ptlrpc_at_check_timed(svcpt);
-
-		if (ptlrpc_server_request_pending(svcpt, false)) {
-			lu_context_enter(&env->le_ctx);
-			ptlrpc_server_handle_request(svcpt, thread);
-			lu_context_exit(&env->le_ctx);
-		}
-
-		if (ptlrpc_rqbd_pending(svcpt) &&
-		    ptlrpc_server_post_idle_rqbds(svcpt) < 0) {
-			/* I just failed to repost request buffers.
-			 * Wait for a timeout (unless something else
-			 * happens) before I try again
-			 */
-			svcpt->scp_rqbd_timeout = HZ / 10;
-			CDEBUG(D_RPCTRACE, "Posted buffers: %d\n",
-			       svcpt->scp_nrqbds_posted);
-		}
-	}
-
-	/*
-	lc_watchdog_delete(thread->t_watchdog);
-	thread->t_watchdog = NULL;
-	*/
-
-out_srv_fini:
-	/*
-	 * deconstruct service specific state created by ptlrpc_start_thread()
-	 */
-	if (svc->srv_ops.so_thr_done)
-		svc->srv_ops.so_thr_done(thread);
-
-	if (env) {
-		lu_context_fini(&env->le_ctx);
-		kfree(env);
-	}
-out:
-	CDEBUG(D_RPCTRACE, "service thread [ %p : %u ] %d exiting: rc %d\n",
-	       thread, thread->t_pid, thread->t_id, rc);
-
-	spin_lock(&svcpt->scp_lock);
-	if (thread_test_and_clear_flags(thread, SVC_STARTING))
-		svcpt->scp_nthrs_starting--;
-
-	if (thread_test_and_clear_flags(thread, SVC_RUNNING)) {
-		/* must know immediately */
-		svcpt->scp_nthrs_running--;
-	}
-
-	thread->t_id = rc;
-	thread_add_flags(thread, SVC_STOPPED);
-
-	wake_up(&thread->t_ctl_waitq);
-	spin_unlock(&svcpt->scp_lock);
-
-	return rc;
-}
-
-static int hrt_dont_sleep(struct ptlrpc_hr_thread *hrt,
-			  struct list_head *replies)
-{
-	int result;
-
-	spin_lock(&hrt->hrt_lock);
-
-	list_splice_init(&hrt->hrt_queue, replies);
-	result = ptlrpc_hr.hr_stopping || !list_empty(replies);
-
-	spin_unlock(&hrt->hrt_lock);
-	return result;
-}
-
-/**
- * Main body of "handle reply" function.
- * It processes acked reply states
- */
-static int ptlrpc_hr_main(void *arg)
-{
-	struct ptlrpc_hr_thread	*hrt = arg;
-	struct ptlrpc_hr_partition *hrp = hrt->hrt_partition;
-	LIST_HEAD(replies);
-	char threadname[20];
-	int rc;
-
-	snprintf(threadname, sizeof(threadname), "ptlrpc_hr%02d_%03d",
-		 hrp->hrp_cpt, hrt->hrt_id);
-	unshare_fs_struct();
-
-	rc = cfs_cpt_bind(ptlrpc_hr.hr_cpt_table, hrp->hrp_cpt);
-	if (rc != 0) {
-		CWARN("Failed to bind %s on CPT %d of CPT table %p: rc = %d\n",
-		      threadname, hrp->hrp_cpt, ptlrpc_hr.hr_cpt_table, rc);
-	}
-
-	atomic_inc(&hrp->hrp_nstarted);
-	wake_up(&ptlrpc_hr.hr_waitq);
-
-	while (!ptlrpc_hr.hr_stopping) {
-		wait_event_idle(hrt->hrt_waitq, hrt_dont_sleep(hrt, &replies));
-
-		while (!list_empty(&replies)) {
-			struct ptlrpc_reply_state *rs;
-
-			rs = list_entry(replies.prev, struct ptlrpc_reply_state,
-					rs_list);
-			list_del_init(&rs->rs_list);
-			ptlrpc_handle_rs(rs);
-		}
-	}
-
-	atomic_inc(&hrp->hrp_nstopped);
-	wake_up(&ptlrpc_hr.hr_waitq);
-
-	return 0;
-}
-
-static void ptlrpc_stop_hr_threads(void)
-{
-	struct ptlrpc_hr_partition *hrp;
-	int i;
-	int j;
-
-	ptlrpc_hr.hr_stopping = 1;
-
-	cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
-		if (!hrp->hrp_thrs)
-			continue; /* uninitialized */
-		for (j = 0; j < hrp->hrp_nthrs; j++)
-			wake_up_all(&hrp->hrp_thrs[j].hrt_waitq);
-	}
-
-	cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
-		if (!hrp->hrp_thrs)
-			continue; /* uninitialized */
-		wait_event(ptlrpc_hr.hr_waitq,
-			   atomic_read(&hrp->hrp_nstopped) ==
-			   atomic_read(&hrp->hrp_nstarted));
-	}
-}
-
-static int ptlrpc_start_hr_threads(void)
-{
-	struct ptlrpc_hr_partition *hrp;
-	int i;
-	int j;
-
-	cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
-		int rc = 0;
-
-		for (j = 0; j < hrp->hrp_nthrs; j++) {
-			struct	ptlrpc_hr_thread *hrt = &hrp->hrp_thrs[j];
-			struct task_struct *task;
-
-			task = kthread_run(ptlrpc_hr_main,
-					   &hrp->hrp_thrs[j],
-					   "ptlrpc_hr%02d_%03d",
-					   hrp->hrp_cpt, hrt->hrt_id);
-			if (IS_ERR(task)) {
-				rc = PTR_ERR(task);
-				break;
-			}
-		}
-		wait_event(ptlrpc_hr.hr_waitq,
-			   atomic_read(&hrp->hrp_nstarted) == j);
-
-		if (rc < 0) {
-			CERROR("cannot start reply handler thread %d:%d: rc = %d\n",
-			       i, j, rc);
-			ptlrpc_stop_hr_threads();
-			return rc;
-		}
-	}
-	return 0;
-}
-
-static void ptlrpc_svcpt_stop_threads(struct ptlrpc_service_part *svcpt)
-{
-	struct ptlrpc_thread *thread;
-	LIST_HEAD(zombie);
-
-	CDEBUG(D_INFO, "Stopping threads for service %s\n",
-	       svcpt->scp_service->srv_name);
-
-	spin_lock(&svcpt->scp_lock);
-	/* let the thread know that we would like it to stop asap */
-	list_for_each_entry(thread, &svcpt->scp_threads, t_link) {
-		CDEBUG(D_INFO, "Stopping thread %s #%u\n",
-		       svcpt->scp_service->srv_thread_name, thread->t_id);
-		thread_add_flags(thread, SVC_STOPPING);
-	}
-
-	wake_up_all(&svcpt->scp_waitq);
-
-	while (!list_empty(&svcpt->scp_threads)) {
-		thread = list_entry(svcpt->scp_threads.next,
-				    struct ptlrpc_thread, t_link);
-		if (thread_is_stopped(thread)) {
-			list_del(&thread->t_link);
-			list_add(&thread->t_link, &zombie);
-			continue;
-		}
-		spin_unlock(&svcpt->scp_lock);
-
-		CDEBUG(D_INFO, "waiting for stopping-thread %s #%u\n",
-		       svcpt->scp_service->srv_thread_name, thread->t_id);
-		wait_event_idle(thread->t_ctl_waitq,
-				thread_is_stopped(thread));
-
-		spin_lock(&svcpt->scp_lock);
-	}
-
-	spin_unlock(&svcpt->scp_lock);
-
-	while (!list_empty(&zombie)) {
-		thread = list_entry(zombie.next,
-				    struct ptlrpc_thread, t_link);
-		list_del(&thread->t_link);
-		kfree(thread);
-	}
-}
-
-/**
- * Stops all threads of a particular service \a svc
- */
-static void ptlrpc_stop_all_threads(struct ptlrpc_service *svc)
-{
-	struct ptlrpc_service_part *svcpt;
-	int i;
-
-	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service)
-			ptlrpc_svcpt_stop_threads(svcpt);
-	}
-}
-
-int ptlrpc_start_threads(struct ptlrpc_service *svc)
-{
-	int rc = 0;
-	int i;
-	int j;
-
-	/* We require 2 threads min, see note in ptlrpc_server_handle_request */
-	LASSERT(svc->srv_nthrs_cpt_init >= PTLRPC_NTHRS_INIT);
-
-	for (i = 0; i < svc->srv_ncpts; i++) {
-		for (j = 0; j < svc->srv_nthrs_cpt_init; j++) {
-			rc = ptlrpc_start_thread(svc->srv_parts[i], 1);
-			if (rc == 0)
-				continue;
-
-			if (rc != -EMFILE)
-				goto failed;
-			/* We have enough threads, don't start more. b=15759 */
-			break;
-		}
-	}
-
-	return 0;
- failed:
-	CERROR("cannot start %s thread #%d_%d: rc %d\n",
-	       svc->srv_thread_name, i, j, rc);
-	ptlrpc_stop_all_threads(svc);
-	return rc;
-}
-
-int ptlrpc_start_thread(struct ptlrpc_service_part *svcpt, int wait)
-{
-	struct ptlrpc_thread *thread;
-	struct ptlrpc_service *svc;
-	struct task_struct *task;
-	int rc;
-
-	svc = svcpt->scp_service;
-
-	CDEBUG(D_RPCTRACE, "%s[%d] started %d min %d max %d\n",
-	       svc->srv_name, svcpt->scp_cpt, svcpt->scp_nthrs_running,
-	       svc->srv_nthrs_cpt_init, svc->srv_nthrs_cpt_limit);
-
- again:
-	if (unlikely(svc->srv_is_stopping))
-		return -ESRCH;
-
-	if (!ptlrpc_threads_increasable(svcpt) ||
-	    (OBD_FAIL_CHECK(OBD_FAIL_TGT_TOOMANY_THREADS) &&
-	     svcpt->scp_nthrs_running == svc->srv_nthrs_cpt_init - 1))
-		return -EMFILE;
-
-	thread = kzalloc_node(sizeof(*thread), GFP_NOFS,
-			      cfs_cpt_spread_node(svc->srv_cptable,
-						  svcpt->scp_cpt));
-	if (!thread)
-		return -ENOMEM;
-	init_waitqueue_head(&thread->t_ctl_waitq);
-
-	spin_lock(&svcpt->scp_lock);
-	if (!ptlrpc_threads_increasable(svcpt)) {
-		spin_unlock(&svcpt->scp_lock);
-		kfree(thread);
-		return -EMFILE;
-	}
-
-	if (svcpt->scp_nthrs_starting != 0) {
-		/* serialize starting because some modules (obdfilter)
-		 * might require unique and contiguous t_id
-		 */
-		LASSERT(svcpt->scp_nthrs_starting == 1);
-		spin_unlock(&svcpt->scp_lock);
-		kfree(thread);
-		if (wait) {
-			CDEBUG(D_INFO, "Waiting for creating thread %s #%d\n",
-			       svc->srv_thread_name, svcpt->scp_thr_nextid);
-			schedule();
-			goto again;
-		}
-
-		CDEBUG(D_INFO, "Creating thread %s #%d race, retry later\n",
-		       svc->srv_thread_name, svcpt->scp_thr_nextid);
-		return -EAGAIN;
-	}
-
-	svcpt->scp_nthrs_starting++;
-	thread->t_id = svcpt->scp_thr_nextid++;
-	thread_add_flags(thread, SVC_STARTING);
-	thread->t_svcpt = svcpt;
-
-	list_add(&thread->t_link, &svcpt->scp_threads);
-	spin_unlock(&svcpt->scp_lock);
-
-	if (svcpt->scp_cpt >= 0) {
-		snprintf(thread->t_name, sizeof(thread->t_name), "%s%02d_%03d",
-			 svc->srv_thread_name, svcpt->scp_cpt, thread->t_id);
-	} else {
-		snprintf(thread->t_name, sizeof(thread->t_name), "%s_%04d",
-			 svc->srv_thread_name, thread->t_id);
-	}
-
-	CDEBUG(D_RPCTRACE, "starting thread '%s'\n", thread->t_name);
-	task = kthread_run(ptlrpc_main, thread, "%s", thread->t_name);
-	if (IS_ERR(task)) {
-		rc = PTR_ERR(task);
-		CERROR("cannot start thread '%s': rc = %d\n",
-		       thread->t_name, rc);
-		spin_lock(&svcpt->scp_lock);
-		--svcpt->scp_nthrs_starting;
-		if (thread_is_stopping(thread)) {
-			/* this ptlrpc_thread is being handled
-			 * by ptlrpc_svcpt_stop_threads now
-			 */
-			thread_add_flags(thread, SVC_STOPPED);
-			wake_up(&thread->t_ctl_waitq);
-			spin_unlock(&svcpt->scp_lock);
-		} else {
-			list_del(&thread->t_link);
-			spin_unlock(&svcpt->scp_lock);
-			kfree(thread);
-		}
-		return rc;
-	}
-
-	if (!wait)
-		return 0;
-
-	wait_event_idle(thread->t_ctl_waitq,
-			thread_is_running(thread) || thread_is_stopped(thread));
-
-	rc = thread_is_stopped(thread) ? thread->t_id : 0;
-	return rc;
-}
-
-int ptlrpc_hr_init(void)
-{
-	struct ptlrpc_hr_partition *hrp;
-	struct ptlrpc_hr_thread	*hrt;
-	int rc;
-	int i;
-	int j;
-	int weight;
-
-	memset(&ptlrpc_hr, 0, sizeof(ptlrpc_hr));
-	ptlrpc_hr.hr_cpt_table = cfs_cpt_table;
-
-	ptlrpc_hr.hr_partitions = cfs_percpt_alloc(ptlrpc_hr.hr_cpt_table,
-						   sizeof(*hrp));
-	if (!ptlrpc_hr.hr_partitions)
-		return -ENOMEM;
-
-	init_waitqueue_head(&ptlrpc_hr.hr_waitq);
-
-	weight = cpumask_weight(topology_sibling_cpumask(0));
-
-	cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
-		hrp->hrp_cpt = i;
-
-		atomic_set(&hrp->hrp_nstarted, 0);
-		atomic_set(&hrp->hrp_nstopped, 0);
-
-		hrp->hrp_nthrs = cfs_cpt_weight(ptlrpc_hr.hr_cpt_table, i);
-		hrp->hrp_nthrs /= weight;
-		if (hrp->hrp_nthrs == 0)
-			hrp->hrp_nthrs = 1;
-
-		hrp->hrp_thrs =
-			kzalloc_node(hrp->hrp_nthrs * sizeof(*hrt), GFP_NOFS,
-				     cfs_cpt_spread_node(ptlrpc_hr.hr_cpt_table,
-							 i));
-		if (!hrp->hrp_thrs) {
-			rc = -ENOMEM;
-			goto out;
-		}
-
-		for (j = 0; j < hrp->hrp_nthrs; j++) {
-			hrt = &hrp->hrp_thrs[j];
-
-			hrt->hrt_id = j;
-			hrt->hrt_partition = hrp;
-			init_waitqueue_head(&hrt->hrt_waitq);
-			spin_lock_init(&hrt->hrt_lock);
-			INIT_LIST_HEAD(&hrt->hrt_queue);
-		}
-	}
-
-	rc = ptlrpc_start_hr_threads();
-out:
-	if (rc != 0)
-		ptlrpc_hr_fini();
-	return rc;
-}
-
-void ptlrpc_hr_fini(void)
-{
-	struct ptlrpc_hr_partition *hrp;
-	int i;
-
-	if (!ptlrpc_hr.hr_partitions)
-		return;
-
-	ptlrpc_stop_hr_threads();
-
-	cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
-		kfree(hrp->hrp_thrs);
-	}
-
-	cfs_percpt_free(ptlrpc_hr.hr_partitions);
-	ptlrpc_hr.hr_partitions = NULL;
-}
-
-/**
- * Wait until all already scheduled replies are processed.
- */
-static void ptlrpc_wait_replies(struct ptlrpc_service_part *svcpt)
-{
-	while (1) {
-		int rc;
-
-		rc = wait_event_idle_timeout(
-			svcpt->scp_waitq,
-			atomic_read(&svcpt->scp_nreps_difficult) == 0,
-			10 * HZ);
-		if (rc > 0)
-			break;
-		CWARN("Unexpectedly long timeout %s %p\n",
-		      svcpt->scp_service->srv_name, svcpt->scp_service);
-	}
-}
-
-static void
-ptlrpc_service_del_atimer(struct ptlrpc_service *svc)
-{
-	struct ptlrpc_service_part *svcpt;
-	int i;
-
-	/* early disarm AT timer... */
-	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (svcpt->scp_service)
-			del_timer(&svcpt->scp_at_timer);
-	}
-}
-
-static void
-ptlrpc_service_unlink_rqbd(struct ptlrpc_service *svc)
-{
-	struct ptlrpc_service_part *svcpt;
-	struct ptlrpc_request_buffer_desc *rqbd;
-	int cnt;
-	int rc;
-	int i;
-
-	/* All history will be culled when the next request buffer is
-	 * freed in ptlrpc_service_purge_all()
-	 */
-	svc->srv_hist_nrqbds_cpt_max = 0;
-
-	rc = LNetClearLazyPortal(svc->srv_req_portal);
-	LASSERT(rc == 0);
-
-	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (!svcpt->scp_service)
-			break;
-
-		/* Unlink all the request buffers.  This forces a 'final'
-		 * event with its 'unlink' flag set for each posted rqbd
-		 */
-		list_for_each_entry(rqbd, &svcpt->scp_rqbd_posted,
-				    rqbd_list) {
-			rc = LNetMDUnlink(rqbd->rqbd_md_h);
-			LASSERT(rc == 0 || rc == -ENOENT);
-		}
-	}
-
-	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (!svcpt->scp_service)
-			break;
-
-		/* Wait for the network to release any buffers
-		 * it's currently filling
-		 */
-		spin_lock(&svcpt->scp_lock);
-		while (svcpt->scp_nrqbds_posted != 0) {
-			spin_unlock(&svcpt->scp_lock);
-			/* Network access will complete in finite time but
-			 * the HUGE timeout lets us CWARN for visibility
-			 * of sluggish LNDs
-			 */
-			cnt = 0;
-			while (cnt < LONG_UNLINK &&
-			       (rc = wait_event_idle_timeout(svcpt->scp_waitq,
-							     svcpt->scp_nrqbds_posted == 0,
-							     HZ)) == 0)
-				cnt++;
-			if (rc == 0) {
-				CWARN("Service %s waiting for request buffers\n",
-				      svcpt->scp_service->srv_name);
-			}
-			spin_lock(&svcpt->scp_lock);
-		}
-		spin_unlock(&svcpt->scp_lock);
-	}
-}
-
-static void
-ptlrpc_service_purge_all(struct ptlrpc_service *svc)
-{
-	struct ptlrpc_service_part *svcpt;
-	struct ptlrpc_request_buffer_desc *rqbd;
-	struct ptlrpc_request *req;
-	struct ptlrpc_reply_state *rs;
-	int i;
-
-	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (!svcpt->scp_service)
-			break;
-
-		spin_lock(&svcpt->scp_rep_lock);
-		while (!list_empty(&svcpt->scp_rep_active)) {
-			rs = list_entry(svcpt->scp_rep_active.next,
-					struct ptlrpc_reply_state, rs_list);
-			spin_lock(&rs->rs_lock);
-			ptlrpc_schedule_difficult_reply(rs);
-			spin_unlock(&rs->rs_lock);
-		}
-		spin_unlock(&svcpt->scp_rep_lock);
-
-		/* purge the request queue.  NB No new replies (rqbds
-		 * all unlinked) and no service threads, so I'm the only
-		 * thread noodling the request queue now
-		 */
-		while (!list_empty(&svcpt->scp_req_incoming)) {
-			req = list_entry(svcpt->scp_req_incoming.next,
-					 struct ptlrpc_request, rq_list);
-
-			list_del(&req->rq_list);
-			svcpt->scp_nreqs_incoming--;
-			ptlrpc_server_finish_request(svcpt, req);
-		}
-
-		while (ptlrpc_server_request_pending(svcpt, true)) {
-			req = ptlrpc_server_request_get(svcpt, true);
-			ptlrpc_server_finish_active_request(svcpt, req);
-		}
-
-		LASSERT(list_empty(&svcpt->scp_rqbd_posted));
-		LASSERT(svcpt->scp_nreqs_incoming == 0);
-		LASSERT(svcpt->scp_nreqs_active == 0);
-		/* history should have been culled by
-		 * ptlrpc_server_finish_request
-		 */
-		LASSERT(svcpt->scp_hist_nrqbds == 0);
-
-		/* Now free all the request buffers since nothing
-		 * references them any more...
-		 */
-
-		while (!list_empty(&svcpt->scp_rqbd_idle)) {
-			rqbd = list_entry(svcpt->scp_rqbd_idle.next,
-					  struct ptlrpc_request_buffer_desc,
-					  rqbd_list);
-			ptlrpc_free_rqbd(rqbd);
-		}
-		ptlrpc_wait_replies(svcpt);
-
-		while (!list_empty(&svcpt->scp_rep_idle)) {
-			rs = list_entry(svcpt->scp_rep_idle.next,
-					struct ptlrpc_reply_state,
-					rs_list);
-			list_del(&rs->rs_list);
-			kvfree(rs);
-		}
-	}
-}
-
-static void
-ptlrpc_service_free(struct ptlrpc_service *svc)
-{
-	struct ptlrpc_service_part *svcpt;
-	struct ptlrpc_at_array *array;
-	int i;
-
-	ptlrpc_service_for_each_part(svcpt, i, svc) {
-		if (!svcpt->scp_service)
-			break;
-
-		/* In case somebody rearmed this in the meantime */
-		del_timer(&svcpt->scp_at_timer);
-		array = &svcpt->scp_at_array;
-
-		kfree(array->paa_reqs_array);
-		array->paa_reqs_array = NULL;
-		kfree(array->paa_reqs_count);
-		array->paa_reqs_count = NULL;
-	}
-
-	ptlrpc_service_for_each_part(svcpt, i, svc)
-		kfree(svcpt);
-
-	if (svc->srv_cpts)
-		cfs_expr_list_values_free(svc->srv_cpts, svc->srv_ncpts);
-
-	kfree(svc);
-}
-
-int ptlrpc_unregister_service(struct ptlrpc_service *service)
-{
-	CDEBUG(D_NET, "%s: tearing down\n", service->srv_name);
-
-	service->srv_is_stopping = 1;
-
-	mutex_lock(&ptlrpc_all_services_mutex);
-	list_del_init(&service->srv_list);
-	mutex_unlock(&ptlrpc_all_services_mutex);
-
-	ptlrpc_service_del_atimer(service);
-	ptlrpc_stop_all_threads(service);
-
-	ptlrpc_service_unlink_rqbd(service);
-	ptlrpc_service_purge_all(service);
-	ptlrpc_service_nrs_cleanup(service);
-
-	ptlrpc_lprocfs_unregister_service(service);
-	ptlrpc_sysfs_unregister_service(service);
-
-	ptlrpc_service_free(service);
-
-	return 0;
-}
-EXPORT_SYMBOL(ptlrpc_unregister_service);