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| author |   Chuck Lever <chuck.lever@oracle.com> | 2015-12-16 17:23:20 -0500 |
|---|---|---|
| committer |   Anna Schumaker <Anna.Schumaker@Netapp.com> | 2015-12-18 15:34:33 -0500 |
| commit | 26ae9d1c5af1b1d669ca1c28fc02bbca3d778d45 (patch) | |
| tree | d3bc75de097cbb8e9de3325a6e2bd80230c744a2 /net/sunrpc/xprtrdma | |
| parent | xprtrdma: Invalidate in the RPC reply handler (diff) | |
| download | linux-dev-26ae9d1c5af1b1d669ca1c28fc02bbca3d778d45.tar.xz linux-dev-26ae9d1c5af1b1d669ca1c28fc02bbca3d778d45.zip | |
xprtrdma: Revert commit e7104a2a9606 ('xprtrdma: Cap req_cqinit').
The root of the problem was that sends (especially unsignalled
FASTREG and LOCAL_INV Work Requests) were not properly flow-
controlled, which allowed a send queue overrun.
Now that the RPC/RDMA reply handler waits for invalidation to
complete, the send queue is properly flow-controlled. Thus this
limit is no longer necessary.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Devesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma')
| -rw-r--r-- | net/sunrpc/xprtrdma/verbs.c | 6 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/xprt_rdma.h | 6 |
2 files changed, 2 insertions, 10 deletions
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 003630733ef3..732c71ce5dca 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -616,10 +616,8 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, /* set trigger for requesting send completion */ ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 - 1; - if (ep->rep_cqinit > RPCRDMA_MAX_UNSIGNALED_SENDS) - ep->rep_cqinit = RPCRDMA_MAX_UNSIGNALED_SENDS; - else if (ep->rep_cqinit <= 2) - ep->rep_cqinit = 0; + if (ep->rep_cqinit <= 2) + ep->rep_cqinit = 0; /* always signal? */ INIT_CQCOUNT(ep); init_waitqueue_head(&ep->rep_connect_wait); INIT_DELAYED_WORK(&ep->rep_connect_worker, rpcrdma_connect_worker); diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index ddae4909982b..728101ddc44b 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -88,12 +88,6 @@ struct rpcrdma_ep { struct delayed_work rep_connect_worker; }; -/* - * Force a signaled SEND Work Request every so often, - * in case the provider needs to do some housekeeping. - */ -#define RPCRDMA_MAX_UNSIGNALED_SENDS (32) - #define INIT_CQCOUNT(ep) atomic_set(&(ep)->rep_cqcount, (ep)->rep_cqinit) #define DECR_CQCOUNT(ep) atomic_sub_return(1, &(ep)->rep_cqcount) |