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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-09-24 09:51:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-09-24 09:51:50 -0700 |
| commit | 02f130a7872d26bd6ceb4e86b531761d79ac76b7 (patch) | |
| tree | 735bb50640f87d95fd67cd869bc6c46d46201244 /include | |
| parent | Merge tag 'pci-v3.17-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci (diff) | |
| parent | blk-mq, percpu_ref: implement a kludge for SCSI blk-mq stall during probe (diff) | |
| download | linux-dev-02f130a7872d26bd6ceb4e86b531761d79ac76b7.tar.xz linux-dev-02f130a7872d26bd6ceb4e86b531761d79ac76b7.zip | |
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull one last block fix from Jens Axboe:
"We've had an issue with scsi-mq where probing takes forever. This was
bisected down to the percpu changes for blk_mq_queue_enter(), and the
fact we now suffer an RCU grace period when killing a queue. SCSI
creates and destroys tons of queues, so this let to 10s of seconds of
stalls at boot for some.
Tejun has a real fix for this, but it's too involved for 3.17. So
this is a temporary workaround to expedite the queue killing until we
can fold in the real fix for 3.18 when that merge window opens"
* 'for-linus' of git://git.kernel.dk/linux-block:
blk-mq, percpu_ref: implement a kludge for SCSI blk-mq stall during probe
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/percpu-refcount.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h index 3dfbf237cd8f..ef5894ca8e50 100644 --- a/include/linux/percpu-refcount.h +++ b/include/linux/percpu-refcount.h @@ -71,6 +71,7 @@ void percpu_ref_reinit(struct percpu_ref *ref); void percpu_ref_exit(struct percpu_ref *ref); void percpu_ref_kill_and_confirm(struct percpu_ref *ref, percpu_ref_func_t *confirm_kill); +void __percpu_ref_kill_expedited(struct percpu_ref *ref); /** * percpu_ref_kill - drop the initial ref |