path: root/include
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authorLinus Torvalds <torvalds@linux-foundation.org>2014-09-24 09:51:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-09-24 09:51:50 -0700
commit02f130a7872d26bd6ceb4e86b531761d79ac76b7 (patch)
tree735bb50640f87d95fd67cd869bc6c46d46201244 /include
parent2d7ed01e5bda639bdbca5507e06c34f46348b681 (diff)
parent0a30288da1aec914e158c2d7a3482a85f632750f (diff)
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')
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