Author: mav
Date: Sat Nov 16 15:41:54 2013
New Revision: 258225
URL: http://svnweb.freebsd.org/changeset/base/258225
Log:
MFC r254787:
Remove locking from taskqueue_member(). The list of threads is static
during the taskqueue life cycle, so there is no need to protect it,
taking quite congested lock several more times for each ZFS I/O.
Modified:
stable/9/sys/kern/subr_taskqueue.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/kern/subr_taskqueue.c
==============================================================================
--- stable/9/sys/kern/subr_taskqueue.c Sat Nov 16 15:34:14 2013
(r258224)
+++ stable/9/sys/kern/subr_taskqueue.c Sat Nov 16 15:41:54 2013
(r258225)
@@ -577,7 +577,6 @@ taskqueue_member(struct taskqueue *queue
{
int i, j, ret = 0;
- TQ_LOCK(queue);
for (i = 0, j = 0; ; i++) {
if (queue->tq_threads[i] == NULL)
continue;
@@ -588,6 +587,5 @@ taskqueue_member(struct taskqueue *queue
if (++j >= queue->tq_tcount)
break;
}
- TQ_UNLOCK(queue);
return (ret);
}
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