Author: mjg
Date: Thu Oct 23 15:35:47 2014
New Revision: 273549
URL: https://svnweb.freebsd.org/changeset/base/273549
Log:
Avoid taking the lock in selfdfree when not needed.
Modified:
head/sys/kern/sys_generic.c
Modified: head/sys/kern/sys_generic.c
==============================================================================
--- head/sys/kern/sys_generic.c Thu Oct 23 15:16:40 2014 (r273548)
+++ head/sys/kern/sys_generic.c Thu Oct 23 15:35:47 2014 (r273549)
@@ -1600,10 +1600,11 @@ static void
selfdfree(struct seltd *stp, struct selfd *sfp)
{
STAILQ_REMOVE(&stp->st_selq, sfp, selfd, sf_link);
- mtx_lock(sfp->sf_mtx);
- if (sfp->sf_si)
+ if (sfp->sf_si != NULL) {
+ mtx_lock(sfp->sf_mtx);
TAILQ_REMOVE(&sfp->sf_si->si_tdlist, sfp, sf_threads);
- mtx_unlock(sfp->sf_mtx);
+ mtx_unlock(sfp->sf_mtx);
+ }
uma_zfree(selfd_zone, sfp);
}
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