Author: kib
Date: Wed Mar 28 13:56:18 2012
New Revision: 233608
URL: http://svn.freebsd.org/changeset/base/233608
Log:
Microoptimize: in qsync loop over mount vnodes, only unlock mount
interlock after we committed to try to vget() the vnode.
Submitted by: bde
Reviewed by: mckusick
Tested by: pho
MFC after: 1 week
Modified:
head/sys/ufs/ufs/ufs_quota.c
Modified: head/sys/ufs/ufs/ufs_quota.c
==============================================================================
--- head/sys/ufs/ufs/ufs_quota.c Wed Mar 28 13:47:07 2012
(r233607)
+++ head/sys/ufs/ufs/ufs_quota.c Wed Mar 28 13:56:18 2012
(r233608)
@@ -1061,12 +1061,11 @@ qsync(struct mount *mp)
again:
MNT_VNODE_FOREACH(vp, mp, mvp) {
VI_LOCK(vp);
- MNT_IUNLOCK(mp);
if (vp->v_type == VNON) {
VI_UNLOCK(vp);
- MNT_ILOCK(mp);
continue;
}
+ MNT_IUNLOCK(mp);
error = vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td);
if (error) {
MNT_ILOCK(mp);
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