Author: mjg
Date: Sat Oct 8 13:36:59 2016
New Revision: 306841
URL: https://svnweb.freebsd.org/changeset/base/306841
Log:
vfs: clear the tmp free list flag before taking the free vnode list lock
Safe access is already guaranteed because of the mnt_listmx lock.
Modified:
head/sys/kern/vfs_subr.c
Modified: head/sys/kern/vfs_subr.c
==============================================================================
--- head/sys/kern/vfs_subr.c Sat Oct 8 12:53:23 2016 (r306840)
+++ head/sys/kern/vfs_subr.c Sat Oct 8 13:36:59 2016 (r306841)
@@ -1066,16 +1066,16 @@ vnlru_return_batch_locked(struct mount *
if (mp->mnt_tmpfreevnodelistsize == 0)
return;
- mtx_lock(&vnode_free_list_mtx);
TAILQ_FOREACH(vp, &mp->mnt_tmpfreevnodelist, v_actfreelist) {
VNASSERT((vp->v_mflag & VMP_TMPMNTFREELIST) != 0, vp,
("vnode without VMP_TMPMNTFREELIST on
mnt_tmpfreevnodelist"));
vp->v_mflag &= ~VMP_TMPMNTFREELIST;
}
+ mtx_lock(&vnode_free_list_mtx);
TAILQ_CONCAT(&vnode_free_list, &mp->mnt_tmpfreevnodelist,
v_actfreelist);
freevnodes += mp->mnt_tmpfreevnodelistsize;
- mp->mnt_tmpfreevnodelistsize = 0;
mtx_unlock(&vnode_free_list_mtx);
+ mp->mnt_tmpfreevnodelistsize = 0;
}
static void
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