Author: mjg
Date: Sun Nov 5 08:31:25 2017
New Revision: 325433
URL: https://svnweb.freebsd.org/changeset/base/325433
Log:
namecache: skip locking in cache_purge_negative if there are no entries
Modified:
head/sys/kern/vfs_cache.c
Modified: head/sys/kern/vfs_cache.c
==============================================================================
--- head/sys/kern/vfs_cache.c Sun Nov 5 08:20:27 2017 (r325432)
+++ head/sys/kern/vfs_cache.c Sun Nov 5 08:31:25 2017 (r325433)
@@ -1967,6 +1967,8 @@ cache_purge_negative(struct vnode *vp)
CTR1(KTR_VFS, "cache_purge_negative(%p)", vp);
SDT_PROBE1(vfs, namecache, purge_negative, done, vp);
+ if (LIST_EMPTY(&vp->v_cache_src))
+ return;
TAILQ_INIT(&ncps);
vlp = VP2VNODELOCK(vp);
mtx_lock(vlp);
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