Author: mckay
Date: Wed Apr 8 04:30:16 2009
New Revision: 190837
URL: http://svn.freebsd.org/changeset/base/190837
Log:
MFC r187460: Add a limit on namecache entries.
Approved by: re (kib)
Modified:
stable/7/sys/ (props changed)
stable/7/sys/contrib/pf/ (props changed)
stable/7/sys/dev/ath/ath_hal/ (props changed)
stable/7/sys/dev/cxgb/ (props changed)
stable/7/sys/kern/vfs_cache.c
Modified: stable/7/sys/kern/vfs_cache.c
==============================================================================
--- stable/7/sys/kern/vfs_cache.c Wed Apr 8 03:53:20 2009
(r190836)
+++ stable/7/sys/kern/vfs_cache.c Wed Apr 8 04:30:16 2009
(r190837)
@@ -495,6 +495,12 @@ cache_enter(dvp, vp, cnp)
if (!doingcache)
return;
+ /*
+ * Avoid blowout in namecache entries.
+ */
+ if (numcache >= desiredvnodes * 2)
+ return;
+
if (cnp->cn_nameptr[0] == '.') {
if (cnp->cn_namelen == 1) {
return;
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