Author: mjg
Date: Wed Nov 27 01:20:21 2019
New Revision: 355123
URL: https://svnweb.freebsd.org/changeset/base/355123
Log:
cache: hide "doingcache" behind DEBUG_CACHE
Modified:
head/sys/kern/vfs_cache.c
Modified: head/sys/kern/vfs_cache.c
==============================================================================
--- head/sys/kern/vfs_cache.c Wed Nov 27 00:39:23 2019 (r355122)
+++ head/sys/kern/vfs_cache.c Wed Nov 27 01:20:21 2019 (r355123)
@@ -330,9 +330,11 @@ cache_out_ts(struct namecache *ncp, struct timespec *t
*ticksp = ncp_ts->nc_ticks;
}
+#ifdef DEBUG_CACHE
static int __read_mostly doingcache = 1; /* 1 => enable the cache */
SYSCTL_INT(_debug, OID_AUTO, vfscache, CTLFLAG_RW, &doingcache, 0,
"VFS namecache enabled");
+#endif
/* Export size information to userland */
SYSCTL_INT(_debug_sizeof, OID_AUTO, namecache, CTLFLAG_RD, SYSCTL_NULL_INT_PTR,
@@ -1298,10 +1300,12 @@ cache_lookup(struct vnode *dvp, struct vnode **vpp, st
enum vgetstate vs;
int error, ltype;
+#ifdef DEBUG_CACHE
if (__predict_false(!doingcache)) {
cnp->cn_flags &= ~MAKEENTRY;
return (0);
}
+#endif
counter_u64_add(numcalls, 1);
@@ -1681,8 +1685,10 @@ cache_enter_time(struct vnode *dvp, struct vnode *vp,
VNASSERT(dvp == NULL || (dvp->v_iflag & VI_DOOMED) == 0, dvp,
("cache_enter: Doomed vnode used as src"));
+#ifdef DEBUG_CACHE
if (__predict_false(!doingcache))
return;
+#endif
/*
* Avoid blowout in namecache entries.
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