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cache: hide "doingcache" behind DEBUG_CACHE

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This commit is contained in:
Mateusz Guzik 2019-11-27 01:20:21 +00:00
parent a67d540832
commit 36afce39ae
1 changed files with 6 additions and 0 deletions
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6
sys/kern/vfs_cache.c
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@ -330,9 +330,11 @@ cache_out_ts(struct namecache *ncp, struct timespec *tsp, int *ticksp)
*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, struct componentname *cnp,
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, struct componentname *cnp,
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.