Author: mjg
Date: Mon Sep 23 08:53:14 2019
New Revision: 352617
URL: https://svnweb.freebsd.org/changeset/base/352617
Log:
cache: count evictions of negatve entries
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/kern/vfs_cache.c
Modified: head/sys/kern/vfs_cache.c
==============================================================================
--- head/sys/kern/vfs_cache.c Mon Sep 23 07:23:29 2019 (r352616)
+++ head/sys/kern/vfs_cache.c Mon Sep 23 08:53:14 2019 (r352617)
@@ -378,6 +378,8 @@ STATNODE_COUNTER(numfullpathfail2,
"Number of fullpath search errors (VOP_VPTOCNP failures)");
STATNODE_COUNTER(numfullpathfail4, "Number of fullpath search errors
(ENOMEM)");
STATNODE_COUNTER(numfullpathfound, "Number of successful fullpath calls");
+static long numneg_evicted; STATNODE_ULONG(numneg_evicted,
+ "Number of negative entries evicted when adding a new entry");
STATNODE_COUNTER(zap_and_exit_bucket_relock_success,
"Number of successful removals after relocking");
static long zap_and_exit_bucket_fail; STATNODE_ULONG(zap_and_exit_bucket_fail,
@@ -844,6 +846,7 @@ cache_negative_zap_one(void)
ncp->nc_name, ncp->nc_neghits);
cache_zap_locked(ncp, true);
+ numneg_evicted++;
out_unlock_all:
mtx_unlock(&neglist->nl_lock);
rw_wunlock(blp);
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