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Message-Id: <20240710-nfsd-next-v1-3-21fca616ac53@kernel.org>
Date: Wed, 10 Jul 2024 09:05:33 -0400
From: Jeff Layton <jlayton@...nel.org>
To: Chuck Lever <chuck.lever@...cle.com>, Neil Brown <neilb@...e.de>,
Olga Kornievskaia <kolga@...app.com>, Dai Ngo <Dai.Ngo@...cle.com>,
Tom Talpey <tom@...pey.com>
Cc: Youzhong Yang <youzhong@...il.com>, linux-nfs@...r.kernel.org,
linux-kernel@...r.kernel.org, Jeff Layton <jlayton@...nel.org>
Subject: [PATCH 3/3] nfsd: count nfsd_file allocations
We already count the frees (via nfsd_file_releases). Count the
allocations as well. Also switch the direct call to nfsd_file_slab_free
in nfsd_file_do_acquire to nfsd_file_free, so that the allocs and
releases match up.
Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
fs/nfsd/filecache.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 52063f2cf0df..8997058ddbcb 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -56,6 +56,7 @@
static DEFINE_PER_CPU(unsigned long, nfsd_file_cache_hits);
static DEFINE_PER_CPU(unsigned long, nfsd_file_acquisitions);
+static DEFINE_PER_CPU(unsigned long, nfsd_file_allocations);
static DEFINE_PER_CPU(unsigned long, nfsd_file_releases);
static DEFINE_PER_CPU(unsigned long, nfsd_file_total_age);
static DEFINE_PER_CPU(unsigned long, nfsd_file_evictions);
@@ -215,6 +216,7 @@ nfsd_file_alloc(struct net *net, struct inode *inode, unsigned char need,
if (unlikely(!nf))
return NULL;
+ this_cpu_inc(nfsd_file_allocations);
INIT_LIST_HEAD(&nf->nf_lru);
INIT_LIST_HEAD(&nf->nf_gc);
nf->nf_birthtime = ktime_get();
@@ -912,6 +914,7 @@ nfsd_file_cache_shutdown(void)
for_each_possible_cpu(i) {
per_cpu(nfsd_file_cache_hits, i) = 0;
per_cpu(nfsd_file_acquisitions, i) = 0;
+ per_cpu(nfsd_file_allocations, i) = 0;
per_cpu(nfsd_file_releases, i) = 0;
per_cpu(nfsd_file_total_age, i) = 0;
per_cpu(nfsd_file_evictions, i) = 0;
@@ -1027,7 +1030,7 @@ nfsd_file_do_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
if (unlikely(nf)) {
spin_unlock(&inode->i_lock);
rcu_read_unlock();
- nfsd_file_slab_free(&new->nf_rcu);
+ nfsd_file_free(new);
goto wait_for_construction;
}
nf = new;
@@ -1205,7 +1208,7 @@ nfsd_file_acquire_opened(struct svc_rqst *rqstp, struct svc_fh *fhp,
*/
int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
{
- unsigned long releases = 0, evictions = 0;
+ unsigned long allocations = 0, releases = 0, evictions = 0;
unsigned long hits = 0, acquisitions = 0;
unsigned int i, count = 0, buckets = 0;
unsigned long lru = 0, total_age = 0;
@@ -1230,6 +1233,7 @@ int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
for_each_possible_cpu(i) {
hits += per_cpu(nfsd_file_cache_hits, i);
acquisitions += per_cpu(nfsd_file_acquisitions, i);
+ allocations += per_cpu(nfsd_file_allocations, i);
releases += per_cpu(nfsd_file_releases, i);
total_age += per_cpu(nfsd_file_total_age, i);
evictions += per_cpu(nfsd_file_evictions, i);
@@ -1240,6 +1244,7 @@ int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
seq_printf(m, "lru entries: %lu\n", lru);
seq_printf(m, "cache hits: %lu\n", hits);
seq_printf(m, "acquisitions: %lu\n", acquisitions);
+ seq_printf(m, "allocations: %lu\n", allocations);
seq_printf(m, "releases: %lu\n", releases);
seq_printf(m, "evictions: %lu\n", evictions);
if (releases)
--
2.45.2
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