unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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nfsd: count nfsd_file allocations

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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@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Jeff Layton 2024-07-10 09:05:33 -04:00 committed by Chuck Lever
parent 8a79261763
commit 700bb4ff91
1 changed files with 7 additions and 2 deletions
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9
fs/nfsd/filecache.c
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@ -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();
@ -911,6 +913,7 @@ 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;
@ -1026,7 +1029,7 @@ 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;
@ -1200,7 +1203,7 @@ 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;
@ -1225,6 +1228,7 @@ 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);
@ -1235,6 +1239,7 @@ 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)