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NFSD: Record number of flush calls

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[ Upstream commit df2aff524faceaf743b7c5ab0f4fb86cb511f782 ]

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chuck Lever
2022-07-08 14:24:45 -04:00
committed by Greg Kroah-Hartman
parent 2cba48b3d0
commit 04b9376a10
1 changed files with 11 additions and 2 deletions
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13
fs/nfsd/filecache.c
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@@ -45,6 +45,7 @@ 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_acquisitions);
static DEFINE_PER_CPU(unsigned long, nfsd_file_releases); 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_total_age);
static DEFINE_PER_CPU(unsigned long, nfsd_file_pages_flushed);
static DEFINE_PER_CPU(unsigned long, nfsd_file_evictions); static DEFINE_PER_CPU(unsigned long, nfsd_file_evictions);
struct nfsd_fcache_disposal { struct nfsd_fcache_disposal {
@@ -242,7 +243,12 @@ nfsd_file_check_write_error(struct nfsd_file *nf)
static void static void
nfsd_file_flush(struct nfsd_file *nf) nfsd_file_flush(struct nfsd_file *nf)
{ {
if (nf->nf_file && vfs_fsync(nf->nf_file, 1) != 0) struct file *file = nf->nf_file;
if (!file || !(file->f_mode & FMODE_WRITE))
return;
this_cpu_add(nfsd_file_pages_flushed, file->f_mapping->nrpages);
if (vfs_fsync(file, 1) != 0)
nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id)); nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id));
} }
@@ -1069,7 +1075,8 @@ nfsd_file_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
*/ */
static int nfsd_file_cache_stats_show(struct seq_file *m, void *v) static int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
{ {
unsigned long hits = 0, acquisitions = 0, releases = 0, evictions = 0; unsigned long releases = 0, pages_flushed = 0, evictions = 0;
unsigned long hits = 0, acquisitions = 0;
unsigned int i, count = 0, longest = 0; unsigned int i, count = 0, longest = 0;
unsigned long lru = 0, total_age = 0; unsigned long lru = 0, total_age = 0;
@@ -1094,6 +1101,7 @@ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
releases += per_cpu(nfsd_file_releases, i); releases += per_cpu(nfsd_file_releases, i);
total_age += per_cpu(nfsd_file_total_age, i); total_age += per_cpu(nfsd_file_total_age, i);
evictions += per_cpu(nfsd_file_evictions, i); evictions += per_cpu(nfsd_file_evictions, i);
pages_flushed += per_cpu(nfsd_file_pages_flushed, i);
} }
seq_printf(m, "total entries: %u\n", count); seq_printf(m, "total entries: %u\n", count);
@@ -1107,6 +1115,7 @@ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
seq_printf(m, "mean age (ms): %ld\n", total_age / releases); seq_printf(m, "mean age (ms): %ld\n", total_age / releases);
else else
seq_printf(m, "mean age (ms): -\n"); seq_printf(m, "mean age (ms): -\n");
seq_printf(m, "pages flushed: %lu\n", pages_flushed);
return 0; return 0;
} }