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NFSD: Record number of flush calls

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Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2022-07-08 14:24:45 -04:00
parent 94660cc19c
commit df2aff524f
1 changed files with 11 additions and 2 deletions
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13
fs/nfsd/filecache.c
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@ -46,6 +46,7 @@ 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_releases);
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);
struct nfsd_fcache_disposal {
@ -243,7 +244,12 @@ nfsd_file_check_write_error(struct nfsd_file *nf)
static void
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));
}
@ -1070,7 +1076,8 @@ nfsd_file_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
*/
static int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
{
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 long lru = 0, total_age = 0;
@ -1095,6 +1102,7 @@ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
releases += per_cpu(nfsd_file_releases, i);
total_age += per_cpu(nfsd_file_total_age, 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);
@ -1108,6 +1116,7 @@ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
seq_printf(m, "mean age (ms): %ld\n", total_age / releases);
else
seq_printf(m, "mean age (ms): -\n");
seq_printf(m, "pages flushed: %lu\n", pages_flushed);
return 0;
}