diff mbox series

[v2,10/31] NFSD: Record number of flush calls

Message ID 165643961121.84360.9957961541694850621.stgit@manet.1015granger.net (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series Overhaul NFSD filecache | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Chuck Lever June 28, 2022, 6:06 p.m. UTC 
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/filecache.c |   13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 12f587473913..7b532449b93f 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -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 {
@@ -249,7 +250,12 @@  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));
 }
 
@@ -1090,7 +1096,8 @@  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;
 
@@ -1115,6 +1122,7 @@  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);
@@ -1128,6 +1136,7 @@  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;
 }