Commit df2aff52 authored by Chuck Lever's avatar Chuck Lever
Browse files

NFSD: Record number of flush calls 



Reviewed-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent 94660cc1

fs/nfsd/filecache.c

+11 −2
Original line number Diff line number Diff line
@@ -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;

}