Commit 0fd244c1 authored by Chuck Lever's avatar Chuck Lever
Browse files

NFSD: Report filecache LRU size 



Surface the NFSD filecache's LRU list length to help field
troubleshooters monitor filecache issues.

Reviewed-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent ca3f9acb

fs/nfsd/filecache.c

+3 −1
Original line number Diff line number Diff line
@@ -1048,7 +1048,7 @@ 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 int i, count = 0, longest = 0;

	unsigned long hits = 0;

	unsigned long lru = 0, hits = 0;



	/*

	 * No need for spinlocks here since we're not terribly interested in
@@ -1061,6 +1061,7 @@ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v) 
			count += nfsd_file_hashtbl[i].nfb_count;

			longest = max(longest, nfsd_file_hashtbl[i].nfb_count);

		}

		lru = list_lru_count(&nfsd_file_lru);

	}

	mutex_unlock(&nfsd_mutex);
@@ -1069,6 +1070,7 @@ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v) 


	seq_printf(m, "total entries: %u\n", count);

	seq_printf(m, "longest chain: %u\n", longest);

	seq_printf(m, "lru entries:   %lu\n", lru);

	seq_printf(m, "cache hits:    %lu\n", hits);

	return 0;

}