FS-Cache: Add a retirement stat counter

Add a stat counter to count retirement events rather than ordinary release
events (the retire argument to fscache_relinquish_cookie()).

Signed-off-by: David Howells <dhowells@redhat.com>

3 files changed, 7 insertions, 2 deletions

diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
index f979659c1b3f..990535071a8a 100644
--- a/fs/fscache/cookie.c
+++ b/fs/fscache/cookie.c
@@ -415,6 +415,8 @@ void __fscache_relinquish_cookie(struct fscache_cookie *cookie, int retire)
         unsigned long event;
 
         fscache_stat(&fscache_n_relinquishes);
+        if (retire)
+                fscache_stat(&fscache_n_relinquishes_retire);
 
         if (!cookie) {
                 fscache_stat(&fscache_n_relinquishes_null);
diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
index e5046519b153..2bf463d26080 100644
--- a/fs/fscache/internal.h
+++ b/fs/fscache/internal.h
@@ -202,6 +202,7 @@ extern atomic_t fscache_n_updates_run;
 extern atomic_t fscache_n_relinquishes;
 extern atomic_t fscache_n_relinquishes_null;
 extern atomic_t fscache_n_relinquishes_waitcrt;
+extern atomic_t fscache_n_relinquishes_retire;
 
 extern atomic_t fscache_n_cookie_index;
 extern atomic_t fscache_n_cookie_data;
diff --git a/fs/fscache/stats.c b/fs/fscache/stats.c
index cda69994e06d..9e15289eb5c1 100644
--- a/fs/fscache/stats.c
+++ b/fs/fscache/stats.c
@@ -85,6 +85,7 @@ atomic_t fscache_n_updates_run;
 atomic_t fscache_n_relinquishes;
 atomic_t fscache_n_relinquishes_null;
 atomic_t fscache_n_relinquishes_waitcrt;
+atomic_t fscache_n_relinquishes_retire;
 
 atomic_t fscache_n_cookie_index;
 atomic_t fscache_n_cookie_data;
@@ -168,10 +169,11 @@ static int fscache_stats_show(struct seq_file *m, void *v)
                    atomic_read(&fscache_n_updates_null),
                    atomic_read(&fscache_n_updates_run));
 
-        seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u\n",
+        seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u rtr=%u\n",
                    atomic_read(&fscache_n_relinquishes),
                    atomic_read(&fscache_n_relinquishes_null),
-                   atomic_read(&fscache_n_relinquishes_waitcrt));
+                   atomic_read(&fscache_n_relinquishes_waitcrt),
+                   atomic_read(&fscache_n_relinquishes_retire));
 
         seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n",
                    atomic_read(&fscache_n_attr_changed),