[PATCH] Reduce sched latency in shrink_dcache_sb()

This patch reduces scheduling latency in shrink_dcache_sb() noticed during
remounting of big partitions with many cached dentries.  The same latency
fix was applied to select_parent() long ago.

Signed-off-by: Denis Lunev <den@sw.ru>
Signed-off-by: Pavel Emelianov <xemul@sw.ru>
Signed-off-by: Kirill Korotaev <dev@openvz.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/dcache.c b/fs/dcache.c
index 0f7ec12d65ff..939584648504 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -489,6 +489,7 @@ repeat:
                         continue;
                 }
                 prune_one_dentry(dentry);
+                cond_resched_lock(&dcache_lock);
                 goto repeat;
         }
         spin_unlock(&dcache_lock);