mm: account reaped page cache on inode cache pruning

Inode cache pruning indirectly reclaims page-cache by invalidating mapping
pages.  Let's account them into reclaim-state to notice this progress in
memory reclaimer.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/inode.c b/fs/inode.c
index 87535753ab04..4fa4f0916af9 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -776,6 +776,8 @@ void prune_icache_sb(struct super_block *sb, int nr_to_scan)
         else
                 __count_vm_events(PGINODESTEAL, reap);
         spin_unlock(&sb->s_inode_lru_lock);
+        if (current->reclaim_state)
+                current->reclaim_state->reclaimed_slab += reap;
 
         dispose_list(&freeable);
 }