mm: account reaped page cache on inode cache pruning
Konstantin Khlebnikov [Tue, 10 Jan 2012 23:07:18 +0000 (15:07 -0800)]
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>

fs/inode.c

index 8753575..4fa4f09 100644 (file)
@@ -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);
 }