mm: SLUB fix reclaim_state

SLUB does not correctly account reclaim_state.reclaimed_slab, so it will
break memory reclaim. Account it like SLAB does.

Cc: stable@kernel.org
Cc: linux-mm@kvack.org
Cc: Matt Mackall <mpm@selenic.com>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

1 files changed, 3 insertions, 0 deletions

diff --git a/mm/slub.c b/mm/slub.c
index 7ab54ecbd3f3..aa34913a41ea 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/mm.h>
+#include <linux/swap.h> /* struct reclaim_state */
 #include <linux/module.h>
 #include <linux/bit_spinlock.h>
 #include <linux/interrupt.h>
@@ -1170,6 +1171,8 @@ static void __free_slab(struct kmem_cache *s, struct page *page)
 
         __ClearPageSlab(page);
         reset_page_mapcount(page);
+        if (current->reclaim_state)
+                current->reclaim_state->reclaimed_slab += pages;
         __free_pages(page, order);
 }