[PATCH] zoned vm counters: conversion of nr_slab to per zone counter

- Allows reclaim to access counter without looping over processor counts.

- Allows accurate statistics on how many pages are used in a zone by
  the slab. This may become useful to balance slab allocations over
  various zones.

[akpm@osdl.org: bugfix]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 839e9a04fd49..67e03fc8533e 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -51,6 +51,7 @@ enum zone_stat_item {
         NR_FILE_MAPPED, /* pagecache pages mapped into pagetables.
                            only modified from process context */
         NR_FILE_PAGES,
+        NR_SLAB,        /* Pages used by slab allocator */
         NR_VM_ZONE_STAT_ITEMS };
 
 struct per_cpu_pages {
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 8ab8229523e6..4b97381a2937 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -26,8 +26,7 @@ struct page_state {
         unsigned long nr_writeback;     /* Pages under writeback */
         unsigned long nr_unstable;      /* NFS unstable pages */
         unsigned long nr_page_table_pages;/* Pages used for pagetables */
-        unsigned long nr_slab;          /* In slab */
-#define GET_PAGE_STATE_LAST nr_slab
+#define GET_PAGE_STATE_LAST nr_page_table_pages
 
         /*
          * The below are zeroed by get_page_state().  Use get_full_page_state()