From: Larry Woodman <lwoodman@redhat.com>

The show_mem() output does not include the total number of pagecache pages.
 This would be helpful when analyzing the debug information in the
/var/log/messages file after OOM kills occur.

This patch includes the total pagecache pages in that output.

Signed-off-by: Larry Woodman <lwoodman@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_alloc.c |    2 ++
 1 file changed, 2 insertions(+)

diff -puN mm/page_alloc.c~include-count-of-pagecache-pages-in-show_mem-output mm/page_alloc.c
--- a/mm/page_alloc.c~include-count-of-pagecache-pages-in-show_mem-output
+++ a/mm/page_alloc.c
@@ -1874,6 +1874,8 @@ void show_free_areas(void)
 		printk("= %lukB\n", K(total));
 	}
 
+	printk("%ld total pagecache pages\n", global_page_state(NR_FILE_PAGES));
+
 	show_swap_cache_info();
 }
 
_