Include count of pagecache pages in show_mem() output

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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d73c133fdbe1..37576b822f06 100644
--- a/mm/page_alloc.c
+++ b/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();
 }