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>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d73c133fdbe138845faa01c8967e6b014eac1d34..37576b822f06c98c2d3342af1cdecbe0e5a8f25b 100644 (file)
--- 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();
 }