[PATCH] add OOM debug

This patch provides more debug info when the system is OOM.  It displays
memory stats (basically sysrq-m info) from __alloc_pages() when page
allocation fails and during OOM kill.

Thanks to Dave Jones for coming up with the idea.

Signed-off-by: Janet Morgan <janetmor@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 10446a646374..be05d17bd7df 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -935,6 +935,7 @@ nopage:
                         " order:%d, mode:0x%x\n",
                         p->comm, order, gfp_mask);
                 dump_stack();
+                show_mem();
         }
         return NULL;
 got_pg: