From 578c2fd6a7f378434655e5c480e23152a3994404 Mon Sep 17 00:00:00 2001 From: Janet Morgan Date: Tue, 21 Jun 2005 17:14:56 -0700 Subject: [PATCH] [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/oom_kill.c | 7 ++++--- mm/page_alloc.c | 1 + 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 4bbb1cb10495..59666d905f19 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -258,6 +258,10 @@ void out_of_memory(unsigned int __nocast gfp_mask) struct mm_struct *mm = NULL; task_t * p; + printk("oom-killer: gfp_mask=0x%x\n", gfp_mask); + /* print memory stats */ + show_mem(); + read_lock(&tasklist_lock); retry: p = select_bad_process(); @@ -268,12 +272,9 @@ retry: /* Found nothing?!?! Either we hang forever, or we panic. */ if (!p) { read_unlock(&tasklist_lock); - show_free_areas(); panic("Out of memory and no killable processes...\n"); } - printk("oom-killer: gfp_mask=0x%x\n", gfp_mask); - show_free_areas(); mm = oom_kill_process(p); if (!mm) goto retry; 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: