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| author | Janet Morgan <janetmor@us.ibm.com> | 2005-06-21 17:14:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-21 18:46:17 -0700 |
| commit | 578c2fd6a7f378434655e5c480e23152a3994404 (patch) | |
| tree | 3a6408c416e3825cd17e33ac776425a52b743adc /mm | |
| parent | c2f29ea111e3344ed48257c2a142c3db514e1529 (diff) | |
| download | lwn-578c2fd6a7f378434655e5c480e23152a3994404.tar.gz lwn-578c2fd6a7f378434655e5c480e23152a3994404.zip | |
[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>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/oom_kill.c | 7 | ||||
| -rw-r--r-- | 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: |