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| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2009-12-16 01:45:32 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-16 16:19:57 +0100 |
| commit | 3b4798cbc13dd8d1150aa6377f97f0e11450a67d (patch) | |
| tree | 3a805cae1557098ddd4386fd6117f4f0fde5123f | |
| parent | mfd: compile fix for twl4030 renaming (diff) | |
| download | linux-3b4798cbc13dd8d1150aa6377f97f0e11450a67d.tar.xz linux-3b4798cbc13dd8d1150aa6377f97f0e11450a67d.zip | |
oom-kill: show virtual size and rss information of the killed process
In a typical oom analysis scenario, we frequently want to know whether the
killed process has a memory leak or not at the first step. This patch
adds vsz and rss information to the oom log to help this analysis. To
save time for the debugging.
example:
===================================================================
rsyslogd invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0
Pid: 1308, comm: rsyslogd Not tainted 2.6.32-rc6 #24
Call Trace:
[<ffffffff8132e35b>] ?_spin_unlock+0x2b/0x40
[<ffffffff810f186e>] oom_kill_process+0xbe/0x2b0
(snip)
492283 pages non-shared
Out of memory: kill process 2341 (memhog) score 527276 or a child
Killed process 2341 (memhog) vsz:1054552kB, anon-rss:970588kB, file-rss:4kB
===========================================================================
^
|
here
[rientjes@google.com: fix race, add pid & comm to message]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/oom_kill.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 492c98624fc1..6bb8a7a7ec9a 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -352,6 +352,8 @@ static void dump_header(gfp_t gfp_mask, int order, struct mem_cgroup *mem) dump_tasks(mem); } +#define K(x) ((x) << (PAGE_SHIFT-10)) + /* * Send SIGKILL to the selected process irrespective of CAP_SYS_RAW_IO * flag though it's unlikely that we select a process with CAP_SYS_RAW_IO @@ -365,15 +367,23 @@ static void __oom_kill_task(struct task_struct *p, int verbose) return; } + task_lock(p); if (!p->mm) { WARN_ON(1); - printk(KERN_WARNING "tried to kill an mm-less task!\n"); + printk(KERN_WARNING "tried to kill an mm-less task %d (%s)!\n", + task_pid_nr(p), p->comm); + task_unlock(p); return; } if (verbose) - printk(KERN_ERR "Killed process %d (%s)\n", - task_pid_nr(p), p->comm); + printk(KERN_ERR "Killed process %d (%s) " + "vsz:%lukB, anon-rss:%lukB, file-rss:%lukB\n", + task_pid_nr(p), p->comm, + K(p->mm->total_vm), + K(get_mm_counter(p->mm, anon_rss)), + K(get_mm_counter(p->mm, file_rss))); + task_unlock(p); /* * We give our sacrificial lamb high priority and access to |