path: root/mm
diff options
authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2009-12-15 16:45:32 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 07:19:57 -0800
commit3b4798cbc13dd8d1150aa6377f97f0e11450a67d (patch)
tree3a805cae1557098ddd4386fd6117f4f0fde5123f /mm
parent8bea8672edfca7ec5f661cafb218f1205863b343 (diff)
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>
Diffstat (limited to 'mm')
1 files changed, 13 insertions, 3 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 492c98624fc..6bb8a7a7ec9 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)
+#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)
+ task_lock(p);
if (!p->mm) {
- 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);
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