From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: caiqian@redhat.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org, rientjes@google.com, hughd@google.com,
kamezawa.hiroyu@jp.fujitsu.com, minchan.kim@gmail.com,
oleg@redhat.com
Subject: Re: [PATCH v2 0/5] Fix oom killer doesn't work at all if system have > gigabytes memory (aka CAI founded issue)
Date: Tue, 31 May 2011 16:04:52 +0900 [thread overview]
Message-ID: <4DE49314.3070105@jp.fujitsu.com> (raw)
In-Reply-To: <1973273.317151.1306817525160.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com>
>> - If you run the same program as root, non root process and privilege
>> explicit
>> dropping processes (e.g. irqbalance) will be killed at first.
> Hmm, at least there were some programs were root processes but were killed
> first.
> [ pid] ppid uid total_vm rss swap score_adj name
> [ 5720] 5353 0 24421 257 0 0 sshd
> [ 5353] 1 0 15998 189 0 0 sshd
> [ 5451] 1 0 19648 235 0 0 master
> [ 1626] 1 0 2287 129 0 0 dhclient
Hi
I can't reproduce this too. Are you sure these processes have a full root privilege?
I've made new debugging patch. After applying following patch, do these processes show
cap=1?
index f0e34d4..fe788df 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -429,7 +429,7 @@ static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *no
struct task_struct *p;
struct task_struct *task;
- pr_info("[ pid] ppid uid total_vm rss swap score_adj name\n");
+ pr_info("[ pid] ppid uid cap total_vm rss swap score_adj name\n");
for_each_process(p) {
if (oom_unkillable_task(p, mem, nodemask))
continue;
@@ -444,9 +444,9 @@ static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *no
continue;
}
- pr_info("[%6d] %6d %5d %8lu %8lu %8lu %9d %s\n",
+ pr_info("[%6d] %6d %5d %3d %8lu %8lu %8lu %9d %s\n",
task_tgid_nr(task), task_tgid_nr(task->real_parent),
- task_uid(task),
+ task_uid(task), has_capability_noaudit(task, CAP_SYS_ADMIN),
task->mm->total_vm,
get_mm_rss(task->mm) + task->mm->nr_ptes,
get_mm_counter(task->mm, MM_SWAPENTS),
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2011-05-31 7:05 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-20 8:00 KOSAKI Motohiro
2011-05-20 8:01 ` [PATCH 1/5] oom: improve dump_tasks() show items KOSAKI Motohiro
2011-05-23 22:16 ` David Rientjes
2011-05-20 8:02 ` [PATCH 2/5] oom: kill younger process first KOSAKI Motohiro
2011-05-23 2:37 ` Minchan Kim
2011-05-23 22:20 ` David Rientjes
2011-05-20 8:03 ` [PATCH 3/5] oom: oom-killer don't use proportion of system-ram internally KOSAKI Motohiro
2011-05-23 3:59 ` Minchan Kim
2011-05-24 1:14 ` KOSAKI Motohiro
2011-05-24 1:32 ` Minchan Kim
2011-05-23 4:02 ` Minchan Kim
2011-05-24 1:44 ` KOSAKI Motohiro
2011-05-24 3:11 ` KOSAKI Motohiro
2011-05-23 22:28 ` David Rientjes
2011-05-23 22:48 ` David Rientjes
2011-05-24 1:21 ` KOSAKI Motohiro
2011-05-24 8:32 ` CAI Qian
2011-05-26 7:08 ` CAI Qian
2011-05-27 19:12 ` David Rientjes
2011-05-24 2:07 ` KOSAKI Motohiro
2011-05-26 9:34 ` CAI Qian
2011-05-26 9:56 ` KOSAKI Motohiro
2011-05-20 8:04 ` [PATCH 4/5] oom: don't kill random process KOSAKI Motohiro
2011-05-23 4:31 ` Minchan Kim
2011-05-24 1:53 ` KOSAKI Motohiro
2011-05-24 8:46 ` Minchan Kim
2011-05-24 8:49 ` KOSAKI Motohiro
2011-05-24 9:04 ` Minchan Kim
2011-05-24 9:09 ` KOSAKI Motohiro
2011-05-24 9:20 ` Minchan Kim
2011-05-24 9:38 ` KOSAKI Motohiro
2011-05-23 22:32 ` David Rientjes
2011-05-24 1:35 ` KOSAKI Motohiro
2011-05-24 1:39 ` David Rientjes
2011-05-24 1:55 ` KOSAKI Motohiro
2011-05-24 1:58 ` David Rientjes
2011-05-24 2:03 ` KOSAKI Motohiro
2011-05-25 23:50 ` David Rientjes
2011-05-30 1:17 ` KOSAKI Motohiro
2011-05-31 4:48 ` David Rientjes
2011-05-31 4:54 ` KOSAKI Motohiro
2011-05-20 8:05 ` [PATCH 5/5] oom: merge oom_kill_process() with oom_kill_task() KOSAKI Motohiro
2011-05-31 1:33 ` [PATCH v2 0/5] Fix oom killer doesn't work at all if system have > gigabytes memory (aka CAI founded issue) CAI Qian
2011-05-31 4:10 ` KOSAKI Motohiro
2011-05-31 4:14 ` CAI Qian
2011-05-31 4:34 ` KOSAKI Motohiro
2011-05-31 4:49 ` KOSAKI Motohiro
2011-05-31 4:32 ` KOSAKI Motohiro
2011-05-31 4:52 ` CAI Qian
2011-05-31 7:04 ` KOSAKI Motohiro [this message]
2011-05-31 7:50 ` CAI Qian
2011-05-31 7:56 ` KOSAKI Motohiro
2011-05-31 7:59 ` CAI Qian
2011-05-31 8:11 ` KOSAKI Motohiro
2011-05-31 10:01 ` KOSAKI Motohiro
2011-06-01 1:17 ` CAI Qian
2011-06-01 3:32 ` Minchan Kim
2011-06-06 3:07 ` KOSAKI Motohiro
2011-06-06 14:44 ` Minchan Kim
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4DE49314.3070105@jp.fujitsu.com \
--to=kosaki.motohiro@jp.fujitsu.com \
--cc=akpm@linux-foundation.org \
--cc=caiqian@redhat.com \
--cc=hughd@google.com \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=minchan.kim@gmail.com \
--cc=oleg@redhat.com \
--cc=rientjes@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox