From: "Xin Zhou" <xin.zhou@gmx.com>
To: "Tetsuo Handa" <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org
Subject: Re: OOM: Better, but still there on
Date: Sun, 18 Dec 2016 01:28:15 +0100 [thread overview]
Message-ID: <trinity-d2929a62-d9ee-4778-aad2-cf8a2ae0494f-1482020895677@3capp-mailcom-bs06> (raw)
In-Reply-To: <862a1ada-17f1-9cff-c89b-46c47432e89f@I-love.SAKURA.ne.jp>
Hi,
The system supposes to have special memory reservation for coredump and other debug info when encountering panic,
the size seems configurable.
Thanks,
Xin
Sent: Saturday, December 17, 2016 at 6:44 AM
From: "Tetsuo Handa" <penguin-kernel@I-love.SAKURA.ne.jp>
To: "Nils Holland" <nholland@tisys.org>, "Michal Hocko" <mhocko@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Chris Mason" <clm@fb.com>, "David Sterba" <dsterba@suse.cz>, linux-btrfs@vger.kernel.org
Subject: Re: OOM: Better, but still there on
On 2016/12/17 21:59, Nils Holland wrote:
> On Sat, Dec 17, 2016 at 01:02:03AM +0100, Michal Hocko wrote:
>> mount -t tracefs none /debug/trace
>> echo 1 > /debug/trace/events/vmscan/enable
>> cat /debug/trace/trace_pipe > trace.log
>>
>> should help
>> [...]
>
> No problem! I enabled writing the trace data to a file and then tried
> to trigger another OOM situation. That worked, this time without a
> complete kernel panic, but with only my processes being killed and the
> system becoming unresponsive. When that happened, I let it run for
> another minute or two so that in case it was still logging something
> to the trace file, it could continue to do so some time longer. Then I
> rebooted with the only thing that still worked, i.e. by means of magic
> SysRequest.
Under OOM situation, writing to a file on disk unlikely works. Maybe
logging via network ( "cat /debug/trace/trace_pipe > /dev/udp/$ip/$port"
if your are using bash) works better. (I wish we can do it from kernel
so that /bin/cat is not disturbed by delays due to page fault.)
If you can configure netconsole for logging OOM killer messages and
UDP socket for logging trace_pipe messages, udplogger at
https://osdn.net/projects/akari/scm/svn/tree/head/branches/udplogger/
might fit for logging both output with timestamp into a single file.
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html[http://vger.kernel.org/majordomo-info.html]
next prev parent reply other threads:[~2016-12-18 0:35 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-15 22:57 OOM: Better, but still there on 4.9 Nils Holland
2016-12-16 7:39 ` Michal Hocko
2016-12-16 15:58 ` OOM: Better, but still there on Michal Hocko
2016-12-16 15:58 ` [PATCH 1/2] mm: consolidate GFP_NOFAIL checks in the allocator slowpath Michal Hocko
2016-12-16 15:58 ` [PATCH 2/2] mm, oom: do not enfore OOM killer for __GFP_NOFAIL automatically Michal Hocko
2016-12-16 17:31 ` Johannes Weiner
2016-12-16 22:12 ` Michal Hocko
2016-12-17 11:17 ` Tetsuo Handa
2016-12-18 16:37 ` Michal Hocko
2016-12-16 18:47 ` OOM: Better, but still there on Nils Holland
2016-12-17 0:02 ` Michal Hocko
2016-12-17 12:59 ` Nils Holland
2016-12-17 14:44 ` Tetsuo Handa
2016-12-17 17:11 ` Nils Holland
2016-12-17 21:06 ` Nils Holland
2016-12-18 5:14 ` Tetsuo Handa
2016-12-19 13:45 ` Michal Hocko
2016-12-20 2:08 ` Nils Holland
2016-12-21 7:36 ` Michal Hocko
2016-12-21 11:00 ` Tetsuo Handa
2016-12-21 11:16 ` Michal Hocko
2016-12-21 14:04 ` Chris Mason
2016-12-22 10:10 ` Nils Holland
2016-12-22 10:27 ` Michal Hocko
2016-12-22 10:35 ` Nils Holland
2016-12-22 10:46 ` Tetsuo Handa
2016-12-22 19:17 ` Michal Hocko
2016-12-22 21:46 ` Nils Holland
2016-12-23 10:51 ` Michal Hocko
2016-12-23 12:18 ` Nils Holland
2016-12-23 12:57 ` Michal Hocko
2016-12-23 14:47 ` [RFC PATCH] mm, memcg: fix (Re: OOM: Better, but still there on) Michal Hocko
2016-12-23 22:26 ` Nils Holland
2016-12-26 12:48 ` Michal Hocko
2016-12-26 18:57 ` Nils Holland
2016-12-27 8:08 ` Michal Hocko
2016-12-27 11:23 ` Nils Holland
2016-12-27 11:27 ` Michal Hocko
2016-12-27 15:55 ` Michal Hocko
2016-12-27 16:28 ` [PATCH] mm, vmscan: consider eligible zones in get_scan_count kbuild test robot
2016-12-28 8:51 ` Michal Hocko
2016-12-27 19:33 ` [RFC PATCH] mm, memcg: fix (Re: OOM: Better, but still there on) Nils Holland
2016-12-28 8:57 ` Michal Hocko
2016-12-29 1:20 ` Minchan Kim
2016-12-29 9:04 ` Michal Hocko
2016-12-30 2:05 ` Minchan Kim
2016-12-30 10:40 ` Michal Hocko
2016-12-29 0:31 ` Minchan Kim
2016-12-29 0:48 ` Minchan Kim
2016-12-29 8:52 ` Michal Hocko
2016-12-30 10:19 ` Mel Gorman
2016-12-30 11:05 ` Michal Hocko
2016-12-30 12:43 ` Mel Gorman
2016-12-25 22:25 ` [lkp-developer] [mm, memcg] d18e2b2aca: WARNING:at_mm/memcontrol.c:#mem_cgroup_update_lru_size kernel test robot
2016-12-26 12:26 ` Michal Hocko
2016-12-26 12:50 ` Michal Hocko
2016-12-18 0:28 ` Xin Zhou [this message]
2016-12-16 18:15 ` OOM: Better, but still there on 4.9 Chris Mason
2016-12-16 22:14 ` Michal Hocko
2016-12-16 22:47 ` Chris Mason
2016-12-16 23:31 ` Michal Hocko
2016-12-16 19:50 ` Chris Mason
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=trinity-d2929a62-d9ee-4778-aad2-cf8a2ae0494f-1482020895677@3capp-mailcom-bs06 \
--to=xin.zhou@gmx.com \
--cc=linux-btrfs@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=penguin-kernel@I-love.SAKURA.ne.jp \
/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;
as well as URLs for NNTP newsgroup(s).