From: Guenter Roeck <linux@roeck-us.net>
To: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
Cc: Wim Van Sebroeck <wim@iguana.be>,
linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: 3.8.3 and 3.9git occasional watchdog oops
Date: Thu, 4 Apr 2013 18:59:59 -0700 [thread overview]
Message-ID: <20130405015959.GA2566@roeck-us.net> (raw)
In-Reply-To: <201304050023.31143.a.miskiewicz@gmail.com>
On Fri, Apr 05, 2013 at 12:23:30AM +0200, Arkadiusz Miskiewicz wrote:
> On Thursday 14 of March 2013, Arkadiusz Miśkiewicz wrote:
> > Hi.
> >
> > Just hit watchdog related oops in 3.8.3 kernel. Unfortunately photos only.
> >
> > http://ixion.pld-linux.org/~arekm/watchdog-oops-3.8.3/IMG_8942.JPG
> > http://ixion.pld-linux.org/~arekm/watchdog-oops-3.8.3/IMG_8941.JPG
>
> 3.9git from today isn't any better unfortunately:
>
> http://ixion.pld-linux.org/~arekm/watchdog-oops-3.9git.jpg
>
> >
> > oops started after I enabled systemd watchdog functionality. Cannot
> > reproduce easily.
> >
> > watchdog here (thinkpad t400) is:
> > iTCO_wdt: Found a ICH9M-E TCO device (Version=2, TCOBASE=0x1060)
>
>
Wonder if there is a race condition in the watchdog driver: The watchdog device
is opened before watchdog_register_device returns. I suspect systemd waits for
a udev event, or by some other means detects that /dev/watchdog was created,
and opens it immediately.
I just have no idea where exactly the race condition, if there is one, is
hiding. Or maybe I am completely off track.
Guenter
next prev parent reply other threads:[~2013-04-05 2:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <201303142154.20501.arekm@maven.pl>
2013-04-04 22:23 ` Arkadiusz Miskiewicz
2013-04-05 1:59 ` Guenter Roeck [this message]
2013-04-06 3:47 ` Guenter Roeck
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=20130405015959.GA2566@roeck-us.net \
--to=linux@roeck-us.net \
--cc=a.miskiewicz@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-watchdog@vger.kernel.org \
--cc=wim@iguana.be \
/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
Powered by JetHome