linux-kernel - Re: [PATCH] watchdog: core: suppress "watchdog did not stop" message

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Message-ID: <12D0F3A5-602E-4C4B-908D-55C3C50823BB@fb.com>
Date:   Tue, 27 Nov 2018 06:11:46 +0000
From:   Tao Ren <taoren@...com>
To:     "Jerry.Hoemann@....com" <jerry.hoemann@....com>
CC:     Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        "linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "openbmc@...ts.ozlabs.org" <openbmc@...ts.ozlabs.org>
Subject: Re: [PATCH] watchdog: core: suppress "watchdog did not stop" message

On 11/26/18, 5:31 PM, "Jerry Hoemann" <jerry.hoemann@....com> wrote:
> Tao,
> 
> If you're on a system running systemd, the default behavior is to
> enable the watchdog during shutdown.  This guards against shutdown hanging.
> So this message will be routinely printed out during orderly shutdown.

Thank you Jerry for the comments.

I actually use a separate daemon process to kick the watchdog on my BMC system. The daemon monitors temperature sensors and other system states and kicks watchdog periodically: if the daemon gets stuck or exits, then the machine needs to reboot even if kernel/systemd is fine. Perhaps I need to look for a better/official way to manage the watchdog device..

BTW, I will be travelling abroad in the new few days and may not be able to reply emails timely. Thank you again for jumping in.

Best regards,
Tao Ren