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From: Harald Hoyer <harald-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Baoquan He <bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: initramfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: Does dracut need start watchdog?
Date: Fri, 09 Aug 2013 09:20:53 +0200	[thread overview]
Message-ID: <52049855.6050308@redhat.com> (raw)
In-Reply-To: <20130805101929.GA26184-je1gSBvt1Td8jiCoVU1BWR/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>

On 08/05/2013 12:19 PM, Baoquan He wrote:
> Hi Harald,
> 
> Since some drivers do the soft kicking. That is if BIOS has enabled
> watchdog, then kernel driver kicks the hardware till user space watchdog
> daemon comes along. This can help sove the problem in kdump which kdump
> kernel reboot before vmcore saving is finished. That problem is
> triggered because watchdog started in 1st kernel and timeout because of
> stopping being kicked.
> 
> I noticed in 04watchdog the watchdog.sh will start watchdog if
> /dev/watchdog exists. I am just wondering if it's needed to start
> watchdog by accessing /dev/watchdog. If starting watchdog is not needed,
> I want to make some code change of watchdog.sh.
> 
> What's your suggestion?
> 
> Baoquan
> Thanks a lot

Basically the 04watchdog module was used only in the testsuite. You might
consider to use the systemd watchdog feature instead.

http://0pointer.de/blog/projects/watchdog.html

or, if 0pointer is down again:

http://webcache.googleusercontent.com/search?q=cache:jYfJU_fFZy8J:0pointer.de/blog/projects/watchdog.html

  parent reply	other threads:[~2013-08-09  7:20 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-05 10:19 Does dracut need start watchdog? Baoquan He
     [not found] ` <20130805101929.GA26184-je1gSBvt1Td8jiCoVU1BWR/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
2013-08-09  7:20   ` Harald Hoyer [this message]
     [not found]     ` <52049855.6050308-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-12-10  8:21       ` Baoquan He
     [not found]         ` <52A6CF1C.50206-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-12-10 11:43           ` Harald Hoyer
     [not found]             ` <52A6FE79.3050000-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-12-11  7:58               ` Baoquan He
     [not found]                 ` <20131211075800.GD8495-je1gSBvt1TeLcxizHhUEZR/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
2013-12-16  2:53                   ` Baoquan He

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