lkml.org 
[lkml]   [2014]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] watchdog: add a parameter for stop wdt before register
On Wed, Jan 15, 2014 at 12:15:56PM +0000, One Thousand Gnomes wrote:
> > watchdog and crash dump really conflicts to some degree, from the watchdog
> > point of view it can reboot system whhen kdump kernel hangs. But from kdump
> > point of view it want ensure saving the vmcore for later debugging.
> >
> > Maybe we can only select only one in this case.
>
> You want to be able to make a decision at runtime which to use.
>
> > > - if it can be stopped, you can open and stop it
> >
> > For the last one since crashing happens we have no chance to open and stop.
>
> When you decide you need to set up to catch a core rather than just
> crash you can open and stop the watchdog (if supported), and you can then
> set up for a kdump and then at some point later if it crashes capture the
> dump.

Disabling watchdog if kdump serice starts will not make many happy. If
kernel hangs, we don't have a functionality to reboot it.

What about other idea of keeping watchdog interval long enough that new
kernel can boot, driver can load and then new driver/user space can
continue to kick the watchdog. And if second kernel hangs, watchdog will
reboot the system.

Thanks
Vivek


\
 
 \ /
  Last update: 2014-01-15 18:41    [W:0.051 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site