Autodumping on panic
Jeremie Le Hen
jeremie at le-hen.org
Sun Mar 4 20:36:17 UTC 2007
Hi, Eric,
On Sun, Mar 04, 2007 at 02:21:54PM -0600, Eric Anderson wrote:
> On 03/02/07 15:04, Jeremie Le Hen wrote:
> >I've just changed my window manager, and I'm experiencing a few issues
> >with it. This may be a panic but I can't be sure for now. Indeed I
> >don't have a serial port on my laptop.
> >
> >I'm sure it is possible to ask the kernel to call doadump()
> >automatically on panic, but I can't remember how. Please, could you
> >give me the correct way to do it ?
>
>
> Any word on this? I'd love to set this up too. Would be nice to
> auto-dump+reset on servers..
Robert Watson replied me privately. Hereafter you will find my reply:
On Sat, Mar 03, 2007 at 03:12:53PM +0100, Jeremie Le Hen wrote:
> On Sat, Mar 03, 2007 at 12:35:43PM +0000, Robert Watson wrote:
> > You may be able to set the "unattended" sysctl or kernel compile option to
> > cause it to panic and reboot rather than dropping into DDB. However, I'm
> > not in front of a box I can test that on right now, so I'm replying
> > privately in case I'm completely wrong :-).
>
> Thank you for your reply. I've checked the code in kern_shutdown.c and
> indeed KDB_UNATTENDED sets the default value of debug.debugger_on_panic
> to 0. In case we didn't drop to the debugger, doadump() is called,
> this is what I want. Actually turning off the sysctl manually should
> also do it.
I hope this wille help.
Regards,
--
Jeremie Le Hen
< jeremie at le-hen dot org >< ttz at chchile dot org >
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