Getting the kexec on panic

[Jerry Snitselaar]

On Thu Sep 06 12, Lluís Batlle i Rossell wrote:
> Hello,
> 
> while I can load immediately a kernel using kexec, when I set it for panic and
> crash with sysrq-c, the computer hangs.
> 
> I'm using the nvidia X driver; can it be that it stops the panic handling from
> working? I don't understand why it would work with normal kexec though, if it
> were the case.
> 
> Regards,
> Lluís.

Hi Lluis,


What kernel are you using? The commit 722bc6b "x86/mm: Fix the size calculation of mapping tables" which started showing up in 3.5-rc1 causes problems for the crash kernel. You might try this patchset[1] from Jacob Shin and see if it resolves the problem for you if you are experiencing your problem on a 3.5-rc1+ kernel.

[1] https://lkml.org/lkml/2012/8/24/474

Regards,
Jerry

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