Getting the kexec on panic
Lluís Batlle i Rossell
viric at viric.name
Fri Sep 7 05:41:20 EDT 2012
On Fri, Sep 07, 2012 at 05:34:33PM +0800, Dave Young wrote:
> On 09/07/2012 06:06 AM, Jerry Snitselaar wrote:
> > 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 from Jacob Shin and see if it resolves the problem for you if you are experiencing your problem on a 3.5-rc1+ kernel.
> >  https://lkml.org/lkml/2012/8/24/474
> He has updated the v5 patch set as below:
I was in 3.5.2 when I tried. Ok, I see these are very recent... I may prepare a
build including that.
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