Re: [Xen-devel] [PATCH 0/2] Allow crash dumps with crash_kexec_post_notifiers

[Petr Tesarik <ptesarik@xxxxxxx>]

On Wed, 13 Jul 2016 14:19:50 +0200
Petr Tesarik <ptesarik@xxxxxxxx> wrote:

> Hello all,
> 
> this patch series makes it possible to save a kernel crash dump when the
> kernel command line includes "crash_kexec_post_notifiers".

Oh ... I forgot to add: This only applies to running Linux under Xen.
If you run on bare metal, you can always save the dump already, as you
certainly know.

Petr T

> There might
> be other approaches, but mine has the advantage that no new sysctl is
> required, and the behaviour is the same whether panic notifiers are run
> or not: If you load a crash kernel with kexec, it will be used, otherwise
> the hypervisor facility is used (using a hypercall).
> 
> Feedback welcome!
> 
> Petr T
> 
> ---
> 
> Petr Tesarik (2):
>       Add a kexec_crash_loaded() function
>       Allow kdump with crash_kexec_post_notifiers
> 
> 
>  arch/x86/xen/enlighten.c |    3 ++-
>  include/linux/kexec.h    |    2 ++
>  kernel/kexec_core.c      |    5 +++++
>  kernel/ksysfs.c          |    2 +-
>  4 files changed, 10 insertions(+), 2 deletions(-)
> 
> --
> Signature
> 
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> kexec@xxxxxxxxxxxxxxxxxxx
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