From mboxrd@z Thu Jan  1 00:00:00 1970
From: dwalker-zu3NM2574RrQT0dZR+AlfA@public.gmane.org
Subject: Re: [PATCH 1/3] panic: Disable crash_kexec_post_notifiers if kdump
 is not available
Date: Tue, 14 Jul 2015 13:59:19 +0000
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To: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
Cc: Hidehiro Kawai <hidehiro.kawai.ez-FCd8Q96Dh0JBDgjK7y7TUQ@public.gmane.org>, Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>, Vivek Goyal <vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, linux-mips-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org, Baoquan He <bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, HATAYAMA Daisuke <d.hatayama-+CUm20s59erQFUHtdCDX3A@public.gmane.org>, Masami Hiramatsu <masami.hiramatsu.pt-FCd8Q96Dh0JBDgjK7y7TUQ@public.gmane.org>, linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, linux-metag-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org

On Mon, Jul 13, 2015 at 08:19:45PM -0500, Eric W. Biederman wrote:
> dwalker-zu3NM2574RrQT0dZR+AlfA@public.gmane.org writes:
> 
> > On Fri, Jul 10, 2015 at 08:41:28AM -0500, Eric W. Biederman wrote:
> >> Hidehiro Kawai <hidehiro.kawai.ez-FCd8Q96Dh0JBDgjK7y7TUQ@public.gmane.org> writes:
> >> 
> >> > You can call panic notifiers and kmsg dumpers before kdump by
> >> > specifying "crash_kexec_post_notifiers" as a boot parameter.
> >> > However, it doesn't make sense if kdump is not available.  In that
> >> > case, disable "crash_kexec_post_notifiers" boot parameter so that
> >> > you can't change the value of the parameter.
> >> 
> >> Nacked-by: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
> >
> > I think it would make sense if he just replaced "kdump" with "kexec".
> 
> It would be less insane, however it still makes no sense as without
> kexec on panic support crash_kexec is a noop.  So the value of the
> seeting makes no difference.

Can you explain more, I don't really understand what you mean. Are you suggesting
the whole "crash_kexec_post_notifiers" feature has no value ?

Daniel