From mboxrd@z Thu Jan 1 00:00:00 1970 From: ebiederm@xmission.com (Eric W. Biederman) Date: Mon, 13 Jul 2015 20:19:45 -0500 Subject: [PATCH 1/3] panic: Disable crash_kexec_post_notifiers if kdump is not available In-Reply-To: <20150713202611.GA16525@fifo99.com> (dwalker@fifo99.com's message of "Mon, 13 Jul 2015 20:26:11 +0000") References: <20150710113331.4368.10495.stgit@softrs> <20150710113331.4368.63745.stgit@softrs> <87wpy82kqf.fsf@x220.int.ebiederm.org> <20150713202611.GA16525@fifo99.com> Message-ID: <87h9p7r0we.fsf@x220.int.ebiederm.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org dwalker at fifo99.com writes: > On Fri, Jul 10, 2015 at 08:41:28AM -0500, Eric W. Biederman wrote: >> Hidehiro Kawai 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" > > 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. Eric