linux-kernel - [PATCH 0/2] Allow crash dumps with crash_kexec_post

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Date:	Wed, 13 Jul 2016 14:19:50 +0200
From:	Petr Tesarik <ptesarik@...e.com>
To:	Juergen Gross <jgross@...e.com>,
	Josh Triplett <josh@...htriplett.org>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Eric Biederman <ebiederm@...ssion.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Dave Young <dyoung@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Vrabel <david.vrabel@...rix.com>
Cc:	"moderated list:XEN HYPERVISOR INTERFACE" 
	<xen-devel@...ts.xenproject.org>,
	"maintainer:X86 ARCHITECTURE 32-BIT AND 64-BIT" <x86@...nel.org>,
	"open list:KEXEC" <kexec@...ts.infradead.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/2] Allow crash dumps with crash_kexec_post_notifiers

Hello all,

this patch series makes it possible to save a kernel crash dump when the
kernel command line includes "crash_kexec_post_notifiers". 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(-)

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