From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120620173023.095194599@linuxfoundation.org> Date: Wed, 20 Jun 2012 10:30:45 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Seiji Aguchi , Don Zickus , "dle-develop@lists.sourceforge.net" , Satoru Moriya , Tony Luck , "a.p.zijlstra@chello.nl" , Ingo Molnar Subject: [ 25/61] kdump: Execute kmsg_dump(KMSG_DUMP_PANIC) after smp_send_stop() In-Reply-To: <20120620173033.GA5634@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Seiji Aguchi commit 62be73eafaa045d3233337303fb140f7f8a61135 upstream. This patch moves kmsg_dump(KMSG_DUMP_PANIC) below smp_send_stop(), to serialize the crash-logging process via smp_send_stop() and to thus retrieve a more stable crash image of all CPUs stopped. Signed-off-by: Seiji Aguchi Acked-by: Don Zickus Cc: dle-develop@lists.sourceforge.net Cc: Satoru Moriya Cc: Tony Luck Cc: a.p.zijlstra@chello.nl Link: http://lkml.kernel.org/r/5C4C569E8A4B9B42A84A977CF070A35B2E4D7A5CE2@USINDEVS01.corp.hds.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- kernel/panic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/kernel/panic.c +++ b/kernel/panic.c @@ -108,8 +108,6 @@ void panic(const char *fmt, ...) */ crash_kexec(NULL); - kmsg_dump(KMSG_DUMP_PANIC); - /* * Note smp_send_stop is the usual smp shutdown function, which * unfortunately means it may not be hardened to work in a panic @@ -117,6 +115,8 @@ void panic(const char *fmt, ...) */ smp_send_stop(); + kmsg_dump(KMSG_DUMP_PANIC); + atomic_notifier_call_chain(&panic_notifier_list, 0, buf); bust_spinlocks(0);