Commit 62be73ea authored May 15, 2012 by Seiji Aguchi Committed by Ingo Molnar May 18, 2012

kdump: Execute kmsg_dump(KMSG_DUMP_PANIC) after smp_send_stop()

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 <seiji.aguchi@hds.com>
Acked-by: Don Zickus <dzickus@redhat.com>
Cc: dle-develop@lists.sourceforge.net <dle-develop@lists.sourceforge.net>
Cc: Satoru Moriya <satoru.moriya@hds.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: a.p.zijlstra@chello.nl <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/5C4C569E8A4B9B42A84A977CF070A35B2E4D7A5CE2@USINDEVS01.corp.hds.com

Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 2a01bb38

kernel/panic.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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);