linux-kernel - [PATCH] conditionalize call from panic() to smp_send

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Message-Id: <496DE7CD.76E4.0078.0@novell.com>
Date:	Wed, 14 Jan 2009 12:25:33 +0000
From:	"Jan Beulich" <jbeulich@...ell.com>
To:	<linux-kernel@...r.kernel.org>
Subject: [PATCH] conditionalize call from panic() to smp_send_stop()

... avoiding nested warnings and/or oopses as much as possible (namely
durin early boot).

Signed-off-by: Jan Beulich <jbeulich@...ell.com>

---
 kernel/panic.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- linux-2.6.29-rc1/kernel/panic.c	2009-01-14 11:36:29.000000000 +0100
+++ 2.6.29-rc1-panic-conditional-stop/kernel/panic.c	2009-01-06 17:02:49.000000000 +0100
@@ -89,7 +89,8 @@ NORET_TYPE void panic(const char * fmt, 
 	 * unfortunately means it may not be hardened to work in a panic
 	 * situation.
 	 */
-	smp_send_stop();
+	if (num_online_cpus() > 1)
+		smp_send_stop();
 #endif
 
 	atomic_notifier_call_chain(&panic_notifier_list, 0, buf);



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