linux-kernel - [PATCH] x86: don't call dump_stack() from arch_trigger_all_cpu_backtrace

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Date:	Thu, 17 Feb 2011 15:47:37 +0000
From:	"Jan Beulich" <JBeulich@...ell.com>
To:	<mingo@...e.hu>, <tglx@...utronix.de>, <hpa@...or.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: don't call dump_stack() from
	 arch_trigger_all_cpu_backtrace_handler()

show_regs() already prints two(!) stack traces, no need for a third one.

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

---
 arch/x86/kernel/apic/hw_nmi.c |    1 -
 1 file changed, 1 deletion(-)

--- 2.6.38-rc5/arch/x86/kernel/apic/hw_nmi.c
+++ 2.6.38-rc5-x86-backtrace-all-no-dump_stack/arch/x86/kernel/apic/hw_nmi.c
@@ -83,7 +83,6 @@ arch_trigger_all_cpu_backtrace_handler(s
 		arch_spin_lock(&lock);
 		printk(KERN_WARNING "NMI backtrace for cpu %d\n", cpu);
 		show_regs(regs);
-		dump_stack();
 		arch_spin_unlock(&lock);
 		cpumask_clear_cpu(cpu, to_cpumask(backtrace_mask));
 		return NOTIFY_STOP;



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