linux-kernel - [PATCH Latency Tracer] don't panic on failed bootmem alloc

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Date:	Wed, 05 Dec 2007 23:41:33 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	RT <linux-rt-users@...r.kernel.org>
Subject: [PATCH Latency Tracer] don't panic on failed bootmem alloc

Ingo,

This patch prevents a panic on a failed bootmem alloc in the
initialization of the tracer buffers.

Signed-off-by: Steven Rostedt <srostedt@...hat.com>

Index: linux-2.6-latency/kernel/latency_trace.c
===================================================================
--- linux-2.6-latency.orig/kernel/latency_trace.c
+++ linux-2.6-latency/kernel/latency_trace.c
@@ -2720,10 +2720,11 @@ void * __init tracer_alloc_bootmem(unsig
 {
 	void * ret;
 
-	ret =__alloc_bootmem(size, SMP_CACHE_BYTES, ARCH_LOW_ADDRESS_LIMIT);
+	ret =__alloc_bootmem_nopanic(size, SMP_CACHE_BYTES,
+				     ARCH_LOW_ADDRESS_LIMIT);
 	if (ret != NULL && ((unsigned long)ret) < ARCH_LOW_ADDRESS_LIMIT) {
 		free_bootmem(__pa(ret), size);
-		ret = __alloc_bootmem(size,
+		ret = __alloc_bootmem_nopanic(size,
 				SMP_CACHE_BYTES,
 				__pa(MAX_DMA_ADDRESS));
 	}


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