linux-kernel - [PATCH] slub: dump more data on slab corruption

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Message-ID: <Pine.LNX.4.64.0807181729370.7723@sbz-30.cs.Helsinki.FI>
Date:	Fri, 18 Jul 2008 17:29:58 +0300 (EEST)
From:	Pekka J Enberg <penberg@...helsinki.fi>
To:	linux-kernel@...r.kernel.org
cc:	mingo@...e.hu, cl@...ux-foundation.org
Subject: [PATCH] slub: dump more data on slab corruption

From: Pekka Enberg <penberg@...helsinki.fi>

The limit to 128 bytes is too small when debugging slab corruption of the skb
cache, for example. Increase the limit to PAGE_SIZE to make debugging
corruptions sligthly easier.

Cc: Ingo Molnar <mingo@...e.hu>
Cc: Christoph Lameter <cl@...ux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@...helsinki.fi>
---
 mm/slub.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c	2008-07-18 17:26:01.000000000 +0300
+++ linux-2.6/mm/slub.c	2008-07-18 17:26:09.000000000 +0300
@@ -492,7 +492,7 @@
 	if (p > addr + 16)
 		print_section("Bytes b4", p - 16, 16);
 
-	print_section("Object", p, min(s->objsize, 128));
+	print_section("Object", p, min_t(unsigned long, s->objsize, PAGE_SIZE));
 
 	if (s->flags & SLAB_RED_ZONE)
 		print_section("Redzone", p + s->objsize,
--
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