From: Akinobu Mita <akinobu.mita@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org, akpm@linux-foundation.org
Subject: [PATCH 2/2 -mmotm] debug-pagealloc: cannot depend on hibernation
Date: Tue, 10 Mar 2009 23:38:57 +0900 [thread overview]
Message-ID: <20090310143857.GB3151@localhost.localdomain> (raw)
In-Reply-To: <20090310143701.GA3151@localhost.localdomain>
The generic debug-pagealloc generates wrong messages for the page corruption
after hibernation. Because the free pages are not saved to the suspend image.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: <linux-arch@vger.kernel.org>
---
mm/Kconfig.debug | 5 +++++
1 file changed, 5 insertions(+)
Index: 2.6-mmotm/mm/Kconfig.debug
===================================================================
--- 2.6-mmotm.orig/mm/Kconfig.debug
+++ 2.6-mmotm/mm/Kconfig.debug
@@ -4,9 +4,14 @@ config WANT_PAGE_DEBUG_FLAGS
config PAGE_POISONING
bool "Debug page memory allocations"
depends on DEBUG_KERNEL && !ARCH_SUPPORTS_DEBUG_PAGEALLOC
+ depends on !HIBERNATION
select DEBUG_PAGEALLOC
select WANT_PAGE_DEBUG_FLAGS
help
Fill the pages with poison patterns after free_pages() and verify
the patterns before alloc_pages(). This results in a large slowdown,
but helps to find certain types of memory corruptions.
+
+ This option cannot enalbe with hibernation. Otherwise, it will get
+ wrong messages for memory corruption because the free pages are not
+ saved to the suspend image.
prev parent reply other threads:[~2009-03-10 14:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-10 14:37 [PATCH 1/2 -mmotm] debug-pagealloc: depend on CONFIG_DEBUG_KERNEL Akinobu Mita
2009-03-10 14:38 ` Akinobu Mita [this message]
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