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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090310143857.GB3151@localhost.localdomain \
--to=akinobu.mita@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.