From mboxrd@z Thu Jan  1 00:00:00 1970
From: yalin wang <yalin.wang2010@gmail.com>
Subject: Re: [PATCH v4 2/3] mm/page_alloc.c: add config option to sanitize
 freed pages
Date: Tue, 19 May 2015 09:58:01 +0800
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To: Anisse Astier <anisse@astier.eu>
Cc: Pavel Machek <pavel@ucw.cz>, Andrew Morton <akpm@linux-foundation.org>, Mel Gorman <mgorman@suse.de>, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, David Rientjes <rientjes@google.com>, Alan Cox <gnomes@lxorguk.ukuu.org.uk>, Linus Torvalds <torvalds@linux-foundation.org>, Peter Zijlstra <peterz@infradead.org>, PaX Team <pageexec@freemail.hu>, Brad Spengler <spender@grsecurity.net>, Kees Cook <keescook@chromium.org>, Andi Kleen <andi@firstfloor.org>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Len Brown <len.brown@intel.com>, linux-mm@kvack.org, Linux PM list <linux-pm@vger.kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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2015-05-18 21:04 GMT+08:00 Anisse Astier <anisse@astier.eu>:
> On Mon, May 18, 2015 at 3:02 PM, Pavel Machek <pavel@ucw.cz> wrote:
>>
>> Ok. So there is class of errors where this helps, but you are not
>> aware of any such errors in kernel, so you can't fix them... Right?
>
> Correct.
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i feel your patch is the same as CONFIG_DEBUG_PAGEALLOC ,
the difference is that CONFIG_DEBUG_PAGEALLOC  will clear
page to a magic number, while your patch will
clear to zero,
do we really need this duplicated function ?

Thanks