linux-kernel - Re: [PATCH -mm] only drop root anon

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Message-ID: <AANLkTikl2Lp6dhDIN2NpyZHJne_vhOYJrwwBGebkslCf@mail.gmail.com>
Date:	Fri, 11 Jun 2010 16:08:08 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org
Subject: Re: [PATCH -mm] only drop root anon_vma if not self

On Thu, Jun 10, 2010 at 7:21 PM, Catalin Marinas
<catalin.marinas@....com> wrote:
> Dave,
>
> On Thu, 2010-06-10 at 02:30 +0100, Dave Young wrote:
>> On Thu, Jun 10, 2010 at 9:16 AM, Rik van Riel <riel@...hat.com> wrote:
>> > On Wed, 9 Jun 2010 17:19:02 +0800
>> > Dave Young <hidave.darkstar@...il.com> wrote:
>> >
>> >> > Manually bisected mm patches, the memleak caused by following patch:
>> >> >
>> >> > mm-extend-ksm-refcounts-to-the-anon_vma-root.patch
>> >>
>> >>
>> >> So I guess the refcount break, either drop-without-get or over-drop
>> >
>> > I'm guessing I did not run the kernel with enough debug options enabled
>> > when I tested my patches...
>> >
>> > Dave & Catalin, thank you for tracking this down.
>> >
>> > Dave, does the below patch fix your issue?
>>
>> Yes, it fixed the issue. Thanks.
>
> Thanks for investigating this issue.
>
> BTW, without my kmemleak nobootmem patch (and CONFIG_NOBOOTMEM enabled),
> do you get other leaks (false positives).

Hi, catalin

I didn't see difference before/after apply your patch, how to test
specific to bootmem?

> If my patch fixes the
> nobootmem problem, can I add a Tested-by: Dave Young?
>
> Thanks.
>
> --
> Catalin
>
>



-- 
Regards
dave
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