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

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Date:	Fri, 11 Jun 2010 17:30:39 +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 Fri, Jun 11, 2010 at 5:17 PM, Catalin Marinas
<catalin.marinas@....com> wrote:
> Dave Young <hidave.darkstar@...il.com> wrote:
>> On Thu, Jun 10, 2010 at 7:21 PM, Catalin Marinas
>> <catalin.marinas@....com> wrote:
>>> 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).
>>
>> I didn't see difference before/after apply your patch, how to test
>> specific to bootmem?
>
> With Rik's patch applied and CONFIG_NOBOOTMEM enabled, do you get any
> false postives if my kmemleak patch isn't applied?

No more, except a few acpi issue which always there

>
> Thanks.
>
> --
> Catalin
>



-- 
Regards
dave
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