linux-kernel - Re: [PATCH 0/8] Volatile Ranges (v8?)

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Date:	Tue, 18 Jun 2013 12:59:02 -0400
From:	Dhaval Giani <dgiani@...illa.com>
To:	Minchan Kim <minchan@...nel.org>
CC:	John Stultz <john.stultz@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Android Kernel Team <kernel-team@...roid.com>,
	Robert Love <rlove@...gle.com>, Mel Gorman <mel@....ul.ie>,
	Hugh Dickins <hughd@...gle.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Rik van Riel <riel@...hat.com>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	Dave Chinner <david@...morbit.com>, Neil Brown <neilb@...e.de>,
	Andrea Righi <andrea@...terlinux.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Mike Hommey <mh@...ndium.org>, Taras Glek <tglek@...illa.com>,
	Jan Kara <jack@...e.cz>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Michel Lespinasse <walken@...gle.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH 0/8] Volatile Ranges (v8?)

On 2013-06-18 12:11 AM, Minchan Kim wrote:
> Hello Dhaval,
>
> On Mon, Jun 17, 2013 at 12:24:07PM -0400, Dhaval Giani wrote:
>> Hi John,
>>
>> I have been giving your git tree a whirl, and in order to simulate a
>> limited memory environment, I was using memory cgroups.
>>
>> The program I was using to test is attached here. It is your test
>> code, with some changes (changing the syscall interface, reducing
>> the memory pressure to be generated).
>>
>> I trapped it in a memory cgroup with 1MB memory.limit_in_bytes and hit this,
>>
>> [  406.207612] ------------[ cut here ]------------
>> [  406.207621] kernel BUG at mm/vrange.c:523!
>> [  406.207626] invalid opcode: 0000 [#1] SMP
>> [  406.207631] Modules linked in:
>> [  406.207637] CPU: 0 PID: 1579 Comm: volatile-test Not tainted
> Thanks for the testing!
> Does below patch fix your problem?

Yes it does! Thank you very much for the patch.

Thanks!
Dhaval
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