From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx179.postini.com [74.125.245.179]) by kanga.kvack.org (Postfix) with SMTP id C98DF6B0031 for ; Thu, 1 Aug 2013 00:22:09 -0400 (EDT) Message-ID: <51F9E265.7030503@oracle.com> Date: Thu, 01 Aug 2013 12:21:57 +0800 From: Bob Liu MIME-Version: 1.0 Subject: Re: Possible deadloop in direct reclaim? References: <89813612683626448B837EE5A0B6A7CB3B62F8F272@SC-VEXCH4.marvell.com> <000001400d38469d-a121fb96-4483-483a-9d3e-fc552e413892-000000@email.amazonses.com> <89813612683626448B837EE5A0B6A7CB3B62F8F5C3@SC-VEXCH4.marvell.com> <89813612683626448B837EE5A0B6A7CB3B62F8FE33@SC-VEXCH4.marvell.com> <51F69BD7.2060407@gmail.com> <89813612683626448B837EE5A0B6A7CB3B630BDF99@SC-VEXCH4.marvell.com> <51F9CBC0.2020006@gmail.com> In-Reply-To: <51F9CBC0.2020006@gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: KOSAKI Motohiro Cc: Lisa Du , Christoph Lameter , "linux-mm@kvack.org" , Mel Gorman , Bob Liu Hi KOSAKI, On 08/01/2013 10:45 AM, KOSAKI Motohiro wrote: > > Please read more older code. Your pointed code is temporary change and I > changed back for fixing > bugs. > If you look at the status in middle direct reclaim, we can't avoid race > condition from multi direct > reclaim issues. Moreover, if kswapd doesn't awaken, it is a problem. > This is a reason why current code > behave as you described. > I agree we should fix your issue as far as possible. But I can't agree > your analysis. > I found this thread: mm, vmscan: fix do_try_to_free_pages() livelock https://lkml.org/lkml/2012/6/14/74 I think that's the same issue Lisa met. But I didn't find out why your patch didn't get merged? There were already many acks. -- Regards, -Bob -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org