From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx151.postini.com [74.125.245.151]) by kanga.kvack.org (Postfix) with SMTP id B8CEC6B0031 for ; Sat, 3 Aug 2013 17:22:08 -0400 (EDT) Received: by mail-qa0-f52.google.com with SMTP id bq6so305563qab.4 for ; Sat, 03 Aug 2013 14:22:07 -0700 (PDT) Message-ID: <51FD7483.5060504@gmail.com> Date: Sat, 03 Aug 2013 17:22:11 -0400 From: KOSAKI Motohiro 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> <51F9E265.7030503@oracle.com> In-Reply-To: <51F9E265.7030503@oracle.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Bob Liu Cc: KOSAKI Motohiro , Lisa Du , Christoph Lameter , "linux-mm@kvack.org" , Mel Gorman , Bob Liu (8/1/13 12:21 AM), Bob Liu wrote: > 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. Just because I misunderstood the patch has already been merged. OK, I'll resend this. -- 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