From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx149.postini.com [74.125.245.149]) by kanga.kvack.org (Postfix) with SMTP id 4C3476B0031 for ; Sun, 4 Aug 2013 19:49:32 -0400 (EDT) Date: Mon, 5 Aug 2013 08:50:11 +0900 From: Minchan Kim Subject: Re: Possible deadloop in direct reclaim? Message-ID: <20130804235011.GH32486@bbox> 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> <51FD7483.5060504@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <51FD7483.5060504@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: KOSAKI Motohiro Cc: Bob Liu , Lisa Du , Christoph Lameter , "linux-mm@kvack.org" , Mel Gorman , Bob Liu Hi KOSAKI, On Sat, Aug 03, 2013 at 05:22:11PM -0400, KOSAKI Motohiro wrote: > (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. Just FYI, Now Lisa am working on it and have a plan to resend more concrete description based on your old version. Thanks. -- Kind regards, Minchan Kim -- 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