From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f199.google.com (mail-wr0-f199.google.com [209.85.128.199]) by kanga.kvack.org (Postfix) with ESMTP id D296444084A for ; Mon, 10 Jul 2017 13:09:38 -0400 (EDT) Received: by mail-wr0-f199.google.com with SMTP id z45so25843008wrb.13 for ; Mon, 10 Jul 2017 10:09:38 -0700 (PDT) Received: from mx1.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id e3si6934063wmd.89.2017.07.10.10.09.37 for (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 10 Jul 2017 10:09:37 -0700 (PDT) Date: Mon, 10 Jul 2017 19:09:34 +0200 From: Michal Hocko Subject: Re: [PATCH] mm, vmscan: do not loop on too_many_isolated for ever Message-ID: <20170710170933.GE7071@dhcp22.suse.cz> References: <20170710074842.23175-1-mhocko@kernel.org> <1499695083.6130.38.camel@redhat.com> <20170710165859.GA12036@cmpxchg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170710165859.GA12036@cmpxchg.org> Sender: owner-linux-mm@kvack.org List-ID: To: Johannes Weiner Cc: Rik van Riel , Andrew Morton , Mel Gorman , Tetsuo Handa , Vlastimil Babka , linux-mm@kvack.org, LKML On Mon 10-07-17 12:58:59, Johannes Weiner wrote: > On Mon, Jul 10, 2017 at 09:58:03AM -0400, Rik van Riel wrote: > > On Mon, 2017-07-10 at 09:48 +0200, Michal Hocko wrote: > > > > > Johannes and Rik had some concerns that this could lead to premature > > > OOM kills. I agree with them that we need a better throttling > > > mechanism. Until now we didn't give the issue described above a high > > > priority because it usually required a really insane workload to > > > trigger. But it seems that the issue can be reproduced also without > > > having an insane number of competing threads [3]. > > > > My worries stand, but lets fix the real observed bug, and not worry > > too much about the theoretical bug for now. > > > > Acked-by: Rik van Riel > > I agree with this. > > Acked-by: Johannes Weiner Thanks to both of you. Just to make it clear. I really do want to address the throttling problem longterm properly. I do not have any great ideas to be honest. I am busy with other things so it might be quite some time before I come up with something. -- Michal Hocko SUSE Labs -- 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