From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f173.google.com (mail-wi0-f173.google.com [209.85.212.173]) by kanga.kvack.org (Postfix) with ESMTP id 733B96B0038 for ; Tue, 25 Nov 2014 06:32:35 -0500 (EST) Received: by mail-wi0-f173.google.com with SMTP id r20so8831610wiv.0 for ; Tue, 25 Nov 2014 03:32:35 -0800 (PST) Received: from mx2.suse.de (cantor2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id dh10si15853923wib.80.2014.11.25.03.32.34 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 25 Nov 2014 03:32:34 -0800 (PST) Date: Tue, 25 Nov 2014 11:32:26 +0000 From: Mel Gorman Subject: Re: [Lsf-pc] [LSF/MM TOPIC] Improving CMA Message-ID: <20141125113225.GH2725@suse.de> References: <5473E146.7000503@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <5473E146.7000503@codeaurora.org> Sender: owner-linux-mm@kvack.org List-ID: To: Laura Abbott Cc: lsf-pc@lists.linux-foundation.org, linux-mm@kvack.org, SeongJae Park , minchan@kernel.org, zhuhui@xiaomi.com, iamjoonsoo.kim@lge.com, gioh.kim@lge.com On Mon, Nov 24, 2014 at 05:54:14PM -0800, Laura Abbott wrote: > There have been a number of patch series posted designed to improve various > aspects of CMA. A sampling: > > https://lkml.org/lkml/2014/10/15/623 > http://marc.info/?l=linux-mm&m=141571797202006&w=2 > https://lkml.org/lkml/2014/6/26/549 > > As far as I can tell, these are all trying to fix real problems with CMA but > none of them have moved forward very much from what I can tell. The goal of > this session would be to come out with an agreement on what are the biggest > problems with CMA and the best ways to solve them. > I think this is a good topic. Some of the issues have been brought up before at LSF/MM but they never made that much traction so it's worth revisiting. I haven't been paying close attention to the mailing list discussions but I've been a little worried that the page allocator paths are turning into a bigger and bigger mess. I'm also a bit worried that options such as migrating pages out of CMA areas that are about to be pinned for having callback options to forcibly free pages never went anywhere. -- Mel Gorman 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