From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Chinner Subject: Re: [PATCH v13 13/16] vmscan: take at least one pass with shrinkers Date: Tue, 10 Dec 2013 15:18:26 +1100 Message-ID: <20131210041826.GB31386@dastard> References: <5287164773f8aade33ce17f3c91546c6e1afaf85.1386571280.git.vdavydov@parallels.com> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <5287164773f8aade33ce17f3c91546c6e1afaf85.1386571280.git.vdavydov@parallels.com> Sender: owner-linux-mm@kvack.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Vladimir Davydov Cc: dchinner@redhat.com, hannes@cmpxchg.org, mhocko@suse.cz, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, devel@openvz.org, glommer@openvz.org, glommer@gmail.com, Glauber Costa , Mel Gorman , Rik van Riel On Mon, Dec 09, 2013 at 12:05:54PM +0400, Vladimir Davydov wrote: > From: Glauber Costa > > In very low free kernel memory situations, it may be the case that we > have less objects to free than our initial batch size. If this is the > case, it is better to shrink those, and open space for the new workload > then to keep them and fail the new allocations. > > In particular, we are concerned with the direct reclaim case for memcg. > Although this same technique can be applied to other situations just as > well, we will start conservative and apply it for that case, which is > the one that matters the most. This should be at the start of the series. Cheers, Dave. -- Dave Chinner david@fromorbit.com -- 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