From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 14 Jan 2008 15:28:53 +0000 From: Mel Gorman Subject: Re: [patch 09/19] (NEW) more aggressively use lumpy reclaim Message-ID: <20080114152853.GB20551@csn.ul.ie> References: <20080108205939.323955454@redhat.com> <20080108210007.257424941@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Rik van Riel , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On (08/01/08 14:30), Christoph Lameter didst pronounce: > On Tue, 8 Jan 2008, Rik van Riel wrote: > > > If normal pageout does not result in contiguous free pages for > > kernel stacks, fall back to lumpy reclaim instead of failing fork > > or doing excessive pageout IO. > > Good. Ccing Mel. This is going to help higher order pages which is useful > for a couple of other projects. > Well, the patch only has any impact when the order you are reclaiming is less than PAGE_ALLOC_COSTLY_ORDER so I would not have considered it of major impact to other projects interested in high order allocations. However, in isolation I have no problem with this patch and I can see how it makes sense for the problem scenario described. I rebased just this patch to 2.6.24-rc7 and found no problems but I have not had the chance to review the whole set. > Reviewed-by: Christoph Lameter > Acked-by: Mel Gorman -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab -- 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