From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id CE1346001DA for ; Thu, 28 Jan 2010 13:07:56 -0500 (EST) Date: Thu, 28 Jan 2010 18:07:42 +0000 From: Mel Gorman Subject: Re: [PATCH 25 of 31] transparent hugepage core Message-ID: <20100128180742.GG7139@csn.ul.ie> References: <20100128175753.GF7139@csn.ul.ie> <4B61D1E6.6020507@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <4B61D1E6.6020507@redhat.com> Sender: owner-linux-mm@kvack.org To: Rik van Riel Cc: Andrea Arcangeli , linux-mm@kvack.org, Marcelo Tosatti , Adam Litke , Avi Kivity , Izik Eidus , Hugh Dickins , Nick Piggin , Dave Hansen , Benjamin Herrenschmidt , Ingo Molnar , Mike Travis , KAMEZAWA Hiroyuki , Christoph Lameter , Chris Wright , Andrew Morton , bpicco@redhat.com, Christoph Hellwig , KOSAKI Motohiro , Balbir Singh , Arnd Bergmann List-ID: On Thu, Jan 28, 2010 at 01:05:26PM -0500, Rik van Riel wrote: > On 01/28/2010 12:57 PM, Mel Gorman wrote: >> Sorry for the long delay getting to this patch. I ran out of beans the >> first time around. Unlike Rik, I can't handle 31 patches in one sitting. >> >> On Thu, Jan 28, 2010 at 03:33:39PM +0100, Andrea Arcangeli wrote: >>> From: Andrea Arcangeli >>> >>> Lately I've been working to make KVM use hugepages transparently >>> without the usual restrictions of hugetlbfs. Some of the restrictions >>> I'd like to see removed: >>> >>> 1) hugepages have to be swappable or the guest physical memory remains >>> locked in RAM and can't be paged out to swap >>> >> >> It occurs to me that this infrastructure should be reusable to make allow >> optional swapping of hugetlbfs. I haven't investigated the possibility properly >> but it should be doable as a mount option with maybe a boot-parameter for >> shared memory. > > I agree that would be nice. However, as you noticed above this > patch set is quite large already. Merging the infrastructure from > hugetlb and the anonymous hugepages is probably better done in a > follow up patch series, since the two are pretty different beasts > at this point. > Fully agreed on all counts. -- 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