From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with SMTP id 214116B0044 for ; Thu, 17 Dec 2009 22:29:50 -0500 (EST) Message-ID: <4B2AF6F8.7070103@redhat.com> Date: Thu, 17 Dec 2009 22:28:56 -0500 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH 00 of 28] Transparent Hugepage support #2 References: <4B2A8D83.30305@redhat.com> <4B2A98E6.5080406@sgi.com> In-Reply-To: <4B2A98E6.5080406@sgi.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Mike Travis Cc: Christoph Lameter , Andrea Arcangeli , linux-mm@kvack.org, Marcelo Tosatti , Adam Litke , Avi Kivity , Izik Eidus , Hugh Dickins , Nick Piggin , Mel Gorman , Andi Kleen , Dave Hansen , Benjamin Herrenschmidt , Ingo Molnar , KAMEZAWA Hiroyuki , Chris Wright , Andrew Morton List-ID: On 12/17/2009 03:47 PM, Mike Travis wrote: > Rik van Riel wrote: >> Christoph Lameter wrote: >> Christoph, we need a way to swap these anonymous huge >> pages. You make it look as if you just want the >> anonymous huge pages and a way to then veto any attempts >> to make them swappable (on account of added overhead). > > On very large SMP systems with huge amounts of memory, the > gains from huge pages will be significant. And swapping > will not be an issue. I agree that the two should be > split up and perhaps even make swapping an option? With virtualization, people generally want to oversubscribe their systems a little bit. This makes swapping pretty much a mandatory feature. -- All rights reversed. -- 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