From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx176.postini.com [74.125.245.176]) by kanga.kvack.org (Postfix) with SMTP id A4BA16B004A for ; Tue, 20 Mar 2012 07:07:44 -0400 (EDT) Message-ID: <1332241633.18960.406.camel@twins> Subject: Re: [RFC][PATCH 00/26] sched/numa From: Peter Zijlstra Date: Tue, 20 Mar 2012 12:07:13 +0100 In-Reply-To: <4F686163.40509@redhat.com> References: <20120316144028.036474157@chello.nl> <4F670325.7080700@redhat.com> <1332155527.18960.292.camel@twins> <4F671B90.3010209@redhat.com> <1332158992.18960.316.camel@twins> <4F672384.1030601@redhat.com> <1332187387.18960.389.camel@twins> <4F685960.4080904@redhat.com> <1332240525.18960.403.camel@twins> <4F686163.40509@redhat.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: Avi Kivity Cc: Linus Torvalds , Andrew Morton , Thomas Gleixner , Ingo Molnar , Paul Turner , Suresh Siddha , Mike Galbraith , "Paul E. McKenney" , Lai Jiangshan , Dan Smith , Bharata B Rao , Lee Schermerhorn , Andrea Arcangeli , Rik van Riel , Johannes Weiner , linux-kernel@vger.kernel.org, linux-mm@kvack.org On Tue, 2012-03-20 at 12:52 +0200, Avi Kivity wrote: > You use the dma engine for eager copying, not on demand. Sure, but during that time no access to that entire vma is allowed, so you have to unmap it, and any fault in there will have to wait for the entire copy to complete. Or am I misunderstanding how things would work? -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org