From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753485Ab0JGRsp (ORCPT ); Thu, 7 Oct 2010 13:48:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:13684 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751717Ab0JGRsn (ORCPT ); Thu, 7 Oct 2010 13:48:43 -0400 Message-ID: <4CAE07E1.5050701@redhat.com> Date: Thu, 07 Oct 2010 13:48:17 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.8) Gecko/20100806 Fedora/3.1.2-1.fc13 Lightning/1.0b2pre Thunderbird/3.1.2 MIME-Version: 1.0 To: Avi Kivity CC: Gleb Natapov , kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, mingo@elte.hu, a.p.zijlstra@chello.nl, tglx@linutronix.de, hpa@zytor.com, cl@linux-foundation.org, mtosatti@redhat.com Subject: Re: [PATCH v6 08/12] Handle async PF in a guest. References: <1286207794-16120-1-git-send-email-gleb@redhat.com> <1286207794-16120-9-git-send-email-gleb@redhat.com> <4CADC6C3.3040305@redhat.com> <20101007171418.GA2397@redhat.com> <4CAE00CB.1070400@redhat.com> In-Reply-To: <4CAE00CB.1070400@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/07/2010 01:18 PM, Avi Kivity wrote: > On 10/07/2010 07:14 PM, Gleb Natapov wrote: >> Host side keeps track of outstanding apfs and will not send apf for the >> same phys address twice. It will halt vcpu instead. > > What about different pages, running the scheduler code? > > Oh, and we'll run the scheduler recursively. When preempt is disabled in the guest, it will not invoke the "reschedule for apf" code, but it will simply turn into a normal page fault. Last I looked, the scheduler code disabled preempt (for obvious reasons). -- All rights reversed