From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751150AbZKCOZd (ORCPT ); Tue, 3 Nov 2009 09:25:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750879AbZKCOZc (ORCPT ); Tue, 3 Nov 2009 09:25:32 -0500 Received: from mx1.redhat.com ([209.132.183.28]:57110 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750778AbZKCOZb (ORCPT ); Tue, 3 Nov 2009 09:25:31 -0500 Date: Tue, 3 Nov 2009 16:25:33 +0200 From: Gleb Natapov To: Marcelo Tosatti Cc: kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 03/11] Handle asynchronous page fault in a PV guest. Message-ID: <20091103142533.GN27911@redhat.com> References: <1257076590-29559-1-git-send-email-gleb@redhat.com> <1257076590-29559-4-git-send-email-gleb@redhat.com> <20091103141423.GC10084@amt.cnet> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20091103141423.GC10084@amt.cnet> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 03, 2009 at 12:14:23PM -0200, Marcelo Tosatti wrote: > On Sun, Nov 01, 2009 at 01:56:22PM +0200, Gleb Natapov wrote: > > Asynchronous page fault notifies vcpu that page it is trying to access > > is swapped out by a host. In response guest puts a task that caused the > > fault to sleep until page is swapped in again. When missing page is > > brought back into the memory guest is notified and task resumes execution. > > Can't you apply this to non-paravirt guests, and continue to deliver > interrupts while waiting for the swapin? > > It should allow the guest to schedule a different task. But how can I make the guest to not run the task that caused the fault? -- Gleb.