From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753415AbXJaBYe (ORCPT ); Tue, 30 Oct 2007 21:24:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752249AbXJaBY1 (ORCPT ); Tue, 30 Oct 2007 21:24:27 -0400 Received: from gatekeeper.ncic.ac.cn ([159.226.41.188]:57833 "HELO ac.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1752197AbXJaBY0 (ORCPT ); Tue, 30 Oct 2007 21:24:26 -0400 Message-ID: <4727D926.6050004@sina.com.cn> Date: Wed, 31 Oct 2007 09:23:50 +0800 From: tgh User-Agent: Thunderbird 1.5.0.7 (Windows/20060909) MIME-Version: 1.0 To: Jeremy Fitzhardinge CC: Xen-devel , Jeremy Fitzhardinge , lkml , Andi Kleen , Chris Wright , Andrew Morton Subject: Re: [Xen-devel] [patch 30/44] xen: Add support for preemption References: <20070716231536.937393000@xensource.com>> <20070716232915.672717000@xensource.com>> <4726F51C.4030709@sina.com.cn> <4727690F.4030502@goop.org> In-Reply-To: <4727690F.4030502@goop.org> Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Thank for your reply and I still have several questions > Yes, that's the normal mode of operation. The hypervisor will timeslice > multiple vcpus onto a single vcpu. > that is ,the VM could be preempted by xen,and could xen hypervisor also be preempted to reschedule other vm or xen kernel thread?and are there the counterpart abstractions in xen for kernel thread in linux? > This patch doesn't relate to that; it's whether a Xen Linux guest's > kernel can be preempted to reschedule processes while running under Xen. > that is ,the patch makes the guest's kernel, rather than xen, be able to be preempted ,is it right? Thanks in advance > The normal xen-unstable or vendor Xen kernels don't support this, but > the mainline kernel with paravirt_ops/xen support does. > > J > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel > > >