From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760130AbXGKGSQ (ORCPT ); Wed, 11 Jul 2007 02:18:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755143AbXGKGSF (ORCPT ); Wed, 11 Jul 2007 02:18:05 -0400 Received: from il.qumranet.com ([82.166.9.18]:53715 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753972AbXGKGSD (ORCPT ); Wed, 11 Jul 2007 02:18:03 -0400 Message-ID: <46946FB9.5040705@qumranet.com> Date: Wed, 11 Jul 2007 08:50:49 +0300 From: Avi Kivity User-Agent: Thunderbird 2.0.0.0 (X11/20070419) MIME-Version: 1.0 To: Rusty Russell CC: Ingo Molnar , kvm-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: Re: [kvm-devel] [PATCH][RFC] kvm-scheduler integration References: <11838994974161-git-send-email-avi@qumranet.com> <20070708133539.GA12597@elte.hu> <4690E973.7000606@qumranet.com> <20070708134850.GB22911@elte.hu> <1183937563.6005.365.camel@localhost.localdomain> <4691D82F.3030401@qumranet.com> <1184029745.6005.402.camel@localhost.localdomain> <46931ECB.2060601@qumranet.com> <1184050055.6005.523.camel@localhost.localdomain> <469332F3.1000808@qumranet.com> In-Reply-To: <469332F3.1000808@qumranet.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Avi Kivity wrote: > >> The >> congruent case which comes to mind is lazy FPU handling. >> > > That one has preempt_ops in hardware: cr0.ts and #NM. However, that doesn't handle in-kernel use of the fpu. kernel_fpu_begin()/kernel_fpu_end() could easily be modified to take advantage of a generic preempt hook. I'll add a patch for that, and we gain preemptible raid-5 parity calculation. -- error compiling committee.c: too many arguments to function From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH][RFC] kvm-scheduler integration Date: Wed, 11 Jul 2007 08:50:49 +0300 Message-ID: <46946FB9.5040705@qumranet.com> References: <11838994974161-git-send-email-avi@qumranet.com> <20070708133539.GA12597@elte.hu> <4690E973.7000606@qumranet.com> <20070708134850.GB22911@elte.hu> <1183937563.6005.365.camel@localhost.localdomain> <4691D82F.3030401@qumranet.com> <1184029745.6005.402.camel@localhost.localdomain> <46931ECB.2060601@qumranet.com> <1184050055.6005.523.camel@localhost.localdomain> <469332F3.1000808@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Rusty Russell Return-path: In-Reply-To: <469332F3.1000808-atKUWr5tajBWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Avi Kivity wrote: > >> The >> congruent case which comes to mind is lazy FPU handling. >> > > That one has preempt_ops in hardware: cr0.ts and #NM. However, that doesn't handle in-kernel use of the fpu. kernel_fpu_begin()/kernel_fpu_end() could easily be modified to take advantage of a generic preempt hook. I'll add a patch for that, and we gain preemptible raid-5 parity calculation. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/