From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752470AbbIKJ2f (ORCPT ); Fri, 11 Sep 2015 05:28:35 -0400 Received: from mx1.redhat.com ([209.132.183.28]:42494 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751464AbbIKJ2d (ORCPT ); Fri, 11 Sep 2015 05:28:33 -0400 Subject: Re: [PATCH V4 0/4] Fast MMIO eventfd fixes To: Paolo Bonzini , "Michael S. Tsirkin" References: <1441941457-23630-1-git-send-email-jasowang@redhat.com> <20150911111453-mutt-send-email-mst@redhat.com> <55F291C4.2010002@redhat.com> Cc: gleb@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, cornelia.huck@de.ibm.com From: Jason Wang Message-ID: <55F29EBD.1090404@redhat.com> Date: Fri, 11 Sep 2015 17:28:29 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <55F291C4.2010002@redhat.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/11/2015 04:33 PM, Paolo Bonzini wrote: > > On 11/09/2015 10:15, Michael S. Tsirkin wrote: >> I think we should add a capability for fast mmio. >> This way, userspace can avoid crashing buggy kernels. > I agree. > > Paolo Right, then qemu will use datamatch eventfd if kenrel dost not have the capability. Thanks