From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751816AbbIMIvh (ORCPT ); Sun, 13 Sep 2015 04:51:37 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34612 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751217AbbIMIvf (ORCPT ); Sun, 13 Sep 2015 04:51:35 -0400 Date: Sun, 13 Sep 2015 11:51:29 +0300 From: "Michael S. Tsirkin" To: Jason Wang Cc: Paolo Bonzini , gleb@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, cornelia.huck@de.ibm.com Subject: Re: [PATCH V4 0/4] Fast MMIO eventfd fixes Message-ID: <20150913115106-mutt-send-email-mst@redhat.com> References: <1441941457-23630-1-git-send-email-jasowang@redhat.com> <20150911111453-mutt-send-email-mst@redhat.com> <55F291C4.2010002@redhat.com> <55F29EBD.1090404@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <55F29EBD.1090404@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 11, 2015 at 05:28:29PM +0800, Jason Wang wrote: > > > 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 Wildcard is sufficient I think. -- MST