From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: Re: [PATCH V4 0/4] Fast MMIO eventfd fixes Date: Fri, 11 Sep 2015 17:28:29 +0800 Message-ID: <55F29EBD.1090404@redhat.com> References: <1441941457-23630-1-git-send-email-jasowang@redhat.com> <20150911111453-mutt-send-email-mst@redhat.com> <55F291C4.2010002@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Cc: gleb@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, cornelia.huck@de.ibm.com To: Paolo Bonzini , "Michael S. Tsirkin" Return-path: In-Reply-To: <55F291C4.2010002@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.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