From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: block virtio excessive VIRTIO_PCI_ISR reads Date: Sun, 01 Nov 2009 11:23:49 +0200 Message-ID: <4AED53A5.4050701@redhat.com> References: <41be791c0910280740t7942bb7cj692ba54725bcc5eb@mail.gmail.com> <4AE859BD.106@codemonkey.ws> <4AE85C55.7010806@msgid.tls.msk.ru> <41be791c0910280804n73af36eaydaa11c43f267c9a@mail.gmail.com> <4AE96A0F.2080706@redhat.com> <41be791c0910290847s53cd057bn1d25fb0eba7ff098@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Michael Tokarev , Anthony Liguori , kvm To: Saul Tamari Return-path: Received: from mx1.redhat.com ([209.132.183.28]:23240 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751630AbZKAJYh (ORCPT ); Sun, 1 Nov 2009 04:24:37 -0500 In-Reply-To: <41be791c0910290847s53cd057bn1d25fb0eba7ff098@mail.gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: On 10/29/2009 05:47 PM, Saul Tamari wrote: > Hi, > > The current qemu-kvm from the git indeed adds the MSI-x capability to > the virtio block device. > With MSI-x enabled on the virtio block device, there aren't > VIRTIO_PCI_ISR reads on the unused device. > There shouldn't be VIRTIO_PCI_ISR reads on any device, not just the unused ones, if all are MSI-X capable. -- error compiling committee.c: too many arguments to function