From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755196AbZHTSG0 (ORCPT ); Thu, 20 Aug 2009 14:06:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755165AbZHTSG0 (ORCPT ); Thu, 20 Aug 2009 14:06:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:3108 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755163AbZHTSGZ (ORCPT ); Thu, 20 Aug 2009 14:06:25 -0400 Message-ID: <4A8D90BB.2030506@redhat.com> Date: Thu, 20 Aug 2009 21:06:51 +0300 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.1) Gecko/20090814 Fedora/3.0-2.6.b3.fc11 Thunderbird/3.0b3 MIME-Version: 1.0 To: "Michael S. Tsirkin" CC: Davide Libenzi , gleb@redhat.com, kvm@vger.kernel.org, Linux Kernel Mailing List Subject: Re: [PATCH 0/2] eventfd: new EFD_STATE flag References: <20090820155655.GA8764@redhat.com> <4A8D8A28.2050004@redhat.com> <20090820175540.GA9232@redhat.com> In-Reply-To: <20090820175540.GA9232@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/20/2009 08:55 PM, Michael S. Tsirkin wrote: > >> While we could argue about this my feeling is that we should drop this, >> at least until we can quantify what benefit it has and whether there are >> any Davide-acceptable alternatives. >> >> In the meanwhile, we can let vhost-net support edge-triggered interrupts >> only, let qemu terminate those eventfds and convert then to >> level-triggered interrupts (which it can then inject using the existing >> ioctl). It will keep vhost-net and kvm simpler at the cost of some >> performance penalty to guests using level interrupts. These suck anyway >> so we'll point users at msi. >> > I thought the point was to move assigned devices out of KVM? > Grr. Forgot about that. That's much more important. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.