From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030979Ab2HIPNy (ORCPT ); Thu, 9 Aug 2012 11:13:54 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:44791 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030816Ab2HIPNw (ORCPT ); Thu, 9 Aug 2012 11:13:52 -0400 Message-ID: <5023D3A1.8040102@redhat.com> Date: Thu, 09 Aug 2012 17:13:37 +0200 From: Paolo Bonzini User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 MIME-Version: 1.0 To: Jason Wang CC: mst@redhat.com, mashirle@us.ibm.com, krkumar2@in.ibm.com, habanero@linux.vnet.ibm.com, rusty@rustcorp.com.au, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, edumazet@google.com, tahm@linux.vnet.ibm.com, jwhan@filewood.snu.ac.kr, davem@davemloft.net, kvm@vger.kernel.org, sri@us.ibm.com Subject: Re: [net-next RFC V5 3/5] virtio: intorduce an API to set affinity for a virtqueue References: <1341484194-8108-1-git-send-email-jasowang@redhat.com> <1341484194-8108-4-git-send-email-jasowang@redhat.com> In-Reply-To: <1341484194-8108-4-git-send-email-jasowang@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Il 05/07/2012 12:29, Jason Wang ha scritto: > Sometimes, virtio device need to configure irq affiniry hint to maximize the > performance. Instead of just exposing the irq of a virtqueue, this patch > introduce an API to set the affinity for a virtqueue. > > The api is best-effort, the affinity hint may not be set as expected due to > platform support, irq sharing or irq type. Currently, only pci method were > implemented and we set the affinity according to: > > - if device uses INTX, we just ignore the request > - if device has per vq vector, we force the affinity hint > - if the virtqueues share MSI, make the affinity OR over all affinities > requested > > Signed-off-by: Jason Wang It looks like both I and Jason will need these patches during the 3.7 merge window, and from different trees (net-next vs. scsi). How do we synchronize? Paolo