Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756139AbaFQPxg (ORCPT ); Tue, 17 Jun 2014 11:53:36 -0400 Received: from mx1.redhat.com ([209.132.183.28]:19898 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755401AbaFQPxe (ORCPT ); Tue, 17 Jun 2014 11:53:34 -0400 Message-ID: <53A06475.7000308@redhat.com> Date: Tue, 17 Jun 2014 17:53:25 +0200 From: Paolo Bonzini User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: Ming Lei , Stefan Hajnoczi CC: Jens Axboe , linux-kernel , "Michael S. Tsirkin" , linux-api@vger.kernel.org, Linux Virtualization , Stefan Hajnoczi Subject: Re: [RFC PATCH 2/2] block: virtio-blk: support multi virt queues per virtio-blk device References: <1402680562-8328-1-git-send-email-ming.lei@canonical.com> <1402680562-8328-3-git-send-email-ming.lei@canonical.com> In-Reply-To: X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Il 17/06/2014 17:50, Ming Lei ha scritto: >> > It would be nice to allocate virtqueues dynamically instead of >> > hardcoding the limit. virtio-scsi also allocates virtqueues >> > dynamically. > virtio-scsi may have lots of LUN, but virtio-blk only has one disk > which needn't lots of hardware queues. If you want to do queue steering based on the guest VCPU number, the number of queues must be = to the number of VCPUs shouldn't it? I tried using a divisor of the number of VCPUs, but couldn't get the block layer to deliver interrupts to the right VCPU. Paolo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/