From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1752041Ab2GRCI3 (ORCPT <rfc822;w@1wt.eu>);
	Tue, 17 Jul 2012 22:08:29 -0400
Received: from mx1.redhat.com ([209.132.183.28]:4760 "EHLO mx1.redhat.com"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1750989Ab2GRCIY (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Tue, 17 Jul 2012 22:08:24 -0400
Message-ID: <50061AD3.6030704@redhat.com>
Date: Wed, 18 Jul 2012 10:09:23 +0800
From: Asias He <asias@redhat.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1
MIME-Version: 1.0
To: "Michael S. Tsirkin" <mst@redhat.com>
CC: linux-kernel@vger.kernel.org, Alexander Viro <viro@zeniv.linux.org.uk>,
        Benjamin LaHaise <bcrl@kvack.org>,
        James Bottomley <James.Bottomley@HansenPartnership.com>,
        Jeff Moyer <jmoyer@redhat.com>, kvm@vger.kernel.org,
        linux-aio@kvack.org, linux-fsdevel@vger.kernel.org,
        target-devel <target-devel@vger.kernel.org>,
        linux-scsi <linux-scsi@vger.kernel.org>,
        lf-virt <virtualization@lists.linux-foundation.org>,
        Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
        Zhi Yong Wu <wuzhy@cn.ibm.com>,
        Anthony Liguori <aliguori@linux.vnet.ibm.com>,
        Paolo Bonzini <pbonzini@redhat.com>, Christoph Hellwig <hch@lst.de>,
        Jens Axboe <axboe@kernel.dk>, Hannes Reinecke <hare@suse.de>
Subject: Re: [PATCH RESEND 0/5] Add vhost-blk support
References: <1342169711-12386-1-git-send-email-asias@redhat.com> <20120717150928.GB11587@redhat.com>
In-Reply-To: <20120717150928.GB11587@redhat.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On 07/17/2012 11:09 PM, Michael S. Tsirkin wrote:
> On Fri, Jul 13, 2012 at 04:55:06PM +0800, Asias He wrote:
>>
>> Hi folks,
>>
>> [I am resending to fix the broken thread in the previous one.]
>>
>> This patchset adds vhost-blk support. vhost-blk is a in kernel virito-blk
>> device accelerator. Compared to userspace virtio-blk implementation, vhost-blk
>> gives about 5% to 15% performance improvement.
>
> Same thing as tcm_host comment:
>
> 	It seems not 100% clear whether this driver will have major
> 	userspace using it. And if not, it would be very hard to support a
> 	driver when recent userspace does not use it in the end.
>
> 	I think a good idea for 3.6 would be to make it depend on
> 	CONFIG_STAGING.  Then we don't commit to an ABI.  For this, you can add
> 	a separate Kconfig and source it from drivers/staging/Kconfig.  Maybe it
> 	needs to be in a separate directory drivers/vhost/staging/Kconfig.

OK.

> I Cc'd the list of tcm_host in the hope that you can cooperate on this.

Sure.

-- 
Asias