Re: [PATCH RESEND 0/5] Add vhost-blk support

From: Stefan Hajnoczi
Date: Wed Jul 18 2012 - 07:42:09 EST

On Tue, Jul 17, 2012 at 4:09 PM, Michael S. Tsirkin <mst@xxxxxxxxxx> 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.
> I Cc'd the list of tcm_host in the hope that you can cooperate on this.

Adding it to staging allows more people to try it out, so that's a
good thing. If I get a moment to play with it I'll let you know the

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