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

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Date:	Fri, 20 Jul 2012 22:30:35 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Asias He <asias@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Benjamin LaHaise <bcrl@...ck.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Jeff Moyer <jmoyer@...hat.com>, kvm@...r.kernel.org,
	linux-aio@...ck.org, linux-fsdevel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	gregkh@...uxfoundation.org
Subject: Re: [PATCH RESEND 0/5] Add vhost-blk support

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.
> 
> Asias He (5):
>   aio: Export symbols and struct kiocb_batch for in kernel aio usage
>   eventfd: Export symbol eventfd_file_create()
>   vhost: Make vhost a separate module
>   vhost-net: Use VHOST_NET_FEATURES for vhost-net
>   vhost-blk: Add vhost-blk support


OK so given the state it's in, and assuming you think it is helpful
to let it mature in tree and not out of tree, I think it's
reasonable to try to do it like tcm_vhost is going to do it:
- send me changes to vhost core ASAP (and keep it minimal, e.g.
  use your own header file to export to userspace)
- for other stuff - put in drivers/staging, and ask Greg to merge

-- 
MST
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