Re: [RFC PATCH] vhost-blk: An in-kernel accelerator for virtio-blk

[Liu Yuan]

On 07/28/2011 10:47 PM, Christoph Hellwig wrote:
> On Thu, Jul 28, 2011 at 10:29:05PM +0800, Liu Yuan wrote:
> > From: Liu Yuan<tailai.ly@xxxxxxxxxx>
> >
> > Vhost-blk driver is an in-kernel accelerator, intercepting the
> > IO requests from KVM virtio-capable guests. It is based on the
> > vhost infrastructure.
> >
> > This is supposed to be a module over latest kernel tree, but it
> > needs some symbols from fs/aio.c and fs/eventfd.c to compile with.
> > So currently, after applying the patch, you need to *recomplie*
> > the kernel.
> >
> > Usage:
> > $kernel-src: make M=drivers/vhost
> > $kernel-src: sudo insmod drivers/vhost/vhost_blk.ko
> >
> > After insmod, you'll see /dev/vhost-blk created. done!
> You'll need to send the changes for existing code separately.
Thanks for reminding.

> If you're going mostly for raw blockdevice access just calling
> submit_bio will shave even more overhead off, and simplify the
> code a lot.
Yes, sounds cool, I'll give it a try.

Yuan
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