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    SubjectRe: [RFC PATCH] vhost-blk: An in-kernel accelerator for virtio-blk
    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<>
    >> 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.


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