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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