Re: [PATCH 3/3] virtio-blk: Add bio-based IO path for virtio-blk

On Mon, Jun 18, 2012 at 04:03:23PM +0800, Asias He wrote:

On 06/18/2012 03:46 PM, Rusty Russell wrote:

quoted

On Mon, 18 Jun 2012 14:53:10 +0800, Asias He [off-list ref] wrote:

quoted

This patch introduces bio-based IO path for virtio-blk.

Why make it optional?

request-based IO path is useful for users who do not want to bypass
the IO scheduler in guest kernel, e.g. users using spinning disk.
For users using fast disk device, e.g. SSD device, they can use
bio-based IO path.

OK I guess but then it should be per-device. There could be
a mix of slow and fast disks :)

-- 
Asias