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SubjectRe: [PATCH 3/3] virtio-blk: Add bio-based IO path for virtio-blk
On 06/18/2012 03:46 PM, Rusty Russell wrote:
> On Mon, 18 Jun 2012 14:53:10 +0800, Asias He <> wrote:
>> 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.


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