[lkml]   [2012]   [Jul]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH V4 3/3] virtio-blk: Add bio-based IO path for virtio-blk
On Mon, Jul 30, 2012 at 11:25:51AM +0930, Rusty Russell wrote:
> I consider this approach a half-way step. Quick attempts on my laptop
> and I couldn't find a case where the bio path was a loss, but in theory
> if the host wasn't doing any reordering and it was a slow device, you'd
> want the guest to do so.
> I'm not sure if current qemu can be configured to do such a thing?

The host kernel will do the I/O scheduling for you unless you explicitly
disable it. And we should be able to assume an administrator will only
disable it when they have a reason for it - if not they'll get worse
performance for non-virtualized workloads as well.

 \ /
  Last update: 2012-07-30 16:21    [W:0.040 / U:0.588 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site