[lkml]   [2007]   [Feb]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 7/8] lguest: trivial guest block driver
On Mon, 2007-02-12 at 16:01 +0100, Jens Axboe wrote:
> On Mon, Feb 12 2007, Rusty Russell wrote:
> > Thanks Jens!!
> My pleasure, it's not often you get to make that big a performance
> improvement with just a little few lines of change :-)

*cough* I deliberately leave these low hanging fruit in lguest to
encourage people to hack on it. Really. *cough*

> I guess you'll take changes to make this driver queuing as well? It's
> pretty important for good guest io performance as well.

The question is whether the guest or host should queue. If you have
multiple guests sharing a disk in the hose, I would think that the host
is better off queuing. And this would seem to be the common case.

On my todo list is:
1) Implement write barriers, (-> fsync in the host)
2) Make the host userspace program (lguest) async rather than blocking,
3) Allow multiple outstanding requests.

Then it should be useful for other hypervisors.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-02-13 01:31    [W:0.066 / U:2.368 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site