Re: [Xen-devel] poor domU VBD performance.

[Jens Axboe <axboe@xxxxxxx>]

On Thu, Mar 31 2005, Keir Fraser wrote:
> 
> On 31 Mar 2005, at 19:04, Jens Axboe wrote:
> 
> >I cannot immediately see if you call bdev_put() right after queueing 
> >the
> >io? If so, I think the patch looks fine. If not, you are missing the
> >last unplug :-)
> 
> That's not the job of bdev_put(): the final unplug is done at the end 
> of blkio_schedule -- the same place that I do a run_task_queue() when 
> compling for Linux 2.4.

Thanks for confirming, that sounds fine.

-- 
Jens Axboe


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