Re: [PATCH +stable] block: don't attempt to merge overlapping requests

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On Wed, May 19, 2010 at 9:09 AM, Avi Kivity <avi@xxxxxxxxxx> wrote:
> On 05/18/2010 10:22 PM, Stefan Hajnoczi wrote:
>> What cache= mode are you running?
>
> writeback.

In the cache=writeback case the virtio-blk guest driver does:

blk_queue_ordered(q, QUEUE_ORDERED_DRAIN_FLUSH, ...)

Stefan
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