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[Qemu-devel] Re: [PATCH +stable] block: don't attempt to merge overlappi
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From: |
Stefan Hajnoczi |
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Subject: |
[Qemu-devel] Re: [PATCH +stable] block: don't attempt to merge overlapping requests |
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Date: |
Wed, 19 May 2010 10:01:34 +0100 |
On Wed, May 19, 2010 at 9:09 AM, Avi Kivity <address@hidden> 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