On 05/19/2010 12:01 PM, Stefan Hajnoczi wrote:
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, ...)
I don't follow. What's the implication?
btw I really dislike how the cache attribute (which I see as a pure host
choice) is exposed to the guest. It means we can't change caching mode
on the fly (for example after live migration), or that changing caching
mode during a restart may expose a previously hidden guest bug.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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