Anthony Liguori wrote:
Ryan Harper wrote:
* Henrik Holst <[EMAIL PROTECTED]> [2008-11-18 08:42]:
The bundled qemu in kvm-78 and kvm-79 slows down disk i/o with qcow2
images by an order of 10. If one got 60MB/s before, one gets around
6MB/s with 78 and 79 (measured with dd)
dd command?
what's your -drive parameters look like, specifically, what if type?
ide, scsi, virtio?
This is probably the change to cache=writethrough. I bet if you set
cache=writeback then you'll see this go away.
Would this affect 'qemu-img commit'? It took over an hour to commit
a fresh install of Vista on a qcow2 virtual disk. (The base image
expanded from 3GB to 11GB, which is a lot of committing, though.)
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