Avi Kivity wrote:
Anthony Liguori wrote:
If you are using virtio drivers in the guest (which I presume you are
given the reference to /dev/vda), try using the following -drive syntax:
-drive file=/dev/mapper/ioband1,if=virtio,boot=on,cache=off
This will force the use of O_DIRECT. By default, QEMU does not open
with O_DIRECT so you'll see page cache effects.
Good point. But IIRC cache=off is not limited to virtio?
Nope. I just wanted to give the exact syntax to use and it looked like
he was using virtio.
Regards,
Anthony Liguori
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