Jamie Lokier wrote:
Dor Laor wrote:
Actually this is what happens on mainline qemu with cache=off.
Have I understood right that cache=off on a qcow2 image only uses
O_DIRECT for the leaf image, and the chain of base images don't use
O_DIRECT?
Yeah, that's a bug IMHO and in my patch to add O_DSYNC, I fix that. I
think an argument for O_DIRECT in a leaf and wb in the leaf is seriously
flawed...
Regards,
Anthony Liguori
Sometimes on a memory constrained host, where the (collective) guest
memory is nearly as big as the host memory, I'm not sure this is what
I want.
-- Jamie
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