Zhang, Xiantao wrote:
Avi Kivity wrote:
Jes Sorensen wrote:
Ok,
Trying once more. After spending a couple of hours trying to follow
the QEMU dma codeflow, I have convinced myself Avi is right and those
two functions don't need to do the flushing as they all end up
calling dma_bdrv_cb() which calls dma_brdv_unmap(). I have added a
couple comments to the code, which will hopefully save the next
person the 'pleasure' of trying to figure out this too.
It looks right to me. Xiantao?
Fine to me. But seems the change in qemu_iovec_from_buffer is lost in this patch or that change is also not unnecessary ?
I think the fixed unmap handles that case. Can you test to make sure?
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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