Hi,
I looked into the IOAT code today as I'm trying to find out how to add support
for it to NFS. I ran into this piece of code, which waits for the DMA
operation to complete:
while (dma_async_memcpy_complete(tp-ucopy.dma_chan,
On 2/5/07, Olaf Kirch [EMAIL PROTECTED] wrote:
Nowhere in the dma_async_*complete functions can I see any code
that would sleep if the DMA is not yet complete. Am I missing something,
or are we really busy-waiting on the DMA engine? Wouldn't this kind of
defeat the purpose of freeing up the CPU
