On 12/18/2014 11:46 AM, Shaohua Li wrote:
This is the blk-mq part to support tag allocation policy. The default allocation policy isn't changed (though it's not a strict FIFO). The new policy is round-robin for libata. But it's a try-best implementation. If multiple tasks are competing, the tags returned will be mixed (which is unavoidable even with !mq, as requests from different tasks can be mixed in queue)
Can we get rid of the atomic_read() on non-rr? It's never set outside of initialization there.
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