[PATCH v2 RESENT] blk: optimization for classic polling

[Jens Axboe]

On 2/13/18 11:56 AM, Nitesh Shetty wrote:
> This removes the dependency on interrupts to wake up task. Set task
> state as TASK_RUNNING, if need_resched() returns true,
> while polling for IO completion.
> Earlier, polling task used to sleep, relying on interrupt to wake it up.
> This made some IO take very long when interrupt-coalescing is enabled in
> NVMe.

__set_current_state() should suffice here.

-- 
Jens Axboe