Re: [PATCH] cfq-iosched: requests "in flight" vs "in driver"clarification

[Jens Axboe]

On Sat, Feb 27 2010, Corrado Zoccolo wrote:
> Counters for requests "in flight" and "in driver" are used asymmetrically
> in cfq_may_dispatch, and have slightly different meaning.
> We split the rq_in_flight counter (was sync_flight) to count both sync
> and async requests, in order to use this one, which is more accurate in
> some corner cases.
> The rq_in_driver counter is coalesced, since individual sync/async counts
> are not used any more.

Thanks, applied.

-- 
Jens Axboe

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