Re: [PATCHv2 11/11] writeback: prevent unnecessary bdi threadswakeups

[Artem Bityutskiy]

On Thu, 2010-07-22 at 18:05 +1000, Nick Piggin wrote:
> This is producing 2 unrequired context switches, so I really would
> like to see it done properly. Setting up a timer is really pretty
> simple (or if you would care to implement a delayed process wakeup
> API, I think that would be useful -- I'm surprised there isn't one
> already).

It reduces flusher thread wake-up count a lot, BTW. I've just sent v4 of
the patch set which implements this, see patch 12.

Nick, could you please take a look at patch 10 in that v4 series. I've
added memory barriers, they are always tricky, and last time I remember
you helped me to use barriers properly.

Thanks!

-- 
Best Regards,
Artem Bityutskiy (ÐÑÑÑÐ ÐÐÑÑÑÐÐÐ)

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