Re: [PATCHv6 00/15] kill unnecessary bdi wakeups + cleanups

From: Jens Axboe
Date: Tue Aug 03 2010 - 08:27:14 EST

On 2010-07-25 13:29, Artem Bityutskiy wrote:
> Hi,
> here is v6 of the patch series which clean-ups bdi threads and substantially
> lessens amount of unnecessary kernel wake-ups, which is very important on
> battery-powered devices.
> This patch-set is also available at:
> git:// flushers_v6

Thanks Artem, for sticking around long enough to get this into
shape. I have finally merged it.

> 1. Use 'spin_lock_bh' for the 'bdi->wb_lock' (changed patch N12)

I'd rather not, question is how to avoid it. Either just wakeup the
default thread, or punt the lock-and-check bdi->wb.task to a thread.

Jens Axboe

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