On Wed, Aug 10, 2011 at 12:56:56AM +0800, Peter Zijlstra wrote:
> On Sat, 2011-08-06 at 16:44 +0800, Wu Fengguang wrote:
> >              bdi->dirty_ratelimit = (bw * 3 + ref_bw) / 4;
> 
> I can't actually find this low-pass filter in the code.. could be I'm
> blind from staring at it too long though..

Sorry, it's implemented in another patch (attached). I've also removed
it from _this_ changelog.

Here you can find all the other patches in addition to the core bits.

http://git.kernel.org/?p=linux/kernel/git/wfg/writeback.git;a=shortlog;h=refs/heads/dirty-throttling-v8%2B

Thanks,
Fengguang