linux-kernel - Re: bdi_threshold slow to reach steady state

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Date:	Thu, 15 Oct 2009 10:22:34 +0100
From:	Richard Kennedy <richard@....demon.co.uk>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Wu Fengguang <fengguang.wu@...el.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Martin Bligh <mbligh@...gle.com>
Subject: Re: bdi_threshold slow to reach steady state

On Wed, 2009-10-14 at 16:04 +0200, Peter Zijlstra wrote:
> On Wed, 2009-10-14 at 14:55 +0100, Richard Kennedy wrote:
> > 
> > commit 11735a2336ba08cf21aebf79a706c86aca5e44b2
> > Author: Richard Kennedy <richard@....demon.co.uk>
> > Date:   Wed Oct 14 14:46:21 2009 +0100
> > 
> >     mm: speed up per bdi dirty threshold calculations
> 
> I think the subject is confusing, we don't actually compute things
> faster in the less cycles sense.
> 
> We reduce the dampening for the control system, yielding faster
> convergence.
Ah yes, sorry about that. That was a bit of a placeholder.

I'll write a proper change log & re-post.
regards
Richard 

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