Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762566AbZJOJXW (ORCPT ); Thu, 15 Oct 2009 05:23:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762555AbZJOJXU (ORCPT ); Thu, 15 Oct 2009 05:23:20 -0400 Received: from anchor-post-2.mail.demon.net ([195.173.77.133]:44730 "EHLO anchor-post-2.mail.demon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762542AbZJOJXT (ORCPT ); Thu, 15 Oct 2009 05:23:19 -0400 Subject: Re: bdi_threshold slow to reach steady state From: Richard Kennedy To: Peter Zijlstra Cc: Wu Fengguang , lkml , Martin Bligh In-Reply-To: <1255529072.8392.436.camel@twins> References: <1255518586.2360.78.camel@castor> <1255520272.8392.429.camel@twins> <1255528520.2360.94.camel@castor> <1255529072.8392.436.camel@twins> Content-Type: text/plain Date: Thu, 15 Oct 2009 10:22:34 +0100 Message-Id: <1255598554.2304.1.camel@castor> Mime-Version: 1.0 X-Mailer: Evolution 2.26.3 (2.26.3-1.fc11) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 890 Lines: 25 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 > > 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/