From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933024AbXCKEPf (ORCPT ); Sat, 10 Mar 2007 23:15:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933052AbXCKEPf (ORCPT ); Sat, 10 Mar 2007 23:15:35 -0500 Received: from waste.org ([66.93.16.53]:43894 "EHLO waste.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933024AbXCKEPe (ORCPT ); Sat, 10 Mar 2007 23:15:34 -0500 Date: Sat, 10 Mar 2007 22:03:05 -0600 From: Matt Mackall To: Con Kolivas Cc: linux-kernel , Andrew Morton , ck@vds.kolivas.org Subject: Re: RSDL-mm 0.28 Message-ID: <20070311040305.GT10394@waste.org> References: <20070311013506.GD10459@waste.org> <8cd998d50703101828l71fbec7bi9a819ad7b7fd9828@mail.gmail.com> <20070311040132.GS10394@waste.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070311040132.GS10394@waste.org> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Mar 10, 2007 at 10:01:32PM -0600, Matt Mackall wrote: > On Sun, Mar 11, 2007 at 01:28:22PM +1100, Con Kolivas wrote: > > Ok I don't think there's any actual accounting problem here per se > > (although I did just recently post a bugfix for rsdl however I think > > that's unrelated). What I think is going on in the ccache testcase is > > that all the work is being offloaded to kernel threads reading/writing > > to/from the filesystem and the make is not getting any actual cpu > > time. > > I don't see significant system time while this is happening. Also, it's running pretty much entirely out of page cache so there wouldn't be a whole lot for kernel threads to do. -- Mathematics is the supreme nostalgia of our time.