Return-path: Received: from courier.cs.helsinki.fi ([128.214.9.1]:46288 "EHLO mail.cs.helsinki.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751386AbZIUK4q (ORCPT ); Mon, 21 Sep 2009 06:56:46 -0400 Subject: Re: ipw2200: firmware DMA loading rework From: Pekka Enberg To: Bartlomiej Zolnierkiewicz Cc: Mel Gorman , "Luis R. Rodriguez" , Tso Ted , "Aneesh Kumar K.V" , Zhu Yi , Andrew Morton , Johannes Weiner , "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Mel Gorman , "netdev@vger.kernel.org" , "linux-mm@kvack.org" , James Ketrenos , "Chatre, Reinette" , "linux-wireless@vger.kernel.org" , "ipw2100-devel@lists.sourceforge.net" In-Reply-To: <200909211246.34774.bzolnier@gmail.com> References: <200909211159.27344.bzolnier@gmail.com> <20090921100813.GL12726@csn.ul.ie> <200909211246.34774.bzolnier@gmail.com> Date: Mon, 21 Sep 2009 13:56:48 +0300 Message-Id: <1253530608.5216.17.camel@penberg-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Mon, 2009-09-21 at 12:46 +0200, Bartlomiej Zolnierkiewicz wrote: > > > I don't know why people don't see it but for me it has a memory management > > > regression and reliability issue written all over it. > > > > Possibly but drivers that reload their firmware as a response to an > > error condition is relatively new and loading network drivers while the > > system is already up and running a long time does not strike me as > > typical system behaviour. > > Loading drivers after boot is a typical desktop/laptop behavior, please > think about hotplug (the hardware in question is an USB dongle). Yeah, I wonder what broke things. Did the wireless stack change in 2.6.31-rc1 too? IIRC Mel ruled out page allocator changes as a suspect. Pekka