Return-path: Received: from static-ip-62-75-166-246.inaddr.intergenia.de ([62.75.166.246]:43451 "EHLO vs166246.vserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750746AbXE1Poi (ORCPT ); Mon, 28 May 2007 11:44:38 -0400 From: Michael Buesch To: Thomas Gleixner , Stephen Hemminger Subject: Re: b44: regression in 2.6.22 (resend) Date: Mon, 28 May 2007 17:43:31 +0200 Cc: Maximilian Engelhardt , linux-kernel , linux-wireless , Arnaldo Carvalho de Melo , Jeff Garzik , Gary Zambrano , netdev@vger.kernel.org, Andrew Morton References: <20070525172431.60affaca@freepuppy> <200705281714.25841.mb@bu3sch.de> <1180366371.4952.5.camel@chaos> In-Reply-To: <1180366371.4952.5.camel@chaos> MIME-Version: 1.0 Message-Id: <200705281743.32134.mb@bu3sch.de> Content-Type: text/plain; charset="iso-8859-15" Sender: linux-wireless-owner@vger.kernel.org List-ID: On Monday 28 May 2007 17:32:51 Thomas Gleixner wrote: > On Mon, 2007-05-28 at 17:14 +0200, Michael Buesch wrote: > > > The -oldconfig1 is the kernel that had no problems and the other shows the b44 > > > problem. So if High Resolution Timer Support is disabled everything works > > > fine and if I enable it the problems do appear again. > > > > > > I didn't test this on my 2.6.22-rc3 kernel yet, but I guess disabling High > > > Resolution Timer Support will also solve the problem there. > > > > > > The older kernels I tried also work perfectly fine and they didn't have the > > > High Resolution Timer Support yet. > > > > So, that's interesting, indeed. > > Any idea what's going on, someone? Thomas? > > Not off the top of my head. > > Maximilian, does the kernel work otherwise (I mean aside of the b44 > driver) ? > > Can you please keep CONFIG_HIGH_RES_TIMERS and CONFIG_NOHZ and try the > following combinations on the kernel command line: > > 1) highres=off nohz=off (should be the same as your working config) > 2) highres=off > 3) nohz=off > > Michael, is anything in the b44 driver timer driven ? NAPI perhaps. I don't know. Steve may know. The only timer in b44 is to update stats every second. I doubt that this can cause such an issue. It's not involved in transmission. -- Greetings Michael.