From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Subject: Re: b44: regression in 2.6.22 (resend) Date: Mon, 04 Jun 2007 08:39:48 +0200 Message-ID: <1180939188.4404.5.camel@chaos> References: <20070525172431.60affaca@freepuppy> <200705281944.05030.maxi@daemonizer.de> <1180380230.3657.3.camel@chaos> <200706031826.06891.maxi@daemonizer.de> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: Michael Buesch , linux-kernel , linux-wireless , Stephen Hemminger , Arnaldo Carvalho de Melo , Jeff Garzik , Gary Zambrano , netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Andrew Morton To: Maximilian Engelhardt Return-path: In-Reply-To: <200706031826.06891.maxi-OwNUvPV92VfddJNmlsFzeA@public.gmane.org> Sender: linux-wireless-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org On Sun, 2007-06-03 at 18:26 +0200, Maximilian Engelhardt wrote: > > Is there any other strange behavior of the high res enabled kernel than > > the b44 problem ? > > I didn't notice anything in the past (as I wrote). But today I did some tests > for an updated version of the p54 mac80211 wlan driver and I noticed exactly > the same problem: > > when booting with highres=off everything is fine. > But when I boot an highres enabled kernel and I do the iperf-test with the p54 > driver, my systems becomes unresponsive during the test. It seems to be > exactly the same problem I have with the b44 driver. > So this might not be a bug in the b44 code but a bug somewhere in the linux > networking code. > > I did the test with an 2.6.22-rc3-git4 kernel and the p54 driver built > external as module. Can you look at iperf to figure out, whether it does some weird timer stuff (high frequency interval timer or such) ? Either check the code or strace it. tglx