From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maximilian Engelhardt Subject: Re: b44: regression in 2.6.22 (resend) Date: Tue, 29 May 2007 20:28:19 +0200 Message-ID: <200705292028.23386.maxi@daemonizer.de> References: <20070525172431.60affaca@freepuppy> <200705282255.56490.maxi@daemonizer.de> <1180388752.3657.13.camel@chaos> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2108277.LgnDDiMWG5"; protocol="application/pgp-signature"; micalg=pgp-sha1 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: Thomas Gleixner Return-path: In-Reply-To: <1180388752.3657.13.camel@chaos> Sender: linux-wireless-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org --nextPart2108277.LgnDDiMWG5 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Monday 28 May 2007, Thomas Gleixner wrote: > On Mon, 2007-05-28 at 22:55 +0200, Maximilian Engelhardt wrote: > > > > I additionally built my 2.6.22-rc2-mm1 kernel without High Resoluti= on > > > > Timer, but the high ping problem is still there. > > > > > > Hmm, that's mysterious. Wild guess is that highres exposes the hidden > > > "feature" in a different way than rc2-mm1 does. > > > > I think the bug in 2.6.21/22-rc3 is a different one that the one in > > 2.6.22-rc2-mm1, but that's also only a wild guess :) > > > > I'll explain this a bit: > > In 2.6.21/22-rc3 is the same b44 driver that has been in the stock > > kernels for some time. With this driver and High Resolution Timer turned > > on I get problems using iperf. The problems are that the systems becomes > > really slow and unresponsive. Michael Buesch thought this could be an > > IRQ storm which sounds logical to me. This bug did never happen to me > > before I startet the iperf test. > > Can you please apply > > http://www.tglx.de/projects/hrtimers/2.6.22-rc3/patch-2.6.22-rc3-hrt1.pat= ch > > on top of rc3 and check, whether it has any effect on your problem. > The patch didn't change anything. > > The other issue happens only with 2.6.22-rc2-mm1 which includes the b44 > > ssb spilt. It's independed wether High Resolution Timer is turned on or > > off I always get very varying and high ping times. The iperf-test doesn= 't > > show the problems from 2.6.21/22-rc3. > > Neither with nor without highres ? Yes, it doesn't matter if highres is turned on or off. iperf never showed t= he=20 problem from 2.6.21/22-rc3. Maxi --nextPart2108277.LgnDDiMWG5 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQBGXHDHOimwv528XGERAvpZAKDu3pqAnjMzHV5odcOiR2TmhWn8bQCg2hQ/ 2ZkoY2na1eNflA4m/XLM1AA= =hbMa -----END PGP SIGNATURE----- --nextPart2108277.LgnDDiMWG5--