Return-path: Received: from mail.anarazel.de ([217.115.131.40]:47413 "EHLO smtp.anarazel.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751954AbYI2IfE (ORCPT ); Mon, 29 Sep 2008 04:35:04 -0400 From: Andres Freund To: Johannes Berg Subject: Re: bad DMAR interaction with iwlagn and SATA Date: Mon, 29 Sep 2008 10:26:15 +0200 Cc: linux-kernel@vger.kernel.org, "linux-wireless" , Tomas Winkler References: <200809251511.20132.andres@anarazel.de> <1222441833.3798.10.camel@johannes.berg> In-Reply-To: <1222441833.3798.10.camel@johannes.berg> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1671546.fHiBhP5sPO"; protocol="application/pgp-signature"; micalg=pgp-sha1 Message-Id: <200809291026.16394.andres@anarazel.de> (sfid-20080929_103509_921270_8FE20C17) Sender: linux-wireless-owner@vger.kernel.org List-ID: --nextPart1671546.fHiBhP5sPO Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Hi, On Friday 26 September 2008, you wrote in "Re: bad DMAR interaction with=20 iwlagn and SATA": > > [ 4184.617392] DMAR:[DMA Read] Request device [03:00.0] fault addr > > fa946000 [ 4184.617393] DMAR:[fault reason 06] PTE Read access is not s= et > > [ 4184.644081] iwlagn: Microcode HW error detected. Restarting. [ > > 4186.646000] psmouse.c: TouchPad at isa0060/serio1/input0 lost > > synchronization, throwing 1 bytes away. [ 4186.683034] Registered led > > device: iwl-phy0:radio > > [ 4186.683478] Registered led device: iwl-phy0:assoc > > [ 4186.683793] Registered led device: iwl-phy0:RX > > [ 4186.684094] Registered led device: iwl-phy0:TX > > [ 4186.689749] wlan0: authenticate with AP 00:1d:7e:42:fe:42 > > [ 4186.691691] wlan0: authenticated > > [ 4186.691705] wlan0: associate with AP 00:1d:7e:42:fe:42 > > [ 4186.696380] wlan0: RX ReassocResp from 00:1d:7e:42:fe:42 (capab=3D0x= 411 > > status=3D0 aid=3D2) [ 4186.696392] wlan0: associated > > Most of the time when this happened, the machine wasnt reacting for 1-3 > > seconds and had audio buffer underruns, but I also had a hard lockup > > which I couldnt diagnose so far. > I suspect the hard lockup was due to a BUG_ON in the iwlagn driver, if > you can reproduce this either try applying the patch here [1] or going > to a VC to see if it crashes there. It's a BUG_ON in iwl-tx.c. Could not reproduce so far - it is rather hard working on the machine with= =20 DMAR enabled because I get 1-5s lockups all the time like described above... Andres --nextPart1671546.fHiBhP5sPO Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAkjgkSgACgkQporPraT14ii4cACfQBehnutTOVuJiZ2XqKgldTrH fwMAnitB5D7h0bnzHmoqlCAFY2iU3ixp =Xg1+ -----END PGP SIGNATURE----- --nextPart1671546.fHiBhP5sPO--