From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-bk0-f50.google.com ([209.85.214.50]:50515 "EHLO mail-bk0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751493Ab3HZILi (ORCPT ); Mon, 26 Aug 2013 04:11:38 -0400 Date: Mon, 26 Aug 2013 10:11:06 +0200 From: Thierry Reding To: Lucas Stach Cc: Jay Agarwal , Stephen Warren , "linux-tegra@vger.kernel.org" , "linux-pci@vger.kernel.org" Subject: Re: Tegra PCIe system hangs Message-ID: <20130826081105.GD31726@ulmo> References: <1377450840.1622.15.camel@tellur> <1377474634.1622.17.camel@tellur> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="T7mxYSe680VjQnyC" In-Reply-To: <1377474634.1622.17.camel@tellur> Sender: linux-pci-owner@vger.kernel.org List-ID: --T7mxYSe680VjQnyC Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Aug 26, 2013 at 01:50:34AM +0200, Lucas Stach wrote: > Ok, turn out this seems to be an issue with legacy PCI interrupts. > Nouveau wasn't really using MSI interrupts, switching them on seems to > fix the stability issue. >=20 > Still I would be interested in the root cause and would like to see this > documented somewhere. Hi Lucas, Thanks for reporting. It's quite possible that there is a general issue with legacy interrupts since I haven't tested that much. I'll see if I can reproduce the lockups when using legacy interrupts on any of my setups. Thanks, Thierry >=20 > Thanks, > Lucas >=20 > Am Sonntag, den 25.08.2013, 19:14 +0200 schrieb Lucas Stach: > > Hi all, > >=20 > > I've been experimenting with the Nouveau driver on Tegra for a few days > > now and made some promising progress. The one thing that keeps throwing > > me back is that I get seemingly random system lockups, which are not > > recoverable. > >=20 > > I think this could be the same issue that was reported by Jay Agarwal > > earlier. (Message-id: > > ) > > I also found a WAR for a system hang issue in the NVidia downstream > > kernel [1], but when tried on upstream it had no effect on the issue. > >=20 > > I'm reasonably sure that this is not driver software related, as I've > > already hunted down most of the caching issues and acceleration seems to > > work at this point. So either this is a random HW hang, or there is some > > software condition I'm not aware of. > >=20 > > I'm running a NV92 connected to the NVidia Beaver board. Kernel is > > next-20130809 with the PCIe series + the LP2 workaround applied. > >=20 > > Could you please investigate if there are any other known errata for the > > Tegra PCIe controller, which could hang the entire system? > >=20 > > Thanks, > > Lucas > >=20 > > [1] > > http://nv-tegra.nvidia.com/gitweb/?p=3Dlinux-2.6.git;a=3Dblobdiff;f=3Da= rch/arm/mach-tegra/pcie.c;h=3D9fab5de016cfd3cd2ebd8176da5bdbedfac73cd8;hp= =3D44749685e2bf822665c9345aec45151b8d2447c4;hb=3Dc5d1bcfb7249b291453a801221= 48155a00e5456a;hpb=3D704125ef90e12bc41de057001cc96d81d7cc0376 > >=20 > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-tegra" = in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html >=20 >=20 --T7mxYSe680VjQnyC Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.21 (GNU/Linux) iQIcBAEBAgAGBQJSGw2ZAAoJEN0jrNd/PrOhrGsP/R04SWYx+tfpM5Khzi2/Bi4s KBaKHPPghskcjkDVMtB74hloPU554/3vQ2qXSQ7Nk9wy2pmJ61p5fW71n7PpjNyc GQNKC7zDt09rMFtqziLxg/aWjy4k89EBWC195sxKODPM2bInZqnFX0moOPwCwRty AU/2p+sGA/g4wE7Y+nJ2EIlWDYuBStWFnnABoZPC9A75JFqHQsZgPd6XM9DntNrR YN6fTdf+Lsmvh4/etpSKriGVkv25zbbaeBazAsM1JaW7mIHLH7Df9XSw7OWn4OiO wa+rcpNnZtRUrAMH2DoZQV8ecDxVJJkVbTLYc8Km/QxbFjhTeDRzFo3YDCAIV2Zq SYpxqR86eoMndJyy1msz+se8hgwwJB6UUVhDLYNPMPdaMFoHe1XssKlw9hfw4hD6 tdsPiE7HyDONg++sabFZt+TwxJITDdTs01dfmBJ7ADHZLGQw8FFCuukIOz67UV7o /PNO3P7p/GDLnrOgJtdtM5rP+pnbFXJpRy7MIwv6hMAPEVKMLtwwH6p+gJhwg7zC D9MGdcZP83f1DpT/y/ZQQvQr5bg4FRyz76VRbdnyAXvkxwb991g65/swSH7S2W1r pL3wTupZBfY3BFdHcHONd4zF0TBqMz62lKu48aSdtUm7o6dm5ghVt7MlRHE+qENK DQyP1I+mzC+CPtDdfGcC =wE0H -----END PGP SIGNATURE----- --T7mxYSe680VjQnyC--