From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261877AbTLNNou (ORCPT ); Sun, 14 Dec 2003 08:44:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261890AbTLNNou (ORCPT ); Sun, 14 Dec 2003 08:44:50 -0500 Received: from c-130372d5.012-136-6c756e2.cust.bredbandsbolaget.se ([213.114.3.19]:53410 "EHLO pomac.netswarm.net") by vger.kernel.org with ESMTP id S261877AbTLNNot (ORCPT ); Sun, 14 Dec 2003 08:44:49 -0500 Subject: Re: Fixes for nforce2 hard lockup, apic, io-apic, udma133 covered From: Ian Kumlien To: ross@datscreative.com.au Cc: Jamie Lokier , forming@charter.net, linux-kernel@vger.kernel.org In-Reply-To: <200312142311.10650.ross@datscreative.com.au> References: <200312140407.28580.ross@datscreative.com.au> <20031214042714.GB21241@mail.shareable.org> <200312142124.45966.ross@datscreative.com.au> <200312142311.10650.ross@datscreative.com.au> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-+3U4+7k+vCbcQg9Ak1nt" Message-Id: <1071409484.3309.16.camel@big.pomac.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 Date: Sun, 14 Dec 2003 14:44:44 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --=-+3U4+7k+vCbcQg9Ak1nt Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Resend due to no CC... On Sun, 2003-12-14 at 14:11, Ross Dickson wrote: > I had a lockup on a boot so I am trying a bit more conservative with >=20 > 1000UL and ndelay(400)=20 >=20 > I don't think anyone should try any less than this but hey? >=20 > This gives my system a safety margin of 16 apic counts. > The v1 patch on my system typically gave a safety delay of 13 counts. >=20 > The performance hit with the v2 is still less than with the v1. > With v2 additional delay would only have been present on 2 out of 10 > instead of 10 out of 10 with v1. 13h 18min here now, with 800UL 100ns Works like a charm. It seems like we are just avoiding a timer race with some values... ie more delay might not solve the problem. --=20 Ian Kumlien -- http://pomac.netswarm.net --=-+3U4+7k+vCbcQg9Ak1nt Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (GNU/Linux) iD8DBQA/3GlL7F3Euyc51N8RAhjmAJ9jKI/sZGuuV2kO2xHl97+47fEPAgCghUqL pc7SzZ51guRO0TYKMLnFF5A= =xQtX -----END PGP SIGNATURE----- --=-+3U4+7k+vCbcQg9Ak1nt--