From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from cthulhu.engr.sgi.com (cthulhu.engr.sgi.com [192.26.80.2]) by neteng.engr.sgi.com (980427.SGI.8.8.8/970903.SGI.AUTOCF) via ESMTP id PAA70851 for ; Mon, 13 Jul 1998 15:40:21 -0700 (PDT) Return-Path: Received: (from majordomo-owner@localhost) by cthulhu.engr.sgi.com (980427.SGI.8.8.8/970903.SGI.AUTOCF) id PAA23058 for linux-list; Mon, 13 Jul 1998 15:38:46 -0700 (PDT) mail_from (owner-linux@relay.engr.sgi.com) Received: from sgi.sgi.com (sgi.engr.sgi.com [192.26.80.37]) by cthulhu.engr.sgi.com (980427.SGI.8.8.8/970903.SGI.AUTOCF) via ESMTP id PAA47087 for ; Mon, 13 Jul 1998 15:38:41 -0700 (PDT) mail_from (sgi.sgi.com!rachael.franken.de!hub-fue!alpha.franken.de!tsbogend) Received: from rachael.franken.de (rachael.franken.de [193.175.24.38]) by sgi.sgi.com (980309.SGI.8.8.8-aspam-6.2/980304.SGI-aspam: SGI does not authorize the use of its proprietary systems or networks for unsolicited or bulk email from the Internet.) via ESMTP id PAA05956 for ; Mon, 13 Jul 1998 15:38:34 -0700 (PDT) mail_from (rachael.franken.de!hub-fue!alpha.franken.de!tsbogend) Received: from hub-fue by rachael.franken.de via rmail with uucp id for cthulhu.engr.sgi.com!linux; Tue, 14 Jul 1998 00:38:18 +0200 (MET DST) (Smail-3.2 1996-Jul-4 #4 built DST-Sep-8) Received: by hub-fue.franken.de (Smail3.1.29.1 #35) id m0yvrEW-002OzrC; Tue, 14 Jul 98 00:38 MET DST Received: (from tsbogend@localhost) by alpha.franken.de (8.8.7/8.8.5) id AAA02784; Tue, 14 Jul 1998 00:08:26 +0200 Message-ID: <19980714000825.24064@alpha.franken.de> Date: Tue, 14 Jul 1998 00:08:25 +0200 From: Thomas Bogendoerfer To: ralf@uni-koblenz.de Cc: linux-mips@fnet.fr, linux@cthulhu.engr.sgi.com Subject: Re: One good and some bad news References: <19980712112949.25350@alpha.franken.de> <19980712190135.R10756@uni-koblenz.de> <19980712235319.65470@alpha.franken.de> <19980713023606.U10756@uni-koblenz.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.85 In-Reply-To: <19980713023606.U10756@uni-koblenz.de>; from ralf@uni-koblenz.de on Mon, Jul 13, 1998 at 02:36:06AM +0200 Sender: owner-linux@cthulhu.engr.sgi.com Precedence: bulk On Mon, Jul 13, 1998 at 02:36:06AM +0200, ralf@uni-koblenz.de wrote: > On Sun, Jul 12, 1998 at 11:53:19PM +0200, Thomas Bogendoerfer wrote: > > good to know, as the address was really bogus. Is there a chance to > > print out the faulting physical address for a bus error ? This would > > give us some chances to find the real culprit. But it still hasn't happen > > again. > > Basically what to do would be to modify the kernel such that it will work > with caches disabled. Then you get (almost) precise exceptions again. > Alternative and with less impact on the performance you could try to > writeback the caches in strategic positions for debugging. That makes a > kind of a barrier for DBE exceptions. ugly. I hope, that I won't need it. > You patch looks good, could you commit it? Thanks. I do, when I've merged my stuff with the latest CVS commits. Thomas -- See, you not only have to be a good coder to create a system like Linux, you have to be a sneaky bastard too ;-) [Linus Torvalds in <4rikft$7g5@linux.cs.Helsinki.FI>]