Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 15 Jan 2003 11:08:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 15 Jan 2003 11:08:04 -0500 Received: from k100-145.bas1.dbn.dublin.eircom.net ([159.134.100.145]:16392 "EHLO corvil.com.") by vger.kernel.org with ESMTP id ; Wed, 15 Jan 2003 11:08:03 -0500 Message-ID: <3E2588C6.4020906@Linux.ie> Date: Wed, 15 Jan 2003 16:13:58 +0000 From: Padraig@Linux.ie User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2) Gecko/20021203 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Miklos.Szeredi@eth.ericsson.se CC: Larry.Sendlosky@storigen.com, davej@codemonkey.org.uk, linux-kernel@vger.kernel.org Subject: Re: VIA C3 and random SIGTRAP or segfault References: <7BFCE5F1EF28D64198522688F5449D5AC63352@xchangeserver2.storigen.com> <3E257488.3000006@Linux.ie> <200301151556.h0FFupx12324@duna48.eth.ericsson.se> In-Reply-To: <200301151556.h0FFupx12324@duna48.eth.ericsson.se> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Miklos.Szeredi@eth.ericsson.se wrote: >>segfault is what I saw. Something seems to be corrupted (by a cmov >>SIGILL?) and from then the app will crash in the same >>(arbitrary) place until the machine is restarted. Some apps >>are more susceptible than others. Note a Samuel II would work fine? > > Do you mean that after a cmov is encountered other applications will > also randomly crash? That would explain what I've been seeing. Well I never got SIGILL as would be expected. I got SEGFAULTs and I'm only speculating that a CMOV was encountered. But yes that does seem to be what's happening, the CMOV corrupts something global to many apps, and "every now and then" SEGFAULT. You could quickly check your system with something like: find /bin -perm +111 -type f | while read bin; do objdump --disassemble $bin 2>/dev/null | grep -q cmov && echo "$bin has cmov" done P?draig. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/