Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 19 Sep 2002 20:11:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 19 Sep 2002 20:11:01 -0400 Received: from holomorphy.com ([66.224.33.161]:4997 "EHLO holomorphy") by vger.kernel.org with ESMTP id ; Thu, 19 Sep 2002 20:11:00 -0400 Date: Thu, 19 Sep 2002 17:10:01 -0700 From: William Lee Irwin III To: linux-kernel@vger.kernel.org Subject: [BUG] x86_udelay_tsc not honoring notsc Message-ID: <20020920001001.GQ28202@holomorphy.com> Mail-Followup-To: William Lee Irwin III , linux-kernel@vger.kernel.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Description: brief message Content-Disposition: inline User-Agent: Mutt/1.3.25i Organization: The Domain of Holomorphy Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2020 Lines: 49 Even though I booted with notsc, rdtsc happens here and appears to generate #GP or some such nonsense: Restoring NMI vector Booting processor 14/52 eip 2000 Initializing CPU#14 masked ExtINT on CPU#14 Leaving ESR disabled. Calibrating delay loop... Program received signal SIGEMT, Emulation trap. __rdtsc_delay (loops=69700) at delay.c:40 40 delay.c: No such file or directory. in delay.c (gdb) bt #0 __rdtsc_delay (loops=69700) at delay.c:40 #1 0xc019f31d in __delay (loops=69700) at delay.c:63 #2 0xc019f384 in __const_udelay (xloops=429400) at delay.c:74 #3 0xc02c1709 in do_boot_cpu (apicid=52) at smpboot.c:865 #4 0xc02c1a4e in smp_boot_cpus (max_cpus=4294967295) at smpboot.c:1095 #5 0xc02c1c70 in smp_prepare_cpus (max_cpus=4294967295) at smpboot.c:1199 #6 0xc01050d7 in init (unused=0x0) at main.c:547 (gdb) p $eip $3 = (void *) 0xc019f2d4 (gdb) disassemble $eip Dump of assembler code for function __rdtsc_delay: 0xc019f2c0 <__rdtsc_delay>: push %ebp 0xc019f2c1 <__rdtsc_delay+1>: mov %esp,%ebp 0xc019f2c3 <__rdtsc_delay+3>: push %ebx 0xc019f2c4 <__rdtsc_delay+4>: mov 0x8(%ebp),%ebx 0xc019f2c7 <__rdtsc_delay+7>: rdtsc 0xc019f2c9 <__rdtsc_delay+9>: mov %eax,%ecx 0xc019f2cb <__rdtsc_delay+11>: nop 0xc019f2cc <__rdtsc_delay+12>: lea 0x0(%esi,1),%esi 0xc019f2d0 <__rdtsc_delay+16>: repz nop 0xc019f2d2 <__rdtsc_delay+18>: rdtsc 0xc019f2d4 <__rdtsc_delay+20>: sub %ecx,%eax 0xc019f2d6 <__rdtsc_delay+22>: cmp %ebx,%eax 0xc019f2d8 <__rdtsc_delay+24>: jb 0xc019f2d0 <__rdtsc_delay+16> 0xc019f2da <__rdtsc_delay+26>: pop %ebx 0xc019f2db <__rdtsc_delay+27>: mov %ebp,%esp 0xc019f2dd <__rdtsc_delay+29>: pop %ebp 0xc019f2de <__rdtsc_delay+30>: ret End of assembler dump. - 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/