From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762113AbYFDMPP (ORCPT ); Wed, 4 Jun 2008 08:15:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760842AbYFDMKs (ORCPT ); Wed, 4 Jun 2008 08:10:48 -0400 Received: from smtpout01s1.x-echo.com ([193.252.149.37]:35252 "EHLO smtpout01s1.x-echo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760363AbYFDMKo (ORCPT ); Wed, 4 Jun 2008 08:10:44 -0400 X-Greylist: delayed 457 seconds by postgrey-1.27 at vger.kernel.org; Wed, 04 Jun 2008 08:10:43 EDT From: Lkm To: linux-kernel@vger.kernel.org Subject: PROBLEM: Hardware clock instable Date: Wed, 4 Jun 2008 14:02:39 +0200 User-Agent: KMail/1.9.9 MIME-Version: 1.0 Content-Type: Multipart/Mixed; boundary="Boundary-00=_fRoRIl3n7W0Dhk0" Message-Id: <200806041402.39515.lkm@lea-linux.com> X-AV-Checked: ClamAV using ClamSMTP Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Boundary-00=_fRoRIl3n7W0Dhk0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Hello all, i work in a web hosting compagny. We have a strange problem on many servers. The hardware clock of several server is totaly instable. This happen on many server, not all. Symptoms: root@computer:~# date && hwclock Wed Jun 4 13:53:21 CEST 2008 Sat Jun 7 20:23:16 2008 -0.576925 seconds root@computer:~# hwclock --systohc root@computer:~# date && hwclock Wed Jun 4 13:53:34 CEST 2008 Wed Jun 4 13:53:36 2008 -0.835749 seconds (2 seconds !) root@rd10:~# date && hwclock Wed Jun 4 13:53:42 CEST 2008 Wed Jun 4 13:54:02 2008 -0.779573 seconds (20 seconds !!) I have try to pass clock or clocksource= hpet, pti to the kernel at boot: same troubles. Kernel information: cat /proc/version Linux version 2.6.24.2 (root@XXXXXXX ) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP Wed Feb 20 15:40:12 CET 2008 cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 8 model name : Pentium III (Coppermine) stepping : 6 cpu MHz : 797.548 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse bogomips : 1596.12 clflush size : 32 processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 8 model name : Pentium III (Coppermine) stepping : 6 cpu MHz : 797.548 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse bogomips : 1595.08 clflush size : 32 cat /proc/ioports 0000-001f : dma1 0020-0021 : pic1 0040-0043 : timer0 0050-0053 : timer1 0060-006f : keyboard 0070-0077 : rtc 0080-008f : dma page reg 00a0-00a1 : pic2 00c0-00df : dma2 00f0-00ff : fpu 0170-0177 : 0000:00:0f.1 01f0-01f7 : 0000:00:0f.1 01f0-01f7 : ide0 0220-0223 : ACPI PM1a_EVT_BLK 0230-0231 : ACPI PM1a_CNT_BLK 0240-0243 : ACPI PM_TMR 02f8-02ff : serial 0376-0376 : 0000:00:0f.1 03c0-03df : vga+ 03f2-03f5 : floppy 03f6-03f6 : 0000:00:0f.1 03f6-03f6 : ide0 03f7-03f7 : floppy DIR 03f8-03ff : serial 0408-040f : pnp 00:01 0cf8-0cff : PCI conf1 0f50-0f58 : pnp 00:01 1800-18ff : 0000:00:04.0 2000-20ff : 0000:00:01.0 2000-20ff : cpqarray 2400-243f : 0000:00:02.0 2400-243f : e100 2800-28ff : 0000:00:03.0 2c00-2c0f : 0000:00:0f.1 cat /proc/iomem 00000000-0009f7ff : System RAM 0009f800-0009ffff : reserved 000a0000-000bffff : Video RAM area 000c0000-000c7fff : Video ROM 000e8000-000edfff : Adapter ROM 000f0000-000fffff : System ROM 00100000-1fffbfff : System RAM 00200000-005c7a77 : Kernel code 005c7a78-00717f7b : Kernel data 0075e000-007cfbc7 : Kernel bss 1fffc000-1fffffff : ACPI Tables 30000000-300fffff : 0000:00:02.0 30100000-3017ffff : 0000:00:01.0 30180000-3019ffff : 0000:00:03.0 c3000000-c3ffffff : 0000:00:03.0 c4dfef00-c4dfefff : 0000:00:04.0 c4dff000-c4dfffff : 0000:00:03.0 c4e00000-c4efffff : 0000:00:02.0 c4e00000-c4efffff : e100 c4fff000-c4ffffff : 0000:00:02.0 c4fff000-c4ffffff : e100 c5000000-c5ffffff : 0000:00:01.0 c6000000-c6ffffff : 0000:00:01.0 fec00000-fec0ffff : reserved fee00000-fee0ffff : reserved fff80000-ffffffff : reserved lspci -vvvv 00:00.0 Host bridge: Broadcom CNB20LE Host Bridge (rev 06) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR- TAbort- SERR-