Description of problem: On system ibm-alishan.rhts.boston.redhat.com while running the RHTS testsuite /kernel/misc/autotest results in the following error: BUG: time warp detected! prev > now, 1053bb44a957f108 > 1053bb44676070e6: = 1106739234 delta, on CPU#0 Version-Release number of selected component (if applicable): 2.6.20-14.el5rt How reproducible: 50% of the time Steps to Reproduce: Here is a link to the kernel http://porkchop.redhat.com/brewroot/packages/kernel-rt/2.6.20/14.el5rt/ Here is information on how to setup a local system to use the RHTS devel environment. You can down load the tests from here: http://rhts.lab.boston.redhat.com/rpms/development/noarch/noarch/rh-tests-kernel-misc-autotest-1.0-8.noarch.rpm This test it written for the RHTS environment. So you can install the RHTS devel package following the directions from here: http://intranet.corp.redhat.com/ic/intranet/RHTSMainPage.html then install the test and do a make run. Or if you do _not_ want to install the RHTS devel stuff comment out the following: Makefile # Include a global make rules file include /usr/share/rhts/lib/rhts-make.include runtest.sh # Source the common test script helpers . /usr/bin/rhts_environment.sh then do a make run. Actual results: <Apr/13 02:44 pm>BUG: time warp detected! <Apr/13 02:44 pm>prev > now, 1053bb44a957f108 > 1053bb44676070e6: <Apr/13 02:44 pm>= 1106739234 delta, on CPU#0 <Apr/13 02:44 pm> [<c04051b3>] dump_trace+0x63/0x1eb <Apr/13 02:44 pm> [<c0405358>] show_trace_log_lvl+0x1d/0x3a <Apr/13 02:44 pm> [<c0405987>] show_trace+0x12/0x14 <Apr/13 02:44 pm> [<c0405a1a>] dump_stack+0x16/0x18 <Apr/13 02:44 pm> [<c0432d73>] do_gettimeofday+0x159/0x18c <Apr/13 02:44 pm> [<c042e093>] sys_gettimeofday+0x1d/0x58 <Apr/13 02:44 pm> [<c0404109>] syscall_call+0x7/0xb <Apr/13 02:44 pm> [<b7ef97f2>] 0xb7ef97f2 <Apr/13 02:44 pm> ======================= <Apr/13 02:44 pm>--------------------------- <Apr/13 02:44 pm>| preempt count: 00000000 ] <Apr/13 02:44 pm>| 0-level deep critical section nesting: <Apr/13 02:44 pm>---------------------------------------- Expected results: Test should pass Additional info:
Notes from internal con-call today: jburke: - IBM Athlon based system, 500mb mem - error when running a diversity of kernel stress tests - not exactly sure which precise test induced it - repeatable, every time on this one system - QA took the system for a standard RHEL issue so we can't reproduce immediately. Recommendation: Ask IBM if they are seeing this and if they have any ideas.
********** System Information ********** Hostname = ibm-alishan Kernel Version = 2.6.20-14.el5rt Machine Hardware Name = i686 Processor Type = athlon uname -a output = Linux ibm-alishan 2.6.20-14.el5rt #1 SMP PREEMPT Fri Apr 13 10:39:25 EDT 2007 i686 athlon i386 GNU/Linux Swap Size = 1023 MB Mem Size = 485 MB Number of Processors = 2 System Release = Red Hat Enterprise Linux Server release 5 (Tikanga) Command Line = ro root=/dev/VolGroup00/LogVol00 console=ttyS0,115200 System NMI Interrupts = NMI: 0 0 ********** LSPCI ********** 00:00.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a3) 00:01.0 ISA bridge: nVidia Corporation CK804 ISA Bridge (rev f3) 00:01.1 SMBus: nVidia Corporation CK804 SMBus (rev a2) 00:02.0 USB Controller: nVidia Corporation CK804 USB Controller (rev a2) 00:02.1 USB Controller: nVidia Corporation CK804 USB Controller (rev a3) 00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2) 00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) 00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) 00:09.0 PCI bridge: nVidia Corporation CK804 PCI Bridge (rev f2) 00:0b.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev f3) 00:0d.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev f3) 00:0e.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 01:02.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02) 02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet PCI Express (rev 21) ********** Modprob ********** alias eth0 tg3 alias scsi_hostadapter sata_nv ********** Module Information ********** Checking module information autofs4: Checking module information hidp: Bluetooth HIDP ver 1.1 Checking module information rfcomm: Bluetooth RFCOMM ver 1.8 Checking module information l2cap: Bluetooth L2CAP ver 2.8 Checking module information bluetooth: Bluetooth Core ver 2.11 Checking module information sunrpc: Checking module information ipv6: IPv6 protocol stack for Linux Checking module information cpufreq_ondemand: 'cpufreq_ondemand' - A dynamic cpufreq governor for Low Latency Frequency Transition capable processors Checking module information video: ACPI Video Driver Checking module information sbs: Smart Battery System ACPI interface driver Checking module information i2c_ec: ACPI EC SMBus driver Checking module information dock: ACPI Dock Station Driver Checking module information button: ACPI Button Driver Checking module information battery: ACPI Battery Driver Checking module information asus_acpi: Asus Laptop ACPI Extras Driver Checking module information backlight: Backlight Lowlevel Control Abstraction Checking module information ac: ACPI AC Adapter Driver Checking module information lp: Checking module information floppy: Checking module information pata_amd: low-level driver for AMD PATA IDE Checking module information sg: SCSI generic (sg) driver Checking module information cfi_cmdset_0002: MTD chip driver for AMD/Fujitsu flash chips Checking module information cfi_util: Checking module information mtdpart: Generic support for partitioning of MTD devices Checking module information parport_pc: PC-style parallel port driver Checking module information parport: Checking module information jedec_probe: Probe code for JEDEC-compliant flash chips Checking module information cfi_probe: Probe code for CFI-compliant flash chips Checking module information k8temp: AMD K8 core temperature monitor Checking module information gen_probe: Helper routines for flash chip probe code Checking module information hwmon: hardware monitoring sysfs/class support Checking module information ck804xrom: MTD map driver for BIOS chips on the Nvidia ck804 southbridge Checking module information tg3: Broadcom Tigon3 ethernet driver Checking module information ide_cd: ATAPI CD-ROM Driver Checking module information mtdcore: Core MTD registration and access routines Checking module information pcspkr: PC Speaker beeper driver Checking module information i2c_nforce2: nForce2/3/4/5xx SMBus driver Checking module information chipreg: Core routines for registering and invoking MTD chip drivers Checking module information cdrom: Checking module information i2c_core: I2C-Bus main module Checking module information serio_raw: Raw serio driver Checking module information dm_snapshot: device-mapper snapshot target Checking module information dm_zero: device-mapper dummy target returning zeros Checking module information dm_mirror: device-mapper mirror target Checking module information dm_mod: device-mapper driver Checking module information ata_generic: low-level driver for generic ATA Checking module information sata_nv: low-level driver for NVIDIA nForce SATA controller Checking module information libata: Library module for ATA devices Checking module information sd_mod: SCSI disk (sd) driver Checking module information scsi_mod: SCSI core Checking module information ext3: Second Extended Filesystem with journaling extensions Checking module information jbd: Checking module information ehci_hcd: 10 Dec 2004 USB 2.0 'Enhanced' Host Controller (EHCI) Driver Checking module information ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) Driver Checking module information uhci_hcd: USB Universal Host Controller Interface driver
I know Ingo had a variant of the paranoid timekeeping check included for awhile. Although I've not been convinced that it didn't throw false positives. Few questions: 1) What type of IBM system is this? 2) Can it be reproduced w/ the current RHEL5-rt kernel? 3) Can you attach dmesg output on the box?
Few questions: 1) What type of IBM system is this? IBM eServer x3105 -[434774Z]- 2) Can it be reproduced w/ the current RHEL5-rt kernel? System is currently in use by QE for RHEL3-U9 testing. I was hoping that IBM could try and reproduce it on similar hardware. Once that hardware becomes available again I will try it. 3) Can you attach dmesg output on the box? I don't have a dmesg output I have the /var/log/messages from that failure. I will attach it to the BZ.
Created attachment 155026 [details] /var/log/messages file