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    SubjectRe: [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c
    On Sun, Dec 19, 2010 at 03:03:13AM +0100, Miklos Vajna <vmiklos@frugalware.org> wrote:
    > Here is a panic I got today:
    >
    > http://frugalware.org/~vmiklos/pics/bug/2.6.37-rc6.png
    >
    > More details:
    >
    > I get this sometimes on boot or shutdown when testing systemd. I did not
    > get it with sysvinit, so I guess it may be related to systemd's heavy
    > cgroups usage, but I'm not sure. Sadly it isn't 100% reproducible but I
    > usually hit it at least once a day.
    >
    > The config is here:
    > http://frugalware.org/~vmiklos/logs/2.6.37-rc6.config (I just did a
    > yes "" | make config to update it to 2.6.37-rc6.)
    >
    > I got something similar with 2.6.36.1 as well:
    >
    > http://frugalware.org/~vmiklos/pics/bug/2.6.36.1.png
    >
    > Ah, and this is on i686 in VMware - though given that I never had this
    > problem with systemd, I guess it won't be an emulator bug. :)
    >
    > I'm not familiar with the sched code, is it possible that this is
    > related?

    A few more info:

    - I reproduced the issue on my Lenovo S12 netbook as well, so it's not a
    virtual machine-related bug. Here is a poor shot:
    http://frugalware.org/~vmiklos/pics/bug/p1040730.jpg
    - I'm also attaching the full dmesg in the VM that is finally a text
    using serial console.
    - On "how to reproduce": sometimes I just get this during boot. If it
    does not occur, then it does when using "systemctl emergency".

    Please let me know if you need more info.

    Thanks,

    Miklos
    Initializing cgroup subsys cpuset
    Initializing cgroup subsys cpu
    Linux version 2.6.36-fw3 (fst@i686.frugalware.org) (gcc version 4.5.1 (Frugalware Linux) ) #1 SMP PREEMPT Wed Dec 8 13:27:40 CET 2010
    BIOS-provided physical RAM map:
    BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
    BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
    BIOS-e820: 00000000000ca000 - 00000000000cc000 (reserved)
    BIOS-e820: 00000000000dc000 - 00000000000e4000 (reserved)
    BIOS-e820: 00000000000e8000 - 0000000000100000 (reserved)
    BIOS-e820: 0000000000100000 - 000000001fef0000 (usable)
    BIOS-e820: 000000001fef0000 - 000000001feff000 (ACPI data)
    BIOS-e820: 000000001feff000 - 000000001ff00000 (ACPI NVS)
    BIOS-e820: 000000001ff00000 - 0000000020000000 (usable)
    BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
    BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
    BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
    BIOS-e820: 00000000fffe0000 - 0000000100000000 (reserved)
    Notice: NX (Execute Disable) protection cannot be enabled: non-PAE kernel!
    DMI present.
    Phoenix BIOS detected: BIOS may corrupt low RAM, working around it.
    Hypervisor detected: VMware
    last_pfn = 0x20000 max_arch_pfn = 0x100000
    x86 PAT enabled: cpu 0, old 0x0, new 0x7010600070106
    mtrr: your BIOS has configured an incorrect mask, fixing it.
    Scanning 0 areas for low memory corruption
    modified physical RAM map:
    modified: 0000000000000000 - 0000000000010000 (reserved)
    modified: 0000000000010000 - 000000000009f800 (usable)
    modified: 000000000009f800 - 00000000000a0000 (reserved)
    modified: 00000000000ca000 - 00000000000cc000 (reserved)
    modified: 00000000000dc000 - 00000000000e4000 (reserved)
    modified: 00000000000e8000 - 0000000000100000 (reserved)
    modified: 0000000000100000 - 000000001fef0000 (usable)
    modified: 000000001fef0000 - 000000001feff000 (ACPI data)
    modified: 000000001feff000 - 000000001ff00000 (ACPI NVS)
    modified: 000000001ff00000 - 0000000020000000 (usable)
    modified: 00000000e0000000 - 00000000f0000000 (reserved)
    modified: 00000000fec00000 - 00000000fec10000 (reserved)
    modified: 00000000fee00000 - 00000000fee01000 (reserved)
    modified: 00000000fffe0000 - 0000000100000000 (reserved)
    found SMP MP-table at [c00f69b0] f69b0
    init_memory_mapping: 0000000000000000-0000000020000000
    ACPI: RSDP 000f6940 00024 (v02 PTLTD )
    ACPI: XSDT 1fef0804 0004C (v01 INTEL 440BX 06040000 VMW 01324272)
    ACPI: FACP 1fefee98 000F4 (v04 INTEL 440BX 06040000 PTL 000F4240)
    ACPI: DSDT 1fef09bc 0E4DC (v01 PTLTD Custom 06040000 MSFT 03000001)
    ACPI: FACS 1fefffc0 00040
    ACPI: BOOT 1fef0994 00028 (v01 PTLTD $SBFTBL$ 06040000 LTP 00000001)
    ACPI: APIC 1fef0944 00050 (v01 PTLTD ? APIC 06040000 LTP 00000000)
    ACPI: MCFG 1fef0908 0003C (v01 PTLTD $PCITBL$ 06040000 LTP 00000001)
    ACPI: SRAT 1fef0888 00080 (v02 VMWARE MEMPLUG 06040000 VMW 00000001)
    0MB HIGHMEM available.
    512MB LOWMEM available.
    mapped low ram: 0 - 20000000
    low ram: 0 - 20000000
    Zone PFN ranges:
    DMA 0x00000010 -> 0x00001000
    Normal 0x00001000 -> 0x00020000
    HighMem empty
    Movable zone start PFN for each node
    early_node_map[3] active PFN ranges
    0: 0x00000010 -> 0x0000009f
    0: 0x00000100 -> 0x0001fef0
    0: 0x0001ff00 -> 0x00020000
    Using APIC driver default
    ACPI: PM-Timer IO Port: 0x1008
    ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
    ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
    ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0])
    IOAPIC[0]: apic_id 1, version 17, address 0xfec00000, GSI 0-23
    ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 high edge)
    Using ACPI (MADT) for SMP configuration information
    SMP: Allowing 1 CPUs, 0 hotplug CPUs
    PM: Registered nosave memory: 000000000009f000 - 00000000000a0000
    PM: Registered nosave memory: 00000000000a0000 - 00000000000ca000
    PM: Registered nosave memory: 00000000000ca000 - 00000000000cc000
    PM: Registered nosave memory: 00000000000cc000 - 00000000000dc000
    PM: Registered nosave memory: 00000000000dc000 - 00000000000e4000
    PM: Registered nosave memory: 00000000000e4000 - 00000000000e8000
    PM: Registered nosave memory: 00000000000e8000 - 0000000000100000
    PM: Registered nosave memory: 000000001fef0000 - 000000001feff000
    PM: Registered nosave memory: 000000001feff000 - 000000001ff00000
    Allocating PCI resources starting at 20000000 (gap: 20000000:c0000000)
    Booting paravirtualized kernel on bare hardware
    setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:1 nr_node_ids:1
    PERCPU: Embedded 14 pages/cpu @c2000000 s33296 r0 d24048 u4194304
    pcpu-alloc: s33296 r0 d24048 u4194304 alloc=1*4194304
    pcpu-alloc: [0] 0
    Built 1 zonelists in Zone order, mobility grouping on. Total pages: 129919
    Kernel command line: root=/dev/sda1 ro console=ttyS1 console=tty0 init=/bin/systemd
    PID hash table entries: 2048 (order: 1, 8192 bytes)
    Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
    Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
    Enabling fast FPU save and restore... done.
    Enabling unmasked SIMD FPU exception support... done.
    Initializing CPU#0
    allocated 2621120 bytes of page_cgroup
    please try 'cgroup_disable=memory' option if you don't want memory cgroups
    Subtract (47 early reservations)
    #1 [0000001000 - 0000002000] EX TRAMPOLINE
    #2 [0001000000 - 000183e7c4] TEXT DATA BSS
    #3 [000183f000 - 00018461c0] BRK
    #4 [00000f69c0 - 0000100000] BIOS reserved
    #5 [00000f69b0 - 00000f69c0] MP-table mpf
    #6 [000009f800 - 000009fd70] BIOS reserved
    #7 [000009fe78 - 00000f69b0] BIOS reserved
    #8 [000009fd70 - 000009fe78] MP-table mpc
    #9 [0000010000 - 0000011000] TRAMPOLINE
    #10 [0000011000 - 0000015000] ACPI WAKEUP
    #11 [0001847000 - 0001848000] BOOTMEM
    #12 [0001848000 - 0001c48000] BOOTMEM
    #13 [000183e7d0 - 000183e7d4] BOOTMEM
    #14 [000183e7e0 - 000183e8a0] BOOTMEM
    #15 [000183e8a0 - 000183e8d0] BOOTMEM
    #16 [0001c48000 - 0001c49800] BOOTMEM
    #17 [000183e8d0 - 000183e8f7] BOOTMEM
    #18 [000183e900 - 000183ea88] BOOTMEM
    #19 [000183ea90 - 000183ead0] BOOTMEM
    #20 [000183ead0 - 000183eb10] BOOTMEM
    #21 [000183eb10 - 000183eb50] BOOTMEM
    #22 [000183eb50 - 000183eb90] BOOTMEM
    #23 [000183eb90 - 000183ebd0] BOOTMEM
    #24 [000183ebd0 - 000183ec10] BOOTMEM
    #25 [000183ec10 - 000183ec50] BOOTMEM
    #26 [000183ec50 - 000183ec90] BOOTMEM
    #27 [000183ec90 - 000183ecd0] BOOTMEM
    #28 [000183ecd0 - 000183ed10] BOOTMEM
    #29 [000183ed10 - 000183ed50] BOOTMEM
    #30 [000183ed50 - 000183ed90] BOOTMEM
    #31 [000183ed90 - 000183edd0] BOOTMEM
    #32 [000183edd0 - 000183ede0] BOOTMEM
    #33 [000183ede0 - 000183edf0] BOOTMEM
    #34 [000183edf0 - 000183ee2f] BOOTMEM
    #35 [000183ee30 - 000183ee6f] BOOTMEM
    #36 [0002000000 - 000200e000] BOOTMEM
    #37 [000183ee70 - 000183ee74] BOOTMEM
    #38 [000183ee80 - 000183ee84] BOOTMEM
    #39 [000183ee90 - 000183ee94] BOOTMEM
    #40 [000183eea0 - 000183eea4] BOOTMEM
    #41 [000183eeb0 - 000183ef60] BOOTMEM
    #42 [00018461c0 - 0001846268] BOOTMEM
    #43 [0001c49800 - 0001c4b800] BOOTMEM
    #44 [0001c4b800 - 0001c8b800] BOOTMEM
    #45 [0001c8b800 - 0001cab800] BOOTMEM
    #46 [0001cac000 - 0001f2bec0] BOOTMEM
    Initializing HighMem for node 0 (00000000:00000000)
    Memory: 508160k/524288k available (5423k kernel code, 15612k reserved, 1960k data, 504k init, 0k highmem)
    virtual kernel memory layout:
    fixmap : 0xfff17000 - 0xfffff000 ( 928 kB)
    pkmap : 0xff800000 - 0xffc00000 (4096 kB)
    vmalloc : 0xe0800000 - 0xff7fe000 ( 495 MB)
    lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
    .init : 0xc1736000 - 0xc17b4000 ( 504 kB)
    .data : 0xc154bd73 - 0xc1735dcc (1960 kB)
    .text : 0xc1000000 - 0xc154bd73 (5423 kB)
    Checking if this processor honours the WP bit even in supervisor mode...Ok.
    SLUB: Genslabs=13, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
    Hierarchical RCU implementation.
    RCU-based detection of stalled CPUs is disabled.
    Verbose stalled-CPUs detection is disabled.
    NR_IRQS:2304 nr_irqs:256
    Extended CMOS year: 2000
    Console: colour VGA+ 80x25
    console [tty0] enabled
    console [ttyS1] enabled
    TSC freq read from hypervisor : 1548.584 MHz
    Detected 1548.584 MHz processor.
    Calibrating delay loop (skipped) preset value.. 3097.16 BogoMIPS (lpj=1548584)
    pid_max: default: 32768 minimum: 301
    Security Framework initialized
    AppArmor: AppArmor disabled by boot time parameter
    Mount-cache hash table entries: 512
    Initializing cgroup subsys ns
    Initializing cgroup subsys cpuacct
    Initializing cgroup subsys memory
    Initializing cgroup subsys devices
    Initializing cgroup subsys freezer
    mce: CPU supports 0 MCE banks
    Performance Events:
    SMP alternatives: switching to UP code
    Freeing SMP alternatives: 24k freed
    ACPI: Core revision 20100702
    Enabling APIC mode: Flat. Using 1 I/O APICs
    ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
    CPU0: Centaur VIA Nano processor U2250 (1.6GHz Capable) stepping 03
    Brought up 1 CPUs
    Total of 1 processors activated (3097.16 BogoMIPS).
    devtmpfs: initialized
    xor: automatically using best checksumming function: pIII_sse
    pIII_sse : 2108.000 MB/sec
    xor: using function: pIII_sse (2108.000 MB/sec)
    regulator: core version 0.5
    NET: Registered protocol family 16
    EISA bus registered
    ACPI: bus type pci registered
    PCI: Using configuration type 1 for base access
    bio: create slab <bio-0> at 0
    raid6: int32x1 347 MB/s
    raid6: int32x2 222 MB/s
    raid6: int32x4 113 MB/s
    raid6: int32x8 82 MB/s
    raid6: mmxx1 449 MB/s
    raid6: mmxx2 417 MB/s
    raid6: sse1x1 449 MB/s
    raid6: sse1x2 429 MB/s
    raid6: sse2x1 792 MB/s
    raid6: sse2x2 808 MB/s
    raid6: using algorithm sse2x2 (808 MB/s)
    ACPI: BIOS _OSI(Linux) query ignored
    ACPI: Interpreter enabled
    ACPI: (supports S0 S1 S4 S5)
    ACPI: Using IOAPIC for interrupt routing
    ACPI: No dock devices found.
    PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
    ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
    pci_root PNP0A03:00: host bridge window [mem 0x000a0000-0x000bffff]
    pci_root PNP0A03:00: host bridge window [mem 0x000cc000-0x000cffff]
    pci_root PNP0A03:00: host bridge window [mem 0x000d0000-0x000d3fff]
    pci_root PNP0A03:00: host bridge window [mem 0x000d4000-0x000d7fff]
    pci_root PNP0A03:00: host bridge window [mem 0x000d8000-0x000dbfff]
    pci_root PNP0A03:00: host bridge window [mem 0x000e4000-0x000e7fff]
    pci_root PNP0A03:00: host bridge window [mem 0x20000000-0xfebfffff]
    pci_root PNP0A03:00: host bridge window [io 0x0000-0x0cf7]
    pci_root PNP0A03:00: host bridge window [io 0x0d00-0xfeff]
    pci 0000:00:07.3: quirk: [io 0x1000-0x103f] claimed by PIIX4 ACPI
    pci 0000:00:07.3: quirk: [io 0x1040-0x104f] claimed by PIIX4 SMB
    pci 0000:00:01.0: PCI bridge to [bus 01-01]
    pci 0000:00:11.0: PCI bridge to [bus 02-02] (subtractive decode)
    pci 0000:00:15.0: PCI bridge to [bus 03-03]
    pci 0000:00:15.1: PCI bridge to [bus 04-04]
    pci 0000:00:15.2: PCI bridge to [bus 05-05]
    pci 0000:00:15.3: PCI bridge to [bus 06-06]
    pci 0000:00:15.4: PCI bridge to [bus 07-07]
    pci 0000:00:15.5: PCI bridge to [bus 08-08]
    pci 0000:00:15.6: PCI bridge to [bus 09-09]
    pci 0000:00:15.7: PCI bridge to [bus 0a-0a]
    pci 0000:00:16.0: PCI bridge to [bus 0b-0b]
    pci 0000:00:16.1: PCI bridge to [bus 0c-0c]
    pci 0000:00:16.2: PCI bridge to [bus 0d-0d]
    pci 0000:00:16.3: PCI bridge to [bus 0e-0e]
    pci 0000:00:16.4: PCI bridge to [bus 0f-0f]
    pci 0000:00:16.5: PCI bridge to [bus 10-10]
    pci 0000:00:16.6: PCI bridge to [bus 11-11]
    pci 0000:00:16.7: PCI bridge to [bus 12-12]
    pci 0000:00:17.0: PCI bridge to [bus 13-13]
    pci 0000:00:17.1: PCI bridge to [bus 14-14]
    pci 0000:00:17.2: PCI bridge to [bus 15-15]
    pci 0000:00:17.3: PCI bridge to [bus 16-16]
    pci 0000:00:17.4: PCI bridge to [bus 17-17]
    pci 0000:00:17.5: PCI bridge to [bus 18-18]
    pci 0000:00:17.6: PCI bridge to [bus 19-19]
    pci 0000:00:17.7: PCI bridge to [bus 1a-1a]
    pci 0000:00:18.0: PCI bridge to [bus 1b-1b]
    pci 0000:00:18.1: PCI bridge to [bus 1c-1c]
    pci 0000:00:18.2: PCI bridge to [bus 1d-1d]
    pci 0000:00:18.3: PCI bridge to [bus 1e-1e]
    pci 0000:00:18.4: PCI bridge to [bus 1f-1f]
    pci 0000:00:18.5: PCI bridge to [bus 20-20]
    pci 0000:00:18.6: PCI bridge to [bus 21-21]
    pci 0000:00:18.7: PCI bridge to [bus 22-22]
    ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 *9 10 11 14 15)
    ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 10 *11 14 15)
    ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 *10 11 14 15)
    ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 *5 6 7 9 10 11 14 15)
    vgaarb: device added: PCI:0000:00:0f.0,decodes=io+mem,owns=io+mem,locks=none
    vgaarb: loaded
    SCSI subsystem initialized
    usbcore: registered new interface driver usbfs
    usbcore: registered new interface driver hub
    usbcore: registered new device driver usb
    PCI: Using ACPI for IRQ routing
    pci 0000:00:18.2: no compatible bridge window for [io 0xf000-0xffff]
    NetLabel: Initializing
    NetLabel: domain hash size = 128
    NetLabel: protocols = UNLABELED CIPSOv4
    NetLabel: unlabeled traffic allowed by default
    Switching to clocksource tsc
    pnp: PnP ACPI init
    ACPI: bus type pnp registered
    pnp: PnP ACPI: found 13 devices
    ACPI: ACPI bus type pnp unregistered
    PnPBIOS: Disabled by ACPI PNP
    system 00:01: [io 0x1000-0x103f] has been reserved
    system 00:01: [io 0x1040-0x104f] has been reserved
    system 00:01: [io 0x0cf0-0x0cf1] has been reserved
    system 00:0c: [io 0x1060-0x107f] has been reserved
    system 00:0c: [mem 0xe0000000-0xefffffff] has been reserved
    system 00:0c: [mem 0xdbe00000-0xdbffffff] has been reserved
    pci 0000:00:0f.0: BAR 6: assigned [mem 0x20000000-0x20007fff pref]
    pci 0000:00:10.0: BAR 6: assigned [mem 0x20008000-0x2000bfff pref]
    pci 0000:00:15.3: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:15.4: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:15.5: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:15.6: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:15.7: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:16.3: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:16.4: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:16.5: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:16.6: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:16.7: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:17.3: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:17.4: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:17.5: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:17.6: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:17.7: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:18.2: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:18.3: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:18.4: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:18.5: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:18.6: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:18.7: BAR 13: can't assign io (size 0x1000)
    pci 0000:00:01.0: PCI bridge to [bus 01-01]
    pci 0000:00:01.0: bridge window [io disabled]
    pci 0000:00:01.0: bridge window [mem disabled]
    pci 0000:00:01.0: bridge window [mem pref disabled]
    pci 0000:02:01.0: BAR 6: assigned [mem 0xdc400000-0xdc40ffff pref]
    pci 0000:00:11.0: PCI bridge to [bus 02-02]
    pci 0000:00:11.0: bridge window [io 0x2000-0x3fff]
    pci 0000:00:11.0: bridge window [mem 0xd8900000-0xd9cfffff]
    pci 0000:00:11.0: bridge window [mem 0xdc400000-0xdc9fffff 64bit pref]
    pci 0000:00:15.0: PCI bridge to [bus 03-03]
    pci 0000:00:15.0: bridge window [io 0x4000-0x4fff]
    pci 0000:00:15.0: bridge window [mem 0xd9d00000-0xd9dfffff]
    pci 0000:00:15.0: bridge window [mem 0xdca00000-0xdcafffff 64bit pref]
    pci 0000:00:15.1: PCI bridge to [bus 04-04]
    pci 0000:00:15.1: bridge window [io 0x8000-0x8fff]
    pci 0000:00:15.1: bridge window [mem 0xda100000-0xda1fffff]
    pci 0000:00:15.1: bridge window [mem 0xdce00000-0xdcefffff 64bit pref]
    pci 0000:00:15.2: PCI bridge to [bus 05-05]
    pci 0000:00:15.2: bridge window [io 0xc000-0xcfff]
    pci 0000:00:15.2: bridge window [mem 0xda500000-0xda5fffff]
    pci 0000:00:15.2: bridge window [mem 0xdd200000-0xdd2fffff 64bit pref]
    pci 0000:00:15.3: PCI bridge to [bus 06-06]
    pci 0000:00:15.3: bridge window [io disabled]
    pci 0000:00:15.3: bridge window [mem 0xda900000-0xda9fffff]
    pci 0000:00:15.3: bridge window [mem 0xdd600000-0xdd6fffff 64bit pref]
    pci 0000:00:15.4: PCI bridge to [bus 07-07]
    pci 0000:00:15.4: bridge window [io disabled]
    pci 0000:00:15.4: bridge window [mem 0xdad00000-0xdadfffff]
    pci 0000:00:15.4: bridge window [mem 0xdda00000-0xddafffff 64bit pref]
    pci 0000:00:15.5: PCI bridge to [bus 08-08]
    pci 0000:00:15.5: bridge window [io disabled]
    pci 0000:00:15.5: bridge window [mem 0xdb100000-0xdb1fffff]
    pci 0000:00:15.5: bridge window [mem 0xdde00000-0xddefffff 64bit pref]
    pci 0000:00:15.6: PCI bridge to [bus 09-09]
    pci 0000:00:15.6: bridge window [io disabled]
    pci 0000:00:15.6: bridge window [mem 0xdb500000-0xdb5fffff]
    pci 0000:00:15.6: bridge window [mem 0xde200000-0xde2fffff 64bit pref]
    pci 0000:00:15.7: PCI bridge to [bus 0a-0a]
    pci 0000:00:15.7: bridge window [io disabled]
    pci 0000:00:15.7: bridge window [mem 0xdb900000-0xdb9fffff]
    pci 0000:00:15.7: bridge window [mem 0xde600000-0xde6fffff 64bit pref]
    pci 0000:00:16.0: PCI bridge to [bus 0b-0b]
    pci 0000:00:16.0: bridge window [io 0x5000-0x5fff]
    pci 0000:00:16.0: bridge window [mem 0xd9e00000-0xd9efffff]
    pci 0000:00:16.0: bridge window [mem 0xdcb00000-0xdcbfffff 64bit pref]
    pci 0000:00:16.1: PCI bridge to [bus 0c-0c]
    pci 0000:00:16.1: bridge window [io 0x9000-0x9fff]
    pci 0000:00:16.1: bridge window [mem 0xda200000-0xda2fffff]
    pci 0000:00:16.1: bridge window [mem 0xdcf00000-0xdcffffff 64bit pref]
    pci 0000:00:16.2: PCI bridge to [bus 0d-0d]
    pci 0000:00:16.2: bridge window [io 0xd000-0xdfff]
    pci 0000:00:16.2: bridge window [mem 0xda600000-0xda6fffff]
    pci 0000:00:16.2: bridge window [mem 0xdd300000-0xdd3fffff 64bit pref]
    pci 0000:00:16.3: PCI bridge to [bus 0e-0e]
    pci 0000:00:16.3: bridge window [io disabled]
    pci 0000:00:16.3: bridge window [mem 0xdaa00000-0xdaafffff]
    pci 0000:00:16.3: bridge window [mem 0xdd700000-0xdd7fffff 64bit pref]
    pci 0000:00:16.4: PCI bridge to [bus 0f-0f]
    pci 0000:00:16.4: bridge window [io disabled]
    pci 0000:00:16.4: bridge window [mem 0xdae00000-0xdaefffff]
    pci 0000:00:16.4: bridge window [mem 0xddb00000-0xddbfffff 64bit pref]
    pci 0000:00:16.5: PCI bridge to [bus 10-10]
    pci 0000:00:16.5: bridge window [io disabled]
    pci 0000:00:16.5: bridge window [mem 0xdb200000-0xdb2fffff]
    pci 0000:00:16.5: bridge window [mem 0xddf00000-0xddffffff 64bit pref]
    pci 0000:00:16.6: PCI bridge to [bus 11-11]
    pci 0000:00:16.6: bridge window [io disabled]
    pci 0000:00:16.6: bridge window [mem 0xdb600000-0xdb6fffff]
    pci 0000:00:16.6: bridge window [mem 0xde300000-0xde3fffff 64bit pref]
    pci 0000:00:16.7: PCI bridge to [bus 12-12]
    pci 0000:00:16.7: bridge window [io disabled]
    pci 0000:00:16.7: bridge window [mem 0xdba00000-0xdbafffff]
    pci 0000:00:16.7: bridge window [mem 0xde700000-0xde7fffff 64bit pref]
    pci 0000:00:17.0: PCI bridge to [bus 13-13]
    pci 0000:00:17.0: bridge window [io 0x6000-0x6fff]
    pci 0000:00:17.0: bridge window [mem 0xd9f00000-0xd9ffffff]
    pci 0000:00:17.0: bridge window [mem 0xdcc00000-0xdccfffff 64bit pref]
    pci 0000:00:17.1: PCI bridge to [bus 14-14]
    pci 0000:00:17.1: bridge window [io 0xa000-0xafff]
    pci 0000:00:17.1: bridge window [mem 0xda300000-0xda3fffff]
    pci 0000:00:17.1: bridge window [mem 0xdd000000-0xdd0fffff 64bit pref]
    pci 0000:00:17.2: PCI bridge to [bus 15-15]
    pci 0000:00:17.2: bridge window [io 0xe000-0xefff]
    pci 0000:00:17.2: bridge window [mem 0xda700000-0xda7fffff]
    pci 0000:00:17.2: bridge window [mem 0xdd400000-0xdd4fffff 64bit pref]
    pci 0000:00:17.3: PCI bridge to [bus 16-16]
    pci 0000:00:17.3: bridge window [io disabled]
    pci 0000:00:17.3: bridge window [mem 0xdab00000-0xdabfffff]
    pci 0000:00:17.3: bridge window [mem 0xdd800000-0xdd8fffff 64bit pref]
    pci 0000:00:17.4: PCI bridge to [bus 17-17]
    pci 0000:00:17.4: bridge window [io disabled]
    pci 0000:00:17.4: bridge window [mem 0xdaf00000-0xdaffffff]
    pci 0000:00:17.4: bridge window [mem 0xddc00000-0xddcfffff 64bit pref]
    pci 0000:00:17.5: PCI bridge to [bus 18-18]
    pci 0000:00:17.5: bridge window [io disabled]
    pci 0000:00:17.5: bridge window [mem 0xdb300000-0xdb3fffff]
    pci 0000:00:17.5: bridge window [mem 0xde000000-0xde0fffff 64bit pref]
    pci 0000:00:17.6: PCI bridge to [bus 19-19]
    pci 0000:00:17.6: bridge window [io disabled]
    pci 0000:00:17.6: bridge window [mem 0xdb700000-0xdb7fffff]
    pci 0000:00:17.6: bridge window [mem 0xde400000-0xde4fffff 64bit pref]
    pci 0000:00:17.7: PCI bridge to [bus 1a-1a]
    pci 0000:00:17.7: bridge window [io disabled]
    pci 0000:00:17.7: bridge window [mem 0xdbb00000-0xdbbfffff]
    pci 0000:00:17.7: bridge window [mem 0xde800000-0xde8fffff 64bit pref]
    pci 0000:00:18.0: PCI bridge to [bus 1b-1b]
    pci 0000:00:18.0: bridge window [io 0x7000-0x7fff]
    pci 0000:00:18.0: bridge window [mem 0xda000000-0xda0fffff]
    pci 0000:00:18.0: bridge window [mem 0xdcd00000-0xdcdfffff 64bit pref]
    pci 0000:00:18.1: PCI bridge to [bus 1c-1c]
    pci 0000:00:18.1: bridge window [io 0xb000-0xbfff]
    pci 0000:00:18.1: bridge window [mem 0xda400000-0xda4fffff]
    pci 0000:00:18.1: bridge window [mem 0xdd100000-0xdd1fffff 64bit pref]
    pci 0000:00:18.2: PCI bridge to [bus 1d-1d]
    pci 0000:00:18.2: bridge window [io disabled]
    pci 0000:00:18.2: bridge window [mem 0xda800000-0xda8fffff]
    pci 0000:00:18.2: bridge window [mem 0xdd500000-0xdd5fffff 64bit pref]
    pci 0000:00:18.3: PCI bridge to [bus 1e-1e]
    pci 0000:00:18.3: bridge window [io disabled]
    pci 0000:00:18.3: bridge window [mem 0xdac00000-0xdacfffff]
    pci 0000:00:18.3: bridge window [mem 0xdd900000-0xdd9fffff 64bit pref]
    pci 0000:00:18.4: PCI bridge to [bus 1f-1f]
    pci 0000:00:18.4: bridge window [io disabled]
    pci 0000:00:18.4: bridge window [mem 0xdb000000-0xdb0fffff]
    pci 0000:00:18.4: bridge window [mem 0xddd00000-0xdddfffff 64bit pref]
    pci 0000:00:18.5: PCI bridge to [bus 20-20]
    pci 0000:00:18.5: bridge window [io disabled]
    pci 0000:00:18.5: bridge window [mem 0xdb400000-0xdb4fffff]
    pci 0000:00:18.5: bridge window [mem 0xde100000-0xde1fffff 64bit pref]
    pci 0000:00:18.6: PCI bridge to [bus 21-21]
    pci 0000:00:18.6: bridge window [io disabled]
    pci 0000:00:18.6: bridge window [mem 0xdb800000-0xdb8fffff]
    pci 0000:00:18.6: bridge window [mem 0xde500000-0xde5fffff 64bit pref]
    pci 0000:00:18.7: PCI bridge to [bus 22-22]
    pci 0000:00:18.7: bridge window [io disabled]
    pci 0000:00:18.7: bridge window [mem 0xdbc00000-0xdbcfffff]
    pci 0000:00:18.7: bridge window [mem 0xde900000-0xde9fffff 64bit pref]
    NET: Registered protocol family 2
    IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
    TCP established hash table entries: 16384 (order: 5, 131072 bytes)
    TCP bind hash table entries: 16384 (order: 5, 131072 bytes)
    TCP: Hash tables configured (established 16384 bind 16384)
    TCP reno registered
    UDP hash table entries: 256 (order: 1, 8192 bytes)
    UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
    NET: Registered protocol family 1
    pci 0000:00:00.0: Limiting direct PCI/PCI transfers
    Simple Boot Flag at 0x36 set to 0x1
    Scanning for low memory corruption every 60 seconds
    audit: initializing netlink socket (disabled)
    type=2000 audit(1292693630.593:1): initialized
    VFS: Disk quotas dquot_6.5.2
    Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
    SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled
    SGI XFS Quota Management subsystem
    msgmni has been set to 992
    async_tx: api initialized (async)
    Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
    io scheduler noop registered
    io scheduler deadline registered
    io scheduler cfq registered (default)
    pcieport 0000:00:15.0: ACPI _OSC control granted for 0x15
    pcieport 0000:00:15.1: ACPI _OSC control granted for 0x15
    pcieport 0000:00:15.2: ACPI _OSC control granted for 0x15
    pcieport 0000:00:15.3: ACPI _OSC control granted for 0x15
    pcieport 0000:00:15.4: ACPI _OSC control granted for 0x15
    pcieport 0000:00:15.5: ACPI _OSC control granted for 0x15
    pcieport 0000:00:15.6: ACPI _OSC control granted for 0x15
    pcieport 0000:00:15.7: ACPI _OSC control granted for 0x15
    pcieport 0000:00:16.0: ACPI _OSC control granted for 0x15
    pcieport 0000:00:16.1: ACPI _OSC control granted for 0x15
    pcieport 0000:00:16.2: ACPI _OSC control granted for 0x15
    pcieport 0000:00:16.3: ACPI _OSC control granted for 0x15
    pcieport 0000:00:16.4: ACPI _OSC control granted for 0x15
    pcieport 0000:00:16.5: ACPI _OSC control granted for 0x15
    pcieport 0000:00:16.6: ACPI _OSC control granted for 0x15
    pcieport 0000:00:16.7: ACPI _OSC control granted for 0x15
    pcieport 0000:00:17.0: ACPI _OSC control granted for 0x15
    pcieport 0000:00:17.1: ACPI _OSC control granted for 0x15
    pcieport 0000:00:17.2: ACPI _OSC control granted for 0x15
    pcieport 0000:00:17.3: ACPI _OSC control granted for 0x15
    pcieport 0000:00:17.4: ACPI _OSC control granted for 0x15
    pcieport 0000:00:17.5: ACPI _OSC control granted for 0x15
    pcieport 0000:00:17.6: ACPI _OSC control granted for 0x15
    pcieport 0000:00:17.7: ACPI _OSC control granted for 0x15
    pcieport 0000:00:18.0: ACPI _OSC control granted for 0x15
    pcieport 0000:00:18.1: ACPI _OSC control granted for 0x15
    pcieport 0000:00:18.2: ACPI _OSC control granted for 0x15
    pcieport 0000:00:18.3: ACPI _OSC control granted for 0x15
    pcieport 0000:00:18.4: ACPI _OSC control granted for 0x15
    pcieport 0000:00:18.5: ACPI _OSC control granted for 0x15
    pcieport 0000:00:18.6: ACPI _OSC control granted for 0x15
    pcieport 0000:00:18.7: ACPI _OSC control granted for 0x15
    pci_hotplug: PCI Hot Plug PCI Core version: 0.5
    isapnp: Scanning for PnP cards...
    isapnp: No Plug & Play device found
    Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
    serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
    ˙serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
    00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
    00:0a: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
    Floppy drive(s): fd0 is 1.44M
    FDC 0 is a post-1991 82077
    brd: module loaded
    Compaq SMART2 Driver (v 2.6.0)
    HP CISS Driver (v 3.6.26)
    Uniform Multi-Platform E-IDE driver
    ide-gd driver 1.18
    ide-cd driver 5.00
    stex: Promise SuperTrak EX Driver version: 4.6.0000.4
    scsi0 : ata_piix
    scsi1 : ata_piix
    ata1: PATA max UDMA/33 cmd 0x1f0 ctl 0x3f6 bmdma 0x10c0 irq 14
    ata2: PATA max UDMA/33 cmd 0x170 ctl 0x376 bmdma 0x10c8 irq 15
    Fusion MPT base driver 3.04.17
    Copyright (c) 1999-2008 LSI Corporation
    Fusion MPT SPI Host driver 3.04.17
    mptspi 0000:00:10.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
    mptbase: ioc0: Initiating bringup
    ioc0: LSI53C1030 B0: Capabilities={Initiator}
    scsi2 : ioc0: LSI53C1030 B0, FwRev=01032920h, Ports=1, MaxQ=128, IRQ=17
    ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
    ehci_hcd 0000:02:03.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
    ehci_hcd 0000:02:03.0: EHCI Host Controller
    ehci_hcd 0000:02:03.0: new USB bus registered, assigned bus number 1
    ehci_hcd 0000:02:03.0: irq 17, io mem 0xd8900000
    ehci_hcd 0000:02:03.0: USB 2.0 started, EHCI 1.00
    scsi 2:0:0:0: Direct-Access VMware, VMware Virtual S 1.0 PQ: 0 ANSI: 2
    usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
    scsi target2:0:0: Beginning Domain Validation
    usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    usb usb1: Product: EHCI Host Controller
    usb usb1: Manufacturer: Linux 2.6.36-fw3 ehci_hcd
    usb usb1: SerialNumber: 0000:02:03.0
    scsi target2:0:0: Domain Validation skipping write tests
    hub 1-0:1.0: USB hub found
    scsi target2:0:0: Ending Domain Validation
    hub 1-0:1.0: 6 ports detected
    scsi target2:0:0: FAST-40 WIDE SCSI 80.0 MB/s ST (25 ns, offset 127)
    ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
    uhci_hcd: USB Universal Host Controller Interface driver
    uhci_hcd 0000:02:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
    uhci_hcd 0000:02:00.0: UHCI Host Controller
    uhci_hcd 0000:02:00.0: new USB bus registered, assigned bus number 2
    uhci_hcd 0000:02:00.0: irq 18, io base 0x000020c0
    ata2.00: ATAPI: VMware Virtual IDE CDROM Drive, 00000001, max UDMA/33
    usb usb2: New USB device found, idVendor=1d6b, idProduct=0001
    ata2.00: configured for UDMA/33
    usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    usb usb2: Product: UHCI Host Controller
    usb usb2: Manufacturer: Linux 2.6.36-fw3 uhci_hcd
    sd 2:0:0:0: [sda] 16777216 512-byte logical blocks: (8.58 GB/8.00 GiB)
    usb usb2: SerialNumber: 0000:02:00.0
    sd 2:0:0:0: [sda] Write Protect is off
    sd 2:0:0:0: [sda] Cache data unavailable
    scsi: waiting for bus probes to complete ...
    sd 2:0:0:0: [sda] Assuming drive cache: write through
    scsi 1:0:0:0: CD-ROM NECVMWar VMware IDE CDR10 1.00 PQ: 0 ANSI: 5
    hub 2-0:1.0: USB hub found
    hub 2-0:1.0: 2 ports detected
    sd 2:0:0:0: [sda] Cache data unavailable
    sd 2:0:0:0: [sda] Assuming drive cache: write through
    Initializing USB Mass Storage driver...
    sr0: scsi3-mmc drive: 1x/1x xa/form2 cdda tray
    cdrom: Uniform CD-ROM driver Revision: 3.20
    usbcore: registered new interface driver usb-storage
    USB Mass Storage support registered.
    usbcore: registered new interface driver ums-alauda
    usbcore: registered new interface driver ums-cypress
    sda: sda1
    usbcore: registered new interface driver ums-datafab
    usbcore: registered new interface driver ums-freecom
    usbcore: registered new interface driver ums-isd200
    usbcore: registered new interface driver ums-jumpshot
    usbcore: registered new interface driver ums-karma
    usbcore: registered new interface driver ums-onetouch
    usbcore: registered new interface driver ums-sddr09
    usbcore: registered new interface driver ums-sddr55
    usbcore: registered new interface driver ums-usbat
    sd 2:0:0:0: [sda] Cache data unavailable
    sd 2:0:0:0: [sda] Assuming drive cache: write through
    sd 2:0:0:0: [sda] Attached SCSI disk
    PNP: PS/2 Controller [PNP0303:KBC,PNP0f13:MOUS] at 0x60,0x64 irq 1,12
    serio: i8042 KBD port at 0x60,0x64 irq 1
    serio: i8042 AUX port at 0x60,0x64 irq 12
    mice: PS/2 mouse device common for all mice
    md: linear personality registered for level -1
    md: raid0 personality registered for level 0
    md: raid1 personality registered for level 1
    md: raid10 personality registered for level 10
    md: raid6 personality registered for level 6
    md: raid5 personality registered for level 5
    md: raid4 personality registered for level 4
    EISA: Probing bus 0 at eisa.0
    EISA: Cannot allocate resource for mainboard
    Cannot allocate resource for EISA slot 1
    Cannot allocate resource for EISA slot 2
    input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input0
    Cannot allocate resource for EISA slot 3
    Cannot allocate resource for EISA slot 4
    Cannot allocate resource for EISA slot 5
    Cannot allocate resource for EISA slot 6
    Cannot allocate resource for EISA slot 7
    Cannot allocate resource for EISA slot 8
    EISA: Detected 0 cards.
    cpuidle: using governor ladder
    cpuidle: using governor menu
    usbcore: registered new interface driver hiddev
    usbcore: registered new interface driver usbhid
    usbhid: USB HID core driver
    TCP bic registered
    Initializing XFRM netlink socket
    NET: Registered protocol family 17
    Registering the dns_resolver key type
    Using IPI No-Shortcut mode
    registered taskstats version 1
    drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
    md: Waiting for all devices to be available before autodetect
    md: If you don't use raid, use raid=noautodetect
    md: Autodetecting RAID arrays.
    md: Scanned 0 and added 0 devices.
    md: autorun ...
    md: ... autorun DONE.
    EXT3-fs (sda1): error: couldn't mount because of unsupported optional features (240)
    EXT2-fs (sda1): error: couldn't mount because of unsupported optional features (240)
    EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
    VFS: Mounted root (ext4 filesystem) readonly on device 8:1.
    devtmpfs: mounted
    Freeing unused kernel memory: 504k freed
    systemd[1]: systemd 15 running in system mode. (+PAM -LIBWRAP -AUDIT -SELINUX +SYSVINIT -LIBCRYPTSETUP; frugalware)
    NET: Registered protocol family 10
    lo: Disabled Privacy Extensions
    systemd[1]: Set hostname to <frugalware>.
    systemd[1]: /etc/mtab is not a symlink or not pointing to /proc/self/mounts. This is not supported anymore. Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.
    BUG: unable to handle kernel NULL pointer dereference at 0000001c
    IP: [<c1030ccf>] pick_next_task_fair+0x6f/0x120
    *pde = 00000000
    Oops: 0000 [#1] PREEMPT SMP
    last sysfs file: /sys/devices/pci0000:00/0000:00:10.0/host2/target2:0:0/2:0:0:0/block/sda/sda1/uevent
    Modules linked in: ipv6 autofs4
    Pid: 1386, comm: systemd-sysctl Not tainted 2.6.36-fw3 #1 440BX Desktop Reference Platform/VMware Virtual Platform
    EIP: 0060:[<c1030ccf>] EFLAGS: 00010046 CPU: 0
    EIP is at pick_next_task_fair+0x6f/0x120
    EAX: 00000000 EBX: dfba8180 ECX: dfba85a8 EDX: 00000000
    ESI: 00000000 EDI: 00000000 EBP: c2007bc0 ESP: dfbe3ef0
    DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
    Process systemd-sysctl (pid: 1386, ti=dfbe2000 task=dfa15920 task.ti=dfbe2000)
    Stack:
    dfa15ac8 c2007bc0 00000000 dfa15920 c154849f df02c7b8 00000046 c10e0d92
    <0> 00000046 c15537c0 c17b2bc0 00000000 00000082 c17b2bc0 c17b2bc0 dfa15acc
    <0> c17b2bc0 dfa15920 c17b2bc0 df0328d0 c128d5f0 00000246 00000012 00000001
    Call Trace:
    [<c154849f>] ? schedule+0x44f/0x8c0
    [<c10e0d92>] ? kmem_cache_free+0x82/0xd0
    [<c128d5f0>] ? cic_free_func+0x0/0x70
    [<c103f36b>] ? do_exit+0x4fb/0x770
    [<c103f7ee>] ? do_group_exit+0x2e/0x90
    [<c103f861>] ? sys_exit_group+0x11/0x20
    [<c10034fc>] ? sysenter_do_call+0x12/0x28
    Code: 0f 8e 86 00 00 00 89 fe 8b 43 38 85 c0 74 15 8b 50 34 8b 40 30 89 f9 e8 30 ff ff ff 85 c0 0f 8e 78 00 00 00 89 f0 e8 91 fb ff ff <8b> 7e 1c 85 ff 74 16 8d 7e 08 39 7b 20 0f 84 8e 00 00 00 8d 53
    EIP: [<c1030ccf>] pick_next_task_fair+0x6f/0x120 SS:ESP 0068:dfbe3ef0
    CR2: 000000000000001c
    ---[ end trace 971e729af87f404e ]---
    Fixing recursive fault but reboot is needed![unhandled content-type:application/pgp-signature]
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      Last update: 2010-12-22 01:25    [from the cache]
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