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    Subject[BUG] 2.6.30-rc3: BUG triggered on some hugepage usages
    On Tue, Apr 21, 2009 at 08:27:57PM -0700, Linus Torvalds wrote:
    > Another week, another -rc.
    >

    I'm seeing some tests with sysbench+postgres+large pages fail on ppc64
    although a very clear pattern is not forming as to what exactly is
    causing it. However, the libhugetlbfs regression tests (make && make
    func) are triggering the following oops when calling mlock() and so are
    likely related.

    ------------[ cut here ]------------
    kernel BUG at arch/powerpc/mm/pgtable.c:243!
    Oops: Exception in kernel mode, sig: 5 [#1]
    SMP NR_CPUS=128 NUMA pSeries
    Modules linked in: dm_snapshot dm_mirror dm_region_hash dm_log qla2xxx
    loop nfnetlink iptable_filter iptable_nat nf_nat ip_tables
    nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT
    xt_tcpudp xt_limit ipt_LOG xt_pkttype x_tables
    NIP: c00000000002becc LR: c00000000002c02c CTR: 0000000000000000
    REGS: c0000000ea92b4c0 TRAP: 0700 Not tainted (2.6.30-rc3-autokern1)
    MSR: 8000000000029032 <EE,ME,CE,IR,DR> CR: 28000484 XER: 20000020
    TASK = c00000000395b660[7611] 'mlock' THREAD: c0000000ea928000 CPU: 3
    GPR00: 0000000000000001 c0000000ea92b740 c0000000008ea170 c0000000ec7d4980
    GPR04: 000000003f000000 c0000001e2278cf8 0000001900000393 0000000000000001
    GPR08: f000000002bc0000 0000000000000000 0000000000000113 c0000001e2278c81
    GPR12: 0000000044000482 c00000000093b880 0000000028004422 0000000000000000
    GPR16: c0000000ea92bbf0 c0000000009f06f0 0000001900000113 c0000000ec7d4980
    GPR20: 0000000000000000 f000000002bc0000 000000003f000000 c0000001e2278cf8
    GPR24: c0000000eaa90bb0 0000000000000000 c0000000eaa90bb0 c0000000ea928000
    GPR28: f000000002bc0000 0000001900000393 0000000000000001 c0000001e2278cf8
    NIP [c00000000002becc] .assert_pte_locked+0x54/0x8c
    LR [c00000000002c02c] .ptep_set_access_flags+0x50/0x8c
    Call Trace:
    [c0000000ea92b740] [c0000000eaa90bb0] 0xc0000000eaa90bb0 (unreliable)
    [c0000000ea92b7d0] [c0000000000ed1b0] .hugetlb_cow+0xd4/0x654
    [c0000000ea92b900] [c0000000000edbf0] .hugetlb_fault+0x4c0/0x708
    [c0000000ea92b9f0] [c0000000000ee890] .follow_hugetlb_page+0x174/0x364
    [c0000000ea92bae0] [c0000000000d8d30] .__get_user_pages+0x288/0x4c0
    [c0000000ea92bbb0] [c0000000000da10c] .make_pages_present+0xa0/0xe0
    [c0000000ea92bc40] [c0000000000db758] .mlock_fixup+0x90/0x228
    [c0000000ea92bd00] [c0000000000dbb38] .do_mlock+0xc4/0x128
    [c0000000ea92bda0] [c0000000000dbccc] .SyS_mlock+0xb0/0xec
    [c0000000ea92be30] [c00000000000852c] syscall_exit+0x0/0x40
    Instruction dump:
    0b000000 78892662 79291f24 7d69582a 7d600074 7800d182 0b000000 78895e62
    79291f24 7d29582a 7d200074 7800d182 <0b000000> 3c004000 3960ffff
    780007c6
    ---[ end trace 36a7faa04fa9452b ]---

    This corresponds to

    #ifdef CONFIG_DEBUG_VM
    void assert_pte_locked(struct mm_struct *mm, unsigned long addr)
    {
    pgd_t *pgd;
    pud_t *pud;
    pmd_t *pmd;

    if (mm == &init_mm)
    return;
    pgd = mm->pgd + pgd_index(addr);
    BUG_ON(pgd_none(*pgd));
    pud = pud_offset(pgd, addr);
    BUG_ON(pud_none(*pud));
    pmd = pmd_offset(pud, addr);
    BUG_ON(!pmd_present(*pmd)); <----- THIS LINE
    BUG_ON(!spin_is_locked(pte_lockptr(mm, pmd)));
    }
    #endif /* CONFIG_DEBUG_VM */

    This area was last changed by commit 8d30c14cab30d405a05f2aaceda1e9ad57800f36
    in the 2.6.30-rc1 timeframe. I think there was another hugepage-related
    problem with this patch but I can't remember what it was. Full dmesg is


    ==== dmesg ====
    Using pSeries machine description
    Page orders: linear mapping = 24, virtual = 12, io = 12, vmemmap = 24
    Found initrd at 0xc000000003300000:0xc000000004b67000
    console [udbg0] enabled
    Partition configured for 8 cpus.
    CPU maps initialized for 2 threads per core
    (thread shift is 1)
    Starting Linux PPC64 #1 SMP Fri Apr 24 09:08:10 UTC 2009
    -----------------------------------------------------
    ppc64_pft_size = 0x1b
    physicalMemorySize = 0x1e8000000
    htab_hash_mask = 0xfffff
    -----------------------------------------------------
    Initializing cgroup subsys cpuset
    Linux version 2.6.30-rc3-autokern1 (root@elm3a121) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP Fri Apr 24 09:08:10 UTC 2009
    [boot]0012 Setup Arch
    Node 0 Memory: 0x0-0xee000000
    Node 1 Memory: 0xee000000-0x1e8000000
    PCI host bridge /pci@800000020000001 ranges:
    IO 0x000003fe00100000..0x000003fe001fffff -> 0x0000000000000000
    MEM 0x0000040080000000..0x00000400bfffffff -> 0x00000000c0000000
    PCI host bridge /pci@800000020000002 ranges:
    IO 0x000003fe00600000..0x000003fe006fffff -> 0x0000000000000000
    MEM 0x0000040100000000..0x000004017fffffff -> 0x0000000080000000
    PCI host bridge /pci@800000020000003 ranges:
    IO 0x000003fe00300000..0x000003fe003fffff -> 0x0000000000000000
    MEM 0x00000400c0000000..0x00000400ffffffff -> 0x00000000c0000000
    EEH: PCI Enhanced I/O Error Handling Enabled
    PPC64 nvram contains 7168 bytes
    Using dedicated idle loop
    Zone PFN ranges:
    DMA 0x00000000 -> 0x001e8000
    Normal 0x001e8000 -> 0x001e8000
    Movable zone start PFN for each node
    early_node_map[2] active PFN ranges
    0: 0x00000000 -> 0x000ee000
    1: 0x000ee000 -> 0x001e8000
    On node 0 totalpages: 974848
    DMA zone: 13328 pages used for memmap
    DMA zone: 0 pages reserved
    DMA zone: 961520 pages, LIFO batch:31
    On node 1 totalpages: 1024000
    DMA zone: 14000 pages used for memmap
    DMA zone: 0 pages reserved
    DMA zone: 1010000 pages, LIFO batch:31
    [boot]0015 Setup Done
    Built 2 zonelists in Node order, mobility grouping on. Total pages: 1971520
    Policy zone: DMA
    Kernel command line: loglevel=8 autobench_args: root=/dev/sda3 ABAT:1240564260 loglevel=8
    NR_IRQS:512
    [boot]0020 XICS Init
    [boot]0021 XICS Done
    pic: no ISA interrupt controller
    PID hash table entries: 4096 (order: 12, 32768 bytes)
    time_init: decrementer frequency = 238.060000 MHz
    time_init: processor frequency = 1904.480000 MHz
    clocksource: timebase mult[10cd6fc] shift[22] registered
    clockevent: decrementer mult[3cf1] shift[16] cpu[0]
    Console: colour dummy device 80x25
    console handover: boot [udbg0] -> real [hvc0]
    freeing bootmem node 0
    freeing bootmem node 1
    Memory: 7834904k/7995392k available (7808k kernel code, 160488k reserved, 1312k data, 1010k bss, 324k init)
    SLUB: Genslabs=14, HWalign=128, Order=0-3, MinObjects=0, CPUs=8, Nodes=16
    Calibrating delay loop... 475.13 BogoMIPS (lpj=950272)
    Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
    Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
    Mount-cache hash table entries: 256
    Initializing cgroup subsys ns
    Initializing cgroup subsys cpuacct
    irq: irq 2 on host null mapped to virtual irq 16
    clockevent: decrementer mult[3cf1] shift[16] cpu[1]
    Processor 1 found.
    clockevent: decrementer mult[3cf1] shift[16] cpu[2]
    Processor 2 found.
    clockevent: decrementer mult[3cf1] shift[16] cpu[3]
    Processor 3 found.
    clockevent: decrementer mult[3cf1] shift[16] cpu[4]
    Processor 4 found.
    clockevent: decrementer mult[3cf1] shift[16] cpu[5]
    Processor 5 found.
    clockevent: decrementer mult[3cf1] shift[16] cpu[6]
    Processor 6 found.
    clockevent: decrementer mult[3cf1] shift[16] cpu[7]
    Processor 7 found.
    Brought up 8 CPUs
    Node 0 CPUs: 0-3
    Node 1 CPUs: 4-7
    CPU0 attaching sched-domain:
    domain 0: span 0-1 level SIBLING
    groups: 0 1
    domain 1: span 0-3 level CPU
    groups: 0-1 2-3
    domain 2: span 0-7 level NODE
    groups: 0-3 (__cpu_power = 2048) 4-7 (__cpu_power = 2048)
    CPU1 attaching sched-domain:
    domain 0: span 0-1 level SIBLING
    groups: 1 0
    domain 1: span 0-3 level CPU
    groups: 0-1 2-3
    domain 2: span 0-7 level NODE
    groups: 0-3 (__cpu_power = 2048) 4-7 (__cpu_power = 2048)
    CPU2 attaching sched-domain:
    domain 0: span 2-3 level SIBLING
    groups: 2 3
    domain 1: span 0-3 level CPU
    groups: 2-3 0-1
    domain 2: span 0-7 level NODE
    groups: 0-3 (__cpu_power = 2048) 4-7 (__cpu_power = 2048)
    CPU3 attaching sched-domain:
    domain 0: span 2-3 level SIBLING
    groups: 3 2
    domain 1: span 0-3 level CPU
    groups: 2-3 0-1
    domain 2: span 0-7 level NODE
    groups: 0-3 (__cpu_power = 2048) 4-7 (__cpu_power = 2048)
    CPU4 attaching sched-domain:
    domain 0: span 4-5 level SIBLING
    groups: 4 5
    domain 1: span 4-7 level CPU
    groups: 4-5 6-7
    domain 2: span 0-7 level NODE
    groups: 4-7 (__cpu_power = 2048) 0-3 (__cpu_power = 2048)
    CPU5 attaching sched-domain:
    domain 0: span 4-5 level SIBLING
    groups: 5 4
    domain 1: span 4-7 level CPU
    groups: 4-5 6-7
    domain 2: span 0-7 level NODE
    groups: 4-7 (__cpu_power = 2048) 0-3 (__cpu_power = 2048)
    CPU6 attaching sched-domain:
    domain 0: span 6-7 level SIBLING
    groups: 6 7
    domain 1: span 4-7 level CPU
    groups: 6-7 4-5
    domain 2: span 0-7 level NODE
    groups: 4-7 (__cpu_power = 2048) 0-3 (__cpu_power = 2048)
    CPU7 attaching sched-domain:
    domain 0: span 6-7 level SIBLING
    groups: 7 6
    domain 1: span 4-7 level CPU
    groups: 6-7 4-5
    domain 2: span 0-7 level NODE
    groups: 4-7 (__cpu_power = 2048) 0-3 (__cpu_power = 2048)
    net_namespace: 1352 bytes
    NET: Registered protocol family 16
    IBM eBus Device Driver
    PCI: Probing PCI hardware
    IOMMU table initialized, virtual merging enabled
    irq: irq 83 on host null mapped to virtual irq 83
    pci 0000:c8:01.0: supports D1 D2
    pci 0000:c8:01.0: PME# supported from D0 D1 D2 D3hot
    pci 0000:c8:01.0: PME# disabled
    pci 0000:c8:01.1: supports D1 D2
    pci 0000:c8:01.1: PME# supported from D0 D1 D2 D3hot
    pci 0000:c8:01.1: PME# disabled
    pci 0000:c8:01.2: supports D1 D2
    pci 0000:c8:01.2: PME# supported from D0 D1 D2 D3hot
    pci 0000:c8:01.2: PME# disabled
    irq: irq 85 on host null mapped to virtual irq 85
    pci 0000:d0:01.0: PME# supported from D0 D3hot D3cold
    pci 0000:d0:01.0: PME# disabled
    pci 0000:d0:01.1: PME# supported from D0 D3hot D3cold
    pci 0000:d0:01.1: PME# disabled
    irq: irq 87 on host null mapped to virtual irq 87
    irq: irq 88 on host null mapped to virtual irq 88
    pci 0001:c8:01.0: supports D1 D2
    pci 0001:c8:01.0: PME# supported from D0 D1 D2 D3hot
    pci 0001:c8:01.0: PME# disabled
    irq: irq 165 on host null mapped to virtual irq 165
    irq: irq 167 on host null mapped to virtual irq 167
    irq: irq 117 on host null mapped to virtual irq 117
    pci 0002:d0:01.0: supports D1
    irq: irq 119 on host null mapped to virtual irq 119
    irq: irq 115 on host null mapped to virtual irq 115
    PCI: Probing PCI hardware done
    bio: create slab <bio-0> at 0
    SCSI subsystem initialized
    libata version 3.00 loaded.
    usbcore: registered new interface driver usbfs
    usbcore: registered new interface driver hub
    usbcore: registered new device driver usb
    NET: Registered protocol family 2
    Switched to high resolution mode on CPU 0
    Switched to high resolution mode on CPU 1
    Switched to high resolution mode on CPU 2
    Switched to high resolution mode on CPU 3
    Switched to high resolution mode on CPU 4
    Switched to high resolution mode on CPU 5
    Switched to high resolution mode on CPU 6
    Switched to high resolution mode on CPU 7
    IP route cache hash table entries: 262144 (order: 9, 2097152 bytes)
    TCP established hash table entries: 524288 (order: 11, 8388608 bytes)
    TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
    TCP: Hash tables configured (established 524288 bind 65536)
    TCP reno registered
    NET: Registered protocol family 1
    checking if image is initramfs...
    rootfs image is not initramfs (junk in compressed archive); looks like an initrd
    Freeing initrd memory: 24988k freed
    irq: irq 655360 on host null mapped to virtual irq 17
    irq: irq 589825 on host null mapped to virtual irq 18
    RTAS daemon started
    audit: initializing netlink socket (disabled)
    type=2000 audit(1240564423.424:1): initialized
    HugeTLB registered 16 MB page size, pre-allocated 0 pages
    VFS: Disk quotas dquot_6.5.2
    Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
    Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
    msgmni has been set to 15351
    alg: No test for stdrng (krng)
    Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
    io scheduler noop registered
    io scheduler anticipatory registered (default)
    io scheduler deadline registered
    io scheduler cfq registered
    matroxfb: Matrox G450 detected
    PInS data found at offset 31168
    PInS memtype = 5
    matroxfb: 640x480x8bpp (virtual: 640x26214)
    matroxfb: framebuffer at 0x40170000000, mapped to 0xd000080080080000, size 33554432
    Console: switching to colour frame buffer device 80x30
    fb0: MATROX frame buffer device
    matroxfb_crtc2: secondary head of fb0 was registered as fb1
    vio_register_driver: driver hvc_console registering
    HVSI: registered 0 devices
    Generic RTC Driver v1.07
    Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
    brd: module loaded
    Uniform Multi-Platform E-IDE driver
    ide-gd driver 1.18
    ide-cd driver 5.00
    ipr: IBM Power RAID SCSI Device Driver version: 2.4.2 (January 21, 2009)
    ipr 0000:c0:01.0: enabling device (0140 -> 0142)
    ipr 0000:c0:01.0: Found IOA with IRQ: 83
    ipr 0000:c0:01.0: Initializing IOA.
    ipr 0000:c0:01.0: Starting IOA initialization sequence.
    ipr 0000:c0:01.0: Adapter firmware version: 020A004E
    ipr 0000:c0:01.0: IOA initialized.
    scsi0 : IBM 570B Storage Adapter
    scsi 0:0:15:0: Enclosure IBM VSBPD3E U4SCSI 4812 PQ: 0 ANSI: 2
    scsi: unknown device type 31
    scsi 0:255:255:255: No Device IBM 570B001 0150 PQ: 0 ANSI: 0
    ipr 0002:c8:01.0: Found IOA with IRQ: 117
    ipr 0002:c8:01.0: Starting IOA initialization sequence.
    ipr 0002:c8:01.0: Adapter firmware version: 020A004E
    ipr 0002:c8:01.0: IOA initialized.
    scsi1 : IBM 570B Storage Adapter
    scsi 1:0:4:0: Direct-Access IBM H0 HUS103014FL3800 RPQF PQ: 0 ANSI: 4
    scsi 1:0:5:0: Direct-Access IBM ST373453LC C51A PQ: 0 ANSI: 3
    scsi 1:0:15:0: Enclosure IBM VSBPD3E U4SCSI 4812 PQ: 0 ANSI: 2
    scsi: unknown device type 31
    scsi 1:255:255:255: No Device IBM 570B001 0150 PQ: 0 ANSI: 0
    vio_register_driver: driver ibmvscsi registering
    st: Version 20081215, fixed bufsize 32768, s/g segs 256
    Driver 'st' needs updating - please use bus_type methods
    Driver 'sd' needs updating - please use bus_type methods
    Driver 'sr' needs updating - please use bus_type methods
    scsi 0:0:15:0: Attached scsi generic sg0 type 13
    scsi 0:255:255:255: Attached scsi generic sg1 type 31
    sd 1:0:4:0: Attached scsi generic sg2 type 0
    sd 1:0:5:0: Attached scsi generic sg3 type 0
    scsi 1:0:15:0: Attached scsi generic sg4 type 13
    scsi 1:255:255:255: Attached scsi generic sg5 type 31
    Intel(R) PRO/1000 Network Driver - version 7.3.21-k3-NAPI
    Copyright (c) 1999-2006 Intel Corporation.
    e1000 0000:d0:01.0: enabling device (0140 -> 0143)
    sd 1:0:4:0: [sda] 286748000 512-byte hardware sectors: (146 GB/136 GiB)
    sd 1:0:5:0: [sdb] 143374000 512-byte hardware sectors: (73.4 GB/68.3 GiB)
    sd 1:0:5:0: [sdb] Write Protect is off
    sd 1:0:5:0: [sdb] Mode Sense: cb 00 10 08
    sd 1:0:5:0: [sdb] Write cache: disabled, read cache: enabled, supports DPO and FUA
    sdb: sdb1 sdb2 sdb3
    sd 1:0:5:0: [sdb] Attached SCSI disk
    sd 1:0:4:0: [sda] Write Protect is off
    sd 1:0:4:0: [sda] Mode Sense: d3 00 10 08
    sd 1:0:4:0: [sda] Write cache: disabled, read cache: enabled, supports DPO and FUA
    e1000: 0000:d0:01.0: e1000_probe: (PCI-X:133MHz:64-bit) 00:09:6b:dd:0d:9c
    sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 >
    e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network Connection
    e1000 0000:d0:01.1: enabling device (0140 -> 0143)
    sd 1:0:4:0: [sda] Attached SCSI disk
    e1000: 0000:d0:01.1: e1000_probe: (PCI-X:133MHz:64-bit) 00:09:6b:dd:0d:9d
    e1000: eth1: e1000_probe: Intel(R) PRO/1000 Network Connection
    pcnet32.c:v1.35 21.Apr.2008 tsbogend@alpha.franken.de
    e100: Intel(R) PRO/100 Network Driver, 3.5.24-k2-NAPI
    e100: Copyright(c) 1999-2006 Intel Corporation
    drivers/net/ibmveth.c: ibmveth: IBM i/pSeries Virtual Ethernet Driver 1.03
    vio_register_driver: driver ibmveth registering
    console [netcon0] enabled
    netconsole: network logging started
    ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
    ehci_hcd 0000:c8:01.2: enabling device (0140 -> 0142)
    ehci_hcd 0000:c8:01.2: EHCI Host Controller
    ehci_hcd 0000:c8:01.2: new USB bus registered, assigned bus number 1
    ehci_hcd 0000:c8:01.2: Enabling legacy PCI PM
    ehci_hcd 0000:c8:01.2: irq 85, io mem 0x400a0002000
    ehci_hcd 0000:c8:01.2: USB 2.0 started, EHCI 1.00
    usb usb1: configuration #1 chosen from 1 choice
    hub 1-0:1.0: USB hub found
    hub 1-0:1.0: 5 ports detected
    ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
    ohci_hcd 0000:c8:01.0: OHCI Host Controller
    ohci_hcd 0000:c8:01.0: new USB bus registered, assigned bus number 2
    ohci_hcd 0000:c8:01.0: irq 85, io mem 0x400a0001000
    usb usb2: configuration #1 chosen from 1 choice
    hub 2-0:1.0: USB hub found
    hub 2-0:1.0: 3 ports detected
    ohci_hcd 0000:c8:01.1: OHCI Host Controller
    ohci_hcd 0000:c8:01.1: new USB bus registered, assigned bus number 3
    ohci_hcd 0000:c8:01.1: irq 85, io mem 0x400a0000000
    usb usb3: configuration #1 chosen from 1 choice
    hub 3-0:1.0: USB hub found
    hub 3-0:1.0: 2 ports detected
    Initializing USB Mass Storage driver...
    usbcore: registered new interface driver usb-storage
    USB Mass Storage support registered.
    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
    device-mapper: ioctl: 4.14.0-ioctl (2008-04-23) initialised: dm-devel@redhat.com
    oprofile: using ppc64/power5 performance monitoring.
    IPv4 over IPv4 tunneling driver
    TCP cubic registered
    NET: Registered protocol family 17
    RPC: Registered udp transport module.
    RPC: Registered tcp transport module.
    registered taskstats version 1
    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.
    RAMDISK: cramfs filesystem found at block 0
    RAMDISK: Loading 24988KiB [1 disk] into ram disk... done.
    VFS: Mounted root (cramfs filesystem) readonly on device 1:0.
    Freeing unused kernel memory: 324k freed
    nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
    CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use
    nf_conntrack.acct=1 kernel paramater, acct=1 nf_conntrack module option or
    sysctl net.netfilter.nf_conntrack_acct=1 to enable it.
    ip_tables: (C) 2000-2006 Netfilter Core Team
    Netfilter messages via NETLINK v0.30.
    loop: module loaded
    QLogic Fibre Channel HBA Driver: 8.03.01-k1
    qla2xxx 0001:d0:01.0: enabling device (0140 -> 0143)
    qla2xxx 0001:d0:01.0: Found an ISP2300, irq 167, iobase 0xd00008008001a000
    qla2xxx 0001:d0:01.0: Configuring PCI space...
    qla2xxx 0001:d0:01.0: Configure NVRAM parameters...
    qla2xxx 0001:d0:01.0: Verifying loaded RISC code...
    qla2xxx 0001:d0:01.0: firmware: requesting ql2300_fw.bin
    qla2xxx 0001:d0:01.0: Firmware image unavailable.
    qla2xxx 0001:d0:01.0: Firmware images can be retrieved from: ftp://ftp.qlogic.com/outgoing/linux/firmware/.
    qla2xxx 0001:d0:01.0: Failed to initialize adapter
    qla2xxx 0002:c0:01.0: enabling device (0140 -> 0143)
    qla2xxx 0002:c0:01.0: Found an ISP2300, irq 115, iobase 0xd00008008001e000
    qla2xxx 0002:c0:01.0: Configuring PCI space...
    qla2xxx 0002:c0:01.0: Configure NVRAM parameters...
    qla2xxx 0002:c0:01.0: Verifying loaded RISC code...
    qla2xxx 0002:c0:01.0: firmware: requesting ql2300_fw.bin
    qla2xxx 0002:c0:01.0: Firmware image unavailable.
    qla2xxx 0002:c0:01.0: Firmware images can be retrieved from: ftp://ftp.qlogic.com/outgoing/linux/firmware/.
    qla2xxx 0002:c0:01.0: Failed to initialize adapter
    kjournald starting. Commit interval 5 seconds
    EXT3-fs: mounted filesystem with writeback data mode.
    EXT3 FS on sda3, internal journal
    e1000: lan0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
    ------------[ cut here ]------------
    kernel BUG at arch/powerpc/mm/pgtable.c:243!
    Oops: Exception in kernel mode, sig: 5 [#1]
    SMP NR_CPUS=128 NUMA pSeries
    Modules linked in: dm_snapshot dm_mirror dm_region_hash dm_log qla2xxx loop nfnetlink iptable_filter iptable_nat nf_nat ip_tables nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp xt_limit ipt_LOG xt_pkttype x_tables
    NIP: c00000000002becc LR: c00000000002c02c CTR: 0000000000000000
    REGS: c0000000ea92b4c0 TRAP: 0700 Not tainted (2.6.30-rc3-autokern1)
    MSR: 8000000000029032 <EE,ME,CE,IR,DR> CR: 28000484 XER: 20000020
    TASK = c00000000395b660[7611] 'mlock' THREAD: c0000000ea928000 CPU: 3
    GPR00: 0000000000000001 c0000000ea92b740 c0000000008ea170 c0000000ec7d4980
    GPR04: 000000003f000000 c0000001e2278cf8 0000001900000393 0000000000000001
    GPR08: f000000002bc0000 0000000000000000 0000000000000113 c0000001e2278c81
    GPR12: 0000000044000482 c00000000093b880 0000000028004422 0000000000000000
    GPR16: c0000000ea92bbf0 c0000000009f06f0 0000001900000113 c0000000ec7d4980
    GPR20: 0000000000000000 f000000002bc0000 000000003f000000 c0000001e2278cf8
    GPR24: c0000000eaa90bb0 0000000000000000 c0000000eaa90bb0 c0000000ea928000
    GPR28: f000000002bc0000 0000001900000393 0000000000000001 c0000001e2278cf8
    NIP [c00000000002becc] .assert_pte_locked+0x54/0x8c
    LR [c00000000002c02c] .ptep_set_access_flags+0x50/0x8c
    Call Trace:
    [c0000000ea92b740] [c0000000eaa90bb0] 0xc0000000eaa90bb0 (unreliable)
    [c0000000ea92b7d0] [c0000000000ed1b0] .hugetlb_cow+0xd4/0x654
    [c0000000ea92b900] [c0000000000edbf0] .hugetlb_fault+0x4c0/0x708
    [c0000000ea92b9f0] [c0000000000ee890] .follow_hugetlb_page+0x174/0x364
    [c0000000ea92bae0] [c0000000000d8d30] .__get_user_pages+0x288/0x4c0
    [c0000000ea92bbb0] [c0000000000da10c] .make_pages_present+0xa0/0xe0
    [c0000000ea92bc40] [c0000000000db758] .mlock_fixup+0x90/0x228
    [c0000000ea92bd00] [c0000000000dbb38] .do_mlock+0xc4/0x128
    [c0000000ea92bda0] [c0000000000dbccc] .SyS_mlock+0xb0/0xec
    [c0000000ea92be30] [c00000000000852c] syscall_exit+0x0/0x40
    Instruction dump:
    0b000000 78892662 79291f24 7d69582a 7d600074 7800d182 0b000000 78895e62
    79291f24 7d29582a 7d200074 7800d182 <0b000000> 3c004000 3960ffff 780007c6
    ---[ end trace 36a7faa04fa9452b ]---

    --
    Mel Gorman
    Part-time Phd Student Linux Technology Center
    University of Limerick IBM Dublin Software Lab


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