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    SubjectBUG at mm/memory.c:1501 in 2.6.0-test5
    Hi,
    yesterday night I shut down VMware virtual machine. About 20 seconds
    after that I decided to close VMware UI, and bad thing happened - VMware's
    window was partially obscuring xterm, and when I closed UI, only
    upper half of VMware window disappeared, until place where xterm window
    ended. Bottom half of window was left here, and X server died.

    +========+
    | |
    +===| | +=====+
    |xte| VMware | => |xterm|
    +---| | +-----+------+
    | | | |
    +--------+ +--------+

    Investigation revealed that X server got killed as shown below (unfortunately
    stack trace is a bit suspicious - couple of stale entries is printed due
    to quality of gcc 3 in eliminating unused local variables & aligning stack
    to 16byte boundaries), with page_file() being set for some page whose
    vma->vm_ops was NULL (vma->vm_ops == edx, vma == esi in dump below).

    Today I spent over 8 hours trying to find what wrong could VMware do
    to the system and/or XFree, but as I was not able to explain it,
    I think that I'll ask here. Maybe someone else will know how this could
    happen. Only thing I know is that system was under big memory pressure
    while VM was running, and that VMware I used uses fadvise(WILL_NEED)
    with approx 128kB buffers before issuing actual pread(). But as this
    happened in completely different process, it should not matter.

    Kernel is UP with all debugging enabled, DRI disabled, i8042 debugging
    enabled. System is old 1G Athlon, A7V, 512MB RAM. MCE check is printed
    since we stopped setting bank 0 in -test3 or -test4, and I already
    reported this on L-K, with no conclusion.
    Thanks,
    Petr Vandrovec
    vandrove@vc.cvut.cz



    drivers/input/serio/i8042.c: 00 <- i8042 (interrupt, aux, 12) [3664659]
    drivers/input/serio/i8042.c: 08 <- i8042 (interrupt, aux, 12) [3664666]
    drivers/input/serio/i8042.c: 00 <- i8042 (interrupt, aux, 12) [3664667]
    drivers/input/serio/i8042.c: 01 <- i8042 (interrupt, aux, 12) [3664668]
    drivers/input/serio/i8042.c: 00 <- i8042 (interrupt, aux, 12) [3664669]
    drivers/input/serio/i8042.c: 18 <- i8042 (interrupt, aux, 12) [3664676]
    drivers/input/serio/i8042.c: ff <- i8042 (interrupt, aux, 12) [3664677]
    drivers/input/serio/i8042.c: 01 <- i8042 (interrupt, aux, 12) [3664678]
    drivers/input/serio/i8042.c: 00 <- i8042 (interrupt, aux, 12) [3664679]
    ------------[ cut here ]------------
    kernel BUG at mm/memory.c:1501!
    invalid operand: 0000 [#1]
    CPU: 0
    EIP: 0060:[<c015be10>] Tainted: PF
    EFLAGS: 00013246
    EIP is at do_file_page+0x170/0x180
    eax: da54d3fc ebx: db8938e4 ecx: daf0a404 edx: 00000000
    esi: db35ce14 edi: 00000001 ebp: 404ffdf0 esp: daee1eb4
    ds: 007b es: 007b ss: 0068
    Process XFree86 (pid: 1456, threadinfo=daee0000 task=daf168e0)
    Stack: c016e9bb daee1ecc 087de788 00001000 00000000 00000000 db8938e4 daf0a404
    404ffdf0 00000001 c015bef6 db8938e4 db35ce14 404ffdf0 00000001 da54d3fc
    daf0a404 daf168e0 db8938e4 db893904 db35ce14 daf168e0 c011da9c db8938e4
    Call Trace:
    [<c016e9bb>] do_sync_read+0x8b/0xc0 <<stale
    [<c015bef6>] handle_mm_fault+0xd6/0x2c0
    [<c011da9c>] do_page_fault+0x13c/0x46e [152 byte stack]
    [<c013008b>] update_wall_time+0xb/0x40 <<stale
    [<c013071f>] do_timer+0xdf/0xf0 <<stale
    [<c01121ab>] timer_interrupt+0x14b/0x360 <<stale
    [<c010c7c5>] do_IRQ+0x205/0x360 <<stale
    [<c012713f>] profile_hook+0x1f/0x23 <<stale
    [<c011d960>] do_page_fault+0x0/0x46e <<%edi pushed by do_page_fault prolog
    [<c010a775>] error_code+0x2d/0x38

    Code: 0f 0b dd 05 0b 5e 38 c0 e9 c3 fe ff ff 8d 76 00 55 b8 00 e0
    mm/mmap.c:1369: spin_lock(kernel/fork.c:db893928) already locked by mm/memory.c/1600
    drivers/input/serio/i8042.c: 08 <- i8042 (interrupt, aux, 12) [3664865]
    drivers/input/serio/i8042.c: 00 <- i8042 (interrupt, aux, 12) [3664866]
    drivers/input/serio/i8042.c: 01 <- i8042 (interrupt, aux, 12) [3664867]
    drivers/input/serio/i8042.c: 00 <- i8042 (interrupt, aux, 12) [3664868]
    drivers/input/serio/i8042.c: 18 <- i8042 (interrupt, aux, 12) [3664875]
    drivers/input/serio/i8042.c: ff <- i8042 (interrupt, aux, 12) [3664876]
    drivers/input/serio/i8042.c: 01 <- i8042 (interrupt, aux, 12) [3664877]
    drivers/input/serio/i8042.c: 00 <- i8042 (interrupt, aux, 12) [3664879]
    drivers/input/serio/i8042.c: 18 <- i8042 (interrupt, aux, 12) [3664885]



    Linux version 2.6.0-test5-c1315 (root@ppc) (gcc version 3.3.2 20030908 (Debian prerelease)) #3 Sun Sep 14 04:02:54 CEST 2003
    Video mode to be used for restore is f00
    BIOS-provided physical RAM map:
    BIOS-e820: 0000000000000000 - 000000000009e800 (usable)
    BIOS-e820: 000000000009e800 - 00000000000a0000 (reserved)
    BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
    BIOS-e820: 0000000000100000 - 000000001ffec000 (usable)
    BIOS-e820: 000000001ffec000 - 000000001ffef000 (ACPI data)
    BIOS-e820: 000000001ffef000 - 000000001ffff000 (reserved)
    BIOS-e820: 000000001ffff000 - 0000000020000000 (ACPI NVS)
    BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
    511MB LOWMEM available.
    On node 0 totalpages: 131052
    DMA zone: 4096 pages, LIFO batch:1
    Normal zone: 126956 pages, LIFO batch:16
    HighMem zone: 0 pages, LIFO batch:1
    DMI 2.3 present.
    ACPI: RSDP (v000 ASUS ) @ 0x000f6a90
    ACPI: RSDT (v001 ASUS A7V 0x30303031 MSFT 0x31313031) @ 0x1ffec000
    ACPI: FADT (v001 ASUS A7V 0x30303031 MSFT 0x31313031) @ 0x1ffec080
    ACPI: BOOT (v001 ASUS A7V 0x30303031 MSFT 0x31313031) @ 0x1ffec040
    ACPI: DSDT (v001 ASUS A7V 0x00001000 MSFT 0x0100000b) @ 0x00000000
    ACPI: MADT not present
    Building zonelist for node : 0
    Kernel command line: BOOT_IMAGE=Linux ro root=2107 video=matrox:vesa:0x117,fv:85 video=matroxfb:vesa:0x117,fv:85 nmi_watchdog=1 devfs=nomount
    Local APIC disabled by BIOS -- reenabling.
    Found and enabled local APIC!
    Initializing CPU#0
    PID hash table entries: 2048 (order 11: 16384 bytes)
    Detected 1009.472 MHz processor.
    Console: colour VGA+ 80x25
    Memory: 514356k/524208k available (2444k kernel code, 9064k reserved, 715k data, 356k init, 0k highmem)
    Calibrating delay loop... 1986.56 BogoMIPS
    Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
    Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
    Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
    CPU: After generic identify, caps: 0183fbff c1c7fbff 00000000 00000000
    CPU: After vendor identify, caps: 0183fbff c1c7fbff 00000000 00000000
    CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
    CPU: L2 Cache: 256K (64 bytes/line)
    CPU: After all inits, caps: 0183fbff c1c7fbff 00000000 00000020
    Intel machine check architecture supported.
    Intel machine check reporting enabled on CPU#0.
    CPU: AMD Athlon(tm) Processor stepping 02
    Enabling fast FPU save and restore... done.
    Checking 'hlt' instruction... OK.
    POSIX conformance testing by UNIFIX
    enabled ExtINT on CPU#0
    ESR value before enabling vector: 00000000
    ESR value after enabling vector: 00000000
    testing NMI watchdog ... OK.
    Using local APIC timer interrupts.
    calibrating APIC timer ...
    ..... CPU clock speed is 1008.0834 MHz.
    ..... host bus clock speed is 201.0766 MHz.
    NET: Registered protocol family 16
    PCI: PCI BIOS revision 2.10 entry at 0xf1180, last bus=1
    PCI: Using configuration type 1
    mtrr: v2.0 (20020519)
    ACPI: Subsystem revision 20030813
    spurious 8259A interrupt: IRQ7.
    ACPI: Interpreter enabled
    ACPI: Using PIC for interrupt routing
    ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 9 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 9 *10 11 12 14 15)
    ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 *5 6 7 9 10 11 12 14 15)
    ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 *9 10 11 12 14 15)
    ACPI: PCI Root Bridge [PCI0] (00:00)
    PCI: Probing PCI hardware (bus 00)
    ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
    drivers/usb/core/usb.c: registered new driver usbfs
    drivers/usb/core/usb.c: registered new driver hub
    ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 9
    ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 5
    ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 10
    ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 11
    PCI: Using ACPI for IRQ routing
    PCI: if you experience problems, try using option 'pci=noacpi' or even 'acpi=off'
    matroxfb: Matrox G450 detected
    matroxfb: MTRR's turned on
    matroxfb: 1024x768x16bpp (virtual: 1024x8190)
    matroxfb: framebuffer at 0xCE000000, mapped to 0xe080f000, size 33554432
    Console: switching to colour frame buffer device 128x48
    fb0: MATROX frame buffer device
    pty: 256 Unix98 ptys configured
    SBF: Simple Boot Flag extension found and enabled.
    SBF: Setting boot flags 0x1
    Machine check exception polling timer started.
    IA-32 Microcode Update Driver: v1.11 <tigran@veritas.com>
    ikconfig 0.6 with /proc/config*
    devfs: v1.22 (20021013) Richard Gooch (rgooch@atnf.csiro.au)
    devfs: boot_options: 0x0
    Initializing Cryptographic API
    PCI: Disabling Via external APIC routing
    ACPI: Power Button (FF) [PWRF]
    ACPI: Processor [CPU0] (supports C1 C2, 16 throttling states)
    Real Time Clock Driver v1.12
    Non-volatile memory driver v1.2
    Serial: 8250/16550 driver $Revision: 1.90 $ IRQ sharing disabled
    ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
    ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
    parport0: PC-style at 0x378 (0x778) [PCSPP,TRISTATE]
    parport0: cpp_daisy: aa5500ff(38)
    parport0: assign_addrs: aa5500ff(38)
    parport0: cpp_daisy: aa5500ff(38)
    parport0: assign_addrs: aa5500ff(38)
    parport_pc: Via 686A parallel port: io=0x378
    Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
    ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
    VP_IDE: IDE controller at PCI slot 0000:00:04.1
    VP_IDE: chipset revision 16
    VP_IDE: not 100% native mode: will probe irqs later
    ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
    VP_IDE: VIA vt82c686a (rev 22) IDE UDMA66 controller on pci0000:00:04.1
    ide0: BM-DMA at 0xd800-0xd807, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xd808-0xd80f, BIOS settings: hdc:pio, hdd:pio
    hda: PLEXTOR CD-R PX-W2410A, ATAPI CD/DVD-ROM drive
    Using anticipatory scheduling io scheduler
    ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
    PDC20265: IDE controller at PCI slot 0000:00:11.0
    PDC20265: chipset revision 2
    PDC20265: 100% native mode on irq 10
    PDC20265: (U)DMA Burst Bit ENABLED Primary PCI Mode Secondary PCI Mode.
    ide2: BM-DMA at 0x8400-0x8407, BIOS settings: hde:pio, hdf:pio
    ide3: BM-DMA at 0x8408-0x840f, BIOS settings: hdg:pio, hdh:pio
    hde: ST3160023A, ATA DISK drive
    ide2 at 0x9800-0x9807,0x9402 on irq 10
    hdh: WDC WD1200BB-00CAA1, ATA DISK drive
    ide3 at 0x9000-0x9007,0x8802 on irq 10
    hde: max request size: 1024KiB
    hde: 312581808 sectors (160041 MB) w/8192KiB Cache, CHS=19457/255/63, UDMA(100)
    /dev/ide/host2/bus0/target0/lun0: p1 p2 < p5 p6 p7 >
    hdh: max request size: 128KiB
    hdh: 234441648 sectors (120034 MB) w/2048KiB Cache, CHS=65535/16/63, UDMA(100)
    /dev/ide/host2/bus1/target1/lun0: p1 p2 < p5 p6 >
    hda: ATAPI 40X CD-ROM CD-R/RW drive, 4096kB Cache, UDMA(33)
    Uniform CD-ROM driver Revision: 3.12
    matroxfb_crtc2: secondary head of fb0 was registered as fb1
    drivers/usb/host/uhci-hcd.c: USB Universal Host Controller Interface driver v2.1
    uhci-hcd 0000:00:04.2: UHCI Host Controller
    uhci-hcd 0000:00:04.2: irq 9, io base 0000d400
    uhci-hcd 0000:00:04.2: new USB bus registered, assigned bus number 1
    hub 1-0:0: USB hub found
    hub 1-0:0: 2 ports detected
    uhci-hcd 0000:00:04.3: UHCI Host Controller
    uhci-hcd 0000:00:04.3: irq 9, io base 0000d000
    uhci-hcd 0000:00:04.3: new USB bus registered, assigned bus number 2
    hub 2-0:0: USB hub found
    hub 2-0:0: 2 ports detected
    mice: PS/2 mouse device common for all mice
    input: PC Speaker
    drivers/input/serio/i8042.c: 20 -> i8042 (command) [0]
    drivers/input/serio/i8042.c: 47 <- i8042 (return) [0]
    drivers/input/serio/i8042.c: 60 -> i8042 (command) [0]
    drivers/input/serio/i8042.c: 56 -> i8042 (parameter) [0]
    ...
    drivers/input/serio/i8042.c: 41 <- i8042 (interrupt, kbd, 1) [190]
    drivers/input/serio/i8042.c: f4 -> i8042 (kbd-data) [190]
    drivers/input/serio/i8042.c: fa <- i8042 (interrupt, kbd, 1) [194]
    input: AT Set 2 keyboard on isa0060/serio0
    serio: i8042 KBD port at 0x60,0x64 irq 1
    i2c /dev entries driver module version 2.7.0 (20021208)
    oprofile: using NMI interrupt.
    NET: Registered protocol family 2
    IP: routing cache hash table of 1024 buckets, 32Kbytes
    TCP: Hash tables configured (established 32768 bind 9362)
    Initializing IPsec netlink socket
    NET: Registered protocol family 1
    NET: Registered protocol family 17
    NET: Registered protocol family 15
    BIOS EDD facility v0.09 2003-Jan-22, 2 devices found
    VFS: Mounted root (ext2 filesystem) readonly.
    Freeing unused kernel memory: 356k freed
    hub 2-0:0: debounce: port 2: delay 100ms stable 4 status 0x101
    hub 2-0:0: new USB device on port 2, assigned address 2
    hub 2-2:0: USB hub found
    hub 2-2:0: 4 ports detected
    Adding 1959888k swap on /dev/hde6. Priority:-1 extents:1
    NTFS driver 2.1.4 [Flags: R/O MODULE].
    NTFS volume version 3.1.
    ne2k-pci.c:v1.02 10/19/2000 D. Becker/P. Gortmaker
    http://www.scyld.com/network/ne2k-pci.html
    eth0: RealTek RTL-8029 found at 0xa000, IRQ 10, 00:C0:26:30:B0:2D.
    MCE: The hardware reports a non fatal, correctable incident occurred on CPU 0.
    Bank 0: f65980000000baff
    -
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