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    SubjectRe: Hang on x86-64, 2.6.9-rc3-bk4
    Andrew Morton wrote:
    > Jeff Garzik <jgarzik@pobox.com> wrote:
    >
    >>>I'd be suspecting the vmscan.c change, but we allegedly fixed that later on.
    >>
    >> > Can you try reverting it? (Can't reproduce the problem here)
    >>
    >>
    >> Verified -- reverting the vmscan.c changeset (attached) fixed my hang.
    >
    >
    > Can we get a sysrq-M dump from that machine please?

    alas, for the 'hang' case, my during-initscripts console is going to
    strange place. here's sysrq-m from 2.6.9-rc3-bk4 with the mm/vmscan.c
    patch reverted (the its-fixed version).

    Jeff


    Bootdata ok (command line is ro root=/dev/sda2 nogui)
    Linux version 2.6.9-rc3-bk4-test1 (jgarzik@bum.yyz.us) (gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7)) #2 Sat Oct 16 19:31:35 EDT 2004
    BIOS-provided physical RAM map:
    BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
    BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
    BIOS-e820: 00000000000d8000 - 00000000000e2000 (reserved)
    BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
    BIOS-e820: 0000000000100000 - 000000001fff0000 (usable)
    BIOS-e820: 000000001fff0000 - 000000001fff8000 (ACPI data)
    BIOS-e820: 000000001fff8000 - 0000000020000000 (ACPI NVS)
    BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
    BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
    BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved)
    No mptable found.
    On node 0 totalpages: 131056
    DMA zone: 4096 pages, LIFO batch:1
    Normal zone: 126960 pages, LIFO batch:16
    HighMem zone: 0 pages, LIFO batch:1
    ACPI: RSDP (v000 AMI ) @ 0x00000000000fa3f0
    ACPI: RSDT (v001 AMIINT VIA_K8 0x00000010 MSFT 0x00000097) @ 0x000000001fff0000
    ACPI: FADT (v001 AMIINT VIA_K8 0x00000011 MSFT 0x00000097) @ 0x000000001fff0030
    ACPI: MADT (v001 AMIINT VIA_K8 0x00000009 MSFT 0x00000097) @ 0x000000001fff00c0
    ACPI: DSDT (v001 VIA VIA_K8 0x00001000 MSFT 0x0100000d) @ 0x0000000000000000
    ACPI: Local APIC address 0xfee00000
    ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
    Processor #0 15:4 APIC version 16
    ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
    IOAPIC[0]: apic_id 2, version 3, address 0xfec00000, GSI 0-23
    ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
    ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
    ACPI: IRQ0 used by override.
    ACPI: IRQ2 used by override.
    ACPI: IRQ9 used by override.
    Using ACPI (MADT) for SMP configuration information
    Checking aperture...
    CPU 0: aperture @ d0000000 size 256 MB
    Built 1 zonelists
    Kernel command line: ro root=/dev/sda2 nogui console=tty0
    Initializing CPU#0
    PID hash table entries: 2048 (order: 11, 65536 bytes)
    time.c: Using 1.193182 MHz PIT timer.
    time.c: Detected 2000.136 MHz processor.
    Console: colour VGA+ 80x25
    Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
    Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
    Memory: 510660k/524224k available (2458k kernel code, 12808k reserved, 974k data, 148k init)
    Calibrating delay loop... 3940.35 BogoMIPS (lpj=1970176)
    Mount-cache hash table entries: 256 (order: 0, 4096 bytes)
    CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
    CPU: L2 Cache: 1024K (64 bytes/line)
    CPU: AMD Athlon(tm) 64 Processor 3200+ stepping 08
    Using local APIC NMI watchdog using perfctr0
    Using local APIC timer interrupts.
    Detected 12.500 MHz APIC timer.
    NET: Registered protocol family 16
    PCI: Using configuration type 1
    mtrr: v2.0 (20020519)
    ACPI: Subsystem revision 20040715
    ACPI: Interpreter enabled
    ACPI: Using IOAPIC for interrupt routing
    ACPI: PCI Root Bridge [PCI0] (00:00)
    PCI: Probing PCI hardware (bus 00)
    ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
    ACPI: Power Resource [URP1] (off)
    ACPI: Power Resource [URP2] (off)
    ACPI: Power Resource [FDDP] (off)
    ACPI: Power Resource [LPTP] (off)
    ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 *10 11 12 14 15)
    ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 10 11 12 14 *15)
    ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 *5 6 7 10 11 12 14 15)
    ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled.
    ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled.
    ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled.
    ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 10 11 12 14 15) *0, disabled.
    SCSI subsystem initialized
    usbcore: registered new driver usbfs
    usbcore: registered new driver hub
    PCI: Using ACPI for IRQ routing
    ACPI: PCI interrupt 0000:00:0b.0[A] -> GSI 16 (level, low) -> IRQ 169
    ACPI: PCI interrupt 0000:00:0d.0[A] -> GSI 17 (level, low) -> IRQ 177
    ACPI: PCI interrupt 0000:00:0f.0[B] -> GSI 20 (level, low) -> IRQ 185
    ACPI: PCI interrupt 0000:00:10.0[A] -> GSI 21 (level, low) -> IRQ 193
    ACPI: PCI interrupt 0000:00:10.1[A] -> GSI 21 (level, low) -> IRQ 193
    ACPI: PCI interrupt 0000:00:10.2[B] -> GSI 21 (level, low) -> IRQ 193
    ACPI: PCI interrupt 0000:00:10.3[B] -> GSI 21 (level, low) -> IRQ 193
    ACPI: PCI interrupt 0000:00:10.4[C] -> GSI 21 (level, low) -> IRQ 193
    ACPI: PCI interrupt 0000:00:11.5[C] -> GSI 22 (level, low) -> IRQ 201
    ACPI: PCI interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 169
    agpgart: Detected AGP bridge 0
    agpgart: Maximum main memory to use for agp memory: 439M
    agpgart: AGP aperture is 256M @ 0xd0000000
    PCI-DMA: Disabling IOMMU.
    IA32 emulation $Id: sys_ia32.c,v 1.32 2002/03/24 13:02:28 ak Exp $
    Initializing Cryptographic API
    PCI: Via IRQ fixup for 0000:00:10.0, from 11 to 1
    PCI: Via IRQ fixup for 0000:00:10.1, from 11 to 1
    PCI: Via IRQ fixup for 0000:00:10.2, from 10 to 1
    PCI: Via IRQ fixup for 0000:00:10.3, from 10 to 1
    ACPI: Power Button (FF) [PWRF]
    ACPI: Sleep Button (CM) [SLPB]
    ACPI: Processor [CPU1] (supports C1)
    Real Time Clock Driver v1.12
    Linux agpgart interface v0.100 (c) Dave Jones
    serio: i8042 AUX port at 0x60,0x64 irq 12
    serio: i8042 KBD port at 0x60,0x64 irq 1
    Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing enabled
    ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
    Using anticipatory io scheduler
    Floppy drive(s): fd0 is 1.44M
    FDC 0 is a post-1991 82077
    RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
    Universal TUN/TAP device driver 1.5 (C)1999-2002 Maxim Krasnyansky
    Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
    ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
    libata version 1.02 loaded.
    sata_promise version 1.00
    ACPI: PCI interrupt 0000:00:0d.0[A] -> GSI 17 (level, low) -> IRQ 177
    ata1: SATA max UDMA/133 cmd 0xFFFFFF000000E200 ctl 0xFFFFFF000000E238 bmdma 0x0 irq 177
    ata2: SATA max UDMA/133 cmd 0xFFFFFF000000E280 ctl 0xFFFFFF000000E2B8 bmdma 0x0 irq 177
    ata1: no device found (phy stat 00000000)
    scsi0 : sata_promise
    ata2: dev 0 cfg 49:2f00 82:3469 83:7f21 84:4003 85:3469 86:3e01 87:4003 88:203f
    ata2: dev 0 ATA, max UDMA/100, 234375000 sectors: lba48
    ata2: dev 0 configured for UDMA/100
    scsi1 : sata_promise
    Vendor: ATA Model: WDC WD1200JD-75F Rev: 02.0
    Type: Direct-Access ANSI SCSI revision: 05
    sata_via version 0.20
    ACPI: PCI interrupt 0000:00:0f.0[B] -> GSI 20 (level, low) -> IRQ 185
    sata_via(0000:00:0f.0): routed to hard irq line 10
    ata3: SATA max UDMA/133 cmd 0xDC00 ctl 0xD802 bmdma 0xCC00 irq 185
    ata4: SATA max UDMA/133 cmd 0xD400 ctl 0xD002 bmdma 0xCC08 irq 185
    ata3: dev 0 cfg 49:2f00 82:7c6b 83:7f09 84:4003 85:7c69 86:3e01 87:4003 88:407f
    ata3: dev 0 ATA, max UDMA/133, 398297088 sectors: lba48
    ata3: dev 0 configured for UDMA/133
    scsi2 : sata_via
    ata4: no device found (phy stat 00000000)
    scsi3 : sata_via
    Vendor: ATA Model: Maxtor 6Y200M0 Rev: YAR5
    Type: Direct-Access ANSI SCSI revision: 05
    SCSI device sda: 234375000 512-byte hdwr sectors (120000 MB)
    SCSI device sda: drive cache: write back
    sda: sda1 sda2 sda3 sda4 < sda5 sda6 >
    Attached scsi disk sda at scsi1, channel 0, id 0, lun 0
    SCSI device sdb: 398297088 512-byte hdwr sectors (203928 MB)
    SCSI device sdb: drive cache: write back
    sdb: sdb1
    Attached scsi disk sdb at scsi2, channel 0, id 0, lun 0
    Attached scsi generic sg0 at scsi1, channel 0, id 0, lun 0, type 0
    Attached scsi generic sg1 at scsi2, channel 0, id 0, lun 0, type 0
    ACPI: PCI interrupt 0000:00:10.4[C] -> GSI 21 (level, low) -> IRQ 193
    ehci_hcd 0000:00:10.4: EHCI Host Controller
    ehci_hcd 0000:00:10.4: irq 193, pci mem ffffff0000010d00
    ehci_hcd 0000:00:10.4: new USB bus registered, assigned bus number 1
    ehci_hcd 0000:00:10.4: USB 2.0 enabled, EHCI 1.00, driver 2004-May-10
    hub 1-0:1.0: USB hub found
    hub 1-0:1.0: 8 ports detected
    USB Universal Host Controller Interface driver v2.2
    ACPI: PCI interrupt 0000:00:10.0[A] -> GSI 21 (level, low) -> IRQ 193
    uhci_hcd 0000:00:10.0: UHCI Host Controller
    uhci_hcd 0000:00:10.0: irq 193, io base 000000000000b800
    uhci_hcd 0000:00:10.0: new USB bus registered, assigned bus number 2
    hub 2-0:1.0: USB hub found
    hub 2-0:1.0: 2 ports detected
    ACPI: PCI interrupt 0000:00:10.1[A] -> GSI 21 (level, low) -> IRQ 193
    uhci_hcd 0000:00:10.1: UHCI Host Controller
    uhci_hcd 0000:00:10.1: irq 193, io base 000000000000bc00
    uhci_hcd 0000:00:10.1: new USB bus registered, assigned bus number 3
    hub 3-0:1.0: USB hub found
    hub 3-0:1.0: 2 ports detected
    ACPI: PCI interrupt 0000:00:10.2[B] -> GSI 21 (level, low) -> IRQ 193
    uhci_hcd 0000:00:10.2: UHCI Host Controller
    uhci_hcd 0000:00:10.2: irq 193, io base 000000000000c000
    uhci_hcd 0000:00:10.2: new USB bus registered, assigned bus number 4
    hub 4-0:1.0: USB hub found
    hub 4-0:1.0: 2 ports detected
    ACPI: PCI interrupt 0000:00:10.3[B] -> GSI 21 (level, low) -> IRQ 193
    uhci_hcd 0000:00:10.3: UHCI Host Controller
    uhci_hcd 0000:00:10.3: irq 193, io base 000000000000c400
    uhci_hcd 0000:00:10.3: new USB bus registered, assigned bus number 5
    hub 5-0:1.0: USB hub found
    hub 5-0:1.0: 2 ports detected
    Initializing USB Mass Storage driver...
    usbcore: registered new driver usb-storage
    USB Mass Storage support registered.
    usbcore: registered new driver usbhid
    drivers/usb/input/hid-core.c: v2.0:USB HID core driver
    mice: PS/2 mouse device common for all mice
    input: AT Translated Set 2 keyboard on isa0060/serio0
    input: ImPS/2 Generic Wheel Mouse on isa0060/serio1
    input: PC Speaker
    NET: Registered protocol family 26
    NET: Registered protocol family 2
    IP: routing cache hash table of 4096 buckets, 32Kbytes
    TCP: Hash tables configured (established 32768 bind 32768)
    Initializing IPsec netlink socket
    NET: Registered protocol family 1
    NET: Registered protocol family 10
    IPv6 over IPv4 tunneling driver
    NET: Registered protocol family 17
    NET: Registered protocol family 15
    BIOS EDD facility v0.16 2004-Jun-25, 4 devices found
    kjournald starting. Commit interval 5 seconds
    EXT3-fs: mounted filesystem with ordered data mode.
    VFS: Mounted root (ext3 filesystem) readonly.
    Freeing unused kernel memory: 148k freed
    EXT3 FS on sda2, internal journal
    Adding 2048276k swap on /dev/sda3. Priority:-1 extents:1
    SysRq : Show Memory
    Mem-info:
    DMA per-cpu:
    cpu 0 hot: low 2, high 6, batch 1
    cpu 0 cold: low 0, high 2, batch 1
    Normal per-cpu:
    cpu 0 hot: low 32, high 96, batch 16
    cpu 0 cold: low 0, high 32, batch 16
    HighMem per-cpu: empty

    Free pages: 2264kB (0kB HighMem)
    Active:31606 inactive:78376 dirty:12 writeback:0 unstable:0 free:566 slab:16353 mapped:31544 pagetables:121
    DMA free:80kB min:20kB low:40kB high:60kB active:0kB inactive:0kB present:16384kB
    protections[]: 0 0 0
    Normal free:2184kB min:700kB low:1400kB high:2100kB active:126424kB inactive:313504kB present:507840kB
    protections[]: 0 0 0
    HighMem free:0kB min:128kB low:256kB high:384kB active:0kB inactive:0kB present:0kB
    protections[]: 0 0 0
    DMA: 10*4kB 1*8kB 0*16kB 1*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 80kB
    Normal: 8*4kB 31*8kB 11*16kB 10*32kB 4*64kB 1*128kB 0*256kB 0*512kB 1*1024kB 0*2048kB 0*4096kB = 2184kB
    HighMem: empty
    Swap cache: add 1976, delete 1938, find 120/152, race 0+0
    Free swap: 2041740kB
    131056 pages of RAM
    3391 reserved pages
    79434 pages shared
    38 pages swap cached
    kjournald starting. Commit interval 5 seconds
    EXT3 FS on sda6, internal journal
    EXT3-fs: mounted filesystem with ordered data mode.
    kjournald starting. Commit interval 5 seconds
    EXT3 FS on sdb1, internal journal
    EXT3-fs: mounted filesystem with ordered data mode.
    kjournald starting. Commit interval 5 seconds
    EXT3 FS on sda5, internal journal
    EXT3-fs: mounted filesystem with ordered data mode.
    ip_tables: (C) 2000-2002 Netfilter core team
    Disabled Privacy Extensions on device ffffffff803f8100(lo)
    r8169 Gigabit Ethernet driver 1.2 loaded
    ACPI: PCI interrupt 0000:00:0b.0[A] -> GSI 16 (level, low) -> IRQ 169
    r8169: NAPI enabled
    eth0: Identified chip type is 'RTL8169s/8110s'.
    eth0: RTL8169 at 0xffffff0000012f00, 00:0c:76:51:67:7c, IRQ 169
    ip_tables: (C) 2000-2002 Netfilter core team
    r8169: eth0: link up
    ip_tables: (C) 2000-2002 Netfilter core team
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