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    SubjectAMD64 Machine hardlocks when using memset
    Hi,


    I do have a very strange problem:

    If I memset a ~1meg buffer some thousand times (in the userspace) it
    will hardlock my machine.

    I've been using 2.6.12-rc1 and also a lot of other kernels (2.6.9,
    2.6.11). I've tried it both using a 32 bit kernel and a 64 bit kernel.
    When running on the 32 bit kernel the machine hardlocks after about
    15000 iterations, on a 64 bit kernel the machine hardlocks after about
    5000 (the 64 bit system has nearly no background jobs running).

    I've been running memcheck for several hours now but nothing did show up.


    I've got an Asus A8N-SLI board with 2 gigs of memory and an AMD 3500+ CPU.

    The 64 bit kernel was compiled using gcc 3.4.3 and the 32 bit kernel
    using 3.3.5.


    This simple programm will kill my machine:

    #include <stdlib.h>
    #include <stdio.h>
    int main(int argc, char *argv[])
    {
    char buf[1024*1024];
    int i;
    for (i=0;i<1024*16;++i)
    {
    printf("%d\n",i);
    memset(buf,0,1024*1024);
    }
    printf("Done\n");
    return 0;
    }

    If I usleep for 1ms after each memset the whole thing will happily run
    forever without any problems.

    Also if I start it twice (without sleeping in the loop) the machine wont
    hardlock either (tested with a 32 bit kernel).

    I'd really appreciate any pointers as to what might be wrong here.

    I've tried both kernels with and without preemption.

    kind regards Philip


    >Bootdata ok (command line is BOOT_IMAGE=test ro root=809)
    Linux version 2.6.12-rc1 (root@localhost) (gcc version 3.4.3 20041125 (Gentoo Linux 3.4.3-r1, ssp-3.4.3-0, pie-8.7.7)) #1 Wed Mar 30 23:30:20 CEST 2005
    BIOS-provided physical RAM map:
    BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
    BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
    BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
    BIOS-e820: 0000000000100000 - 000000007fff0000 (usable)
    BIOS-e820: 000000007fff0000 - 000000007fff3000 (ACPI NVS)
    BIOS-e820: 000000007fff3000 - 0000000080000000 (ACPI data)
    BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
    BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
    BIOS-e820: 00000000fee00000 - 00000000fef00000 (reserved)
    BIOS-e820: 00000000fefffc00 - 00000000ff000000 (reserved)
    BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
    ACPI: RSDP (v000 Nvidia ) @ 0x00000000000f78c0
    ACPI: RSDT (v001 Nvidia AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x000000007fff3040
    ACPI: FADT (v001 Nvidia AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x000000007fff30c0
    ACPI: MCFG (v001 Nvidia AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x000000007fff9540
    ACPI: MADT (v001 Nvidia AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x000000007fff9480
    ACPI: DSDT (v001 NVIDIA AWRDACPI 0x00001000 MSFT 0x0100000e) @ 0x0000000000000000
    On node 0 totalpages: 524272
    DMA zone: 4096 pages, LIFO batch:1
    Normal zone: 520176 pages, LIFO batch:16
    HighMem zone: 0 pages, LIFO batch:1
    Nvidia board detected. Ignoring ACPI timer override.
    ACPI: Local APIC address 0xfee00000
    ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
    Processor #0 15:15 APIC version 16
    ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
    ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
    IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23
    ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
    ACPI: BIOS IRQ0 pin2 override ignored.
    ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
    ACPI: INT_SRC_OVR (bus 0 bus_irq 14 global_irq 14 high edge)
    ACPI: INT_SRC_OVR (bus 0 bus_irq 15 global_irq 15 high edge)
    ACPI: IRQ9 used by override.
    ACPI: IRQ14 used by override.
    ACPI: IRQ15 used by override.
    Setting APIC routing to flat
    Using ACPI (MADT) for SMP configuration information
    Built 1 zonelists
    Kernel command line: BOOT_IMAGE=test ro root=809 console=tty0
    Initializing CPU#0
    PID hash table entries: 4096 (order: 12, 131072 bytes)
    time.c: Using 1.193182 MHz PIT timer.
    time.c: Detected 2211.376 MHz processor.
    Console: colour VGA+ 80x25
    Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)
    Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
    Memory: 2056168k/2097088k available (3281k kernel code, 40236k reserved, 1386k data, 188k init)
    Calibrating delay loop... 4374.52 BogoMIPS (lpj=2187264)
    Mount-cache hash table entries: 256
    CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
    CPU: L2 Cache: 512K (64 bytes/line)
    CPU: AMD Athlon(tm) 64 Processor 3500+ stepping 00
    Using local APIC NMI watchdog using perfctr0
    Using local APIC timer interrupts.
    Detected 12.564 MHz APIC timer.
    NET: Registered protocol family 16
    PCI: Using configuration type 1
    mtrr: v2.0 (20020519)
    ACPI: Subsystem revision 20050211
    ACPI: Interpreter enabled
    ACPI: Using IOAPIC for interrupt routing
    ACPI: PCI Root Bridge [PCI0] (00:00)
    PCI: Probing PCI hardware (bus 00)
    PCI: Transparent bridge - 0000:00:09.0
    ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
    ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.HUB0._PRT]
    ACPI: PCI Interrupt Link [LNK1] (IRQs 3 4 5 7 9 10 11 *12 14 15)
    ACPI: PCI Interrupt Link [LNK2] (IRQs 3 4 5 7 9 10 11 12 14 15) *0, disabled.
    ACPI: PCI Interrupt Link [LNK3] (IRQs 3 4 *5 7 9 10 11 12 14 15)
    ACPI: PCI Interrupt Link [LNK4] (IRQs 3 4 5 7 9 10 11 12 14 15) *0, disabled.
    ACPI: PCI Interrupt Link [LNK5] (IRQs 3 4 5 7 9 10 11 12 14 15) *0, disabled.
    ACPI: PCI Interrupt Link [LUBA] (IRQs 3 4 *5 7 9 10 11 12 14 15)
    ACPI: PCI Interrupt Link [LUBB] (IRQs 3 4 5 7 9 10 11 12 14 15) *0, disabled.
    ACPI: PCI Interrupt Link [LMAC] (IRQs 3 4 5 7 9 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [LACI] (IRQs *3 4 5 7 9 10 11 12 14 15)
    ACPI: PCI Interrupt Link [LMCI] (IRQs 3 4 5 7 9 10 11 12 14 15) *0, disabled.
    ACPI: PCI Interrupt Link [LSMB] (IRQs 3 4 5 7 9 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [LUB2] (IRQs *3 4 5 7 9 10 11 12 14 15)
    ACPI: PCI Interrupt Link [LIDE] (IRQs 3 4 5 7 9 10 11 12 14 15) *0, disabled.
    ACPI: PCI Interrupt Link [LSID] (IRQs 3 4 5 7 9 10 *11 12 14 15)
    ACPI: PCI Interrupt Link [LFID] (IRQs 3 4 5 7 9 10 11 *12 14 15)
    ACPI: PCI Interrupt Link [LPCA] (IRQs 3 4 5 7 9 10 11 12 14 15) *0, disabled.
    ACPI: PCI Interrupt Link [APC1] (IRQs *16), disabled.
    ACPI: PCI Interrupt Link [APC2] (IRQs *17), disabled.
    ACPI: PCI Interrupt Link [APC3] (IRQs *18), disabled.
    ACPI: PCI Interrupt Link [APC4] (IRQs *19), disabled.
    ACPI: PCI Interrupt Link [APC5] (IRQs *16), disabled.
    ACPI: PCI Interrupt Link [APCF] (IRQs 20 21 22 23) *0, disabled.
    ACPI: PCI Interrupt Link [APCG] (IRQs 20 21 22 23) *0, disabled.
    ACPI: PCI Interrupt Link [APCH] (IRQs 20 21 22 23) *0, disabled.
    ACPI: PCI Interrupt Link [APCJ] (IRQs 20 21 22 23) *0, disabled.
    ACPI: PCI Interrupt Link [APCK] (IRQs 20 21 22 23) *0, disabled.
    ACPI: PCI Interrupt Link [APCS] (IRQs 20 21 22 23) *0, disabled.
    ACPI: PCI Interrupt Link [APCL] (IRQs 20 21 22 23) *0, disabled.
    ACPI: PCI Interrupt Link [APCZ] (IRQs 20 21 22 23) *0, disabled.
    ACPI: PCI Interrupt Link [APSI] (IRQs 20 21 22 23) *0, disabled.
    ACPI: PCI Interrupt Link [APSJ] (IRQs 20 21 22 23) *0, disabled.
    ACPI: PCI Interrupt Link [APCP] (IRQs 20 21 22 23) *0, disabled.
    SCSI subsystem initialized
    usbcore: registered new driver usbfs
    usbcore: registered new driver hub
    PCI: Using ACPI for IRQ routing
    PCI: If a device doesn't work, try "pci=routeirq". If it helps, post a report
    TC classifier action (bugs to netdev@oss.sgi.com cc hadi@cyberus.ca)
    IA32 emulation $Id: sys_ia32.c,v 1.32 2002/03/24 13:02:28 ak Exp $
    Total HugeTLB memory allocated, 0
    devfs: 2004-01-31 Richard Gooch (rgooch@atnf.csiro.au)
    devfs: boot_options: 0x0
    JFS: nTxBlock = 8192, nTxLock = 65536
    SGI XFS with ACLs, large block/inode numbers, no debug enabled
    Initializing Cryptographic API
    pci_hotplug: PCI Hot Plug PCI Core version: 0.5
    acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.4
    ACPI: Power Button (FF) [PWRF]
    ACPI: Fan [FAN] (on)
    ACPI: Processor [CPU0] (supports 8 throttling states)
    ACPI: Thermal Zone [THRM] (40 C)
    Real Time Clock Driver v1.12
    Non-volatile memory driver v1.2
    [drm] Initialized drm 1.0.0 20040925
    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 disabled
    ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
    ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
    io scheduler noop registered
    io scheduler anticipatory registered
    io scheduler deadline registered
    io scheduler cfq registered
    RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
    loop: loaded (max 8 devices)
    forcedeth.c: Reverse Engineered nForce ethernet driver. Version 0.31.
    ACPI: PCI Interrupt Link [APCH] enabled at IRQ 23
    ACPI: PCI interrupt 0000:00:0a.0[A] -> GSI 23 (level, low) -> IRQ 23
    PCI: Setting latency timer of device 0000:00:0a.0 to 64
    eth0: forcedeth.c: subsystem: 01043:8141 bound to 0000:00:0a.0
    Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
    ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
    NFORCE-CK804: IDE controller at PCI slot 0000:00:06.0
    NFORCE-CK804: chipset revision 162
    NFORCE-CK804: not 100% native mode: will probe irqs later
    NFORCE-CK804: BIOS didn't set cable bits correctly. Enabling workaround.
    NFORCE-CK804: 0000:00:06.0 (rev a2) UDMA133 controller
    ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:DMA, hdd:DMA
    Probing IDE interface ide0...
    hda: PIONEER DVD-RW DVR-109, ATAPI CD/DVD-ROM drive
    hdb: PHILIPS DROM5016L, ATAPI CD/DVD-ROM drive
    ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
    Probing IDE interface ide1...
    Probing IDE interface ide1...
    Probing IDE interface ide2...
    Probing IDE interface ide3...
    Probing IDE interface ide4...
    Probing IDE interface ide5...
    hda: ATAPI 40X DVD-ROM DVD-R CD-R/RW drive, 2000kB Cache, UDMA(66)
    Uniform CD-ROM driver Revision: 3.20
    hdb: ATAPI 48X DVD-ROM drive, 512kB Cache, UDMA(33)
    libata version 1.10 loaded.
    sata_nv version 0.6
    ACPI: PCI Interrupt Link [APSI] enabled at IRQ 22
    ACPI: PCI interrupt 0000:00:07.0[A] -> GSI 22 (level, low) -> IRQ 22
    PCI: Setting latency timer of device 0000:00:07.0 to 64
    ata1: SATA max UDMA/133 cmd 0x9F0 ctl 0xBF2 bmdma 0xD800 irq 22
    ata2: SATA max UDMA/133 cmd 0x970 ctl 0xB72 bmdma 0xD808 irq 22
    ata1: no device found (phy stat 00000000)
    scsi0 : sata_nv
    ata2: no device found (phy stat 00000000)
    scsi1 : sata_nv
    ACPI: PCI Interrupt Link [APSJ] enabled at IRQ 21
    ACPI: PCI interrupt 0000:00:08.0[A] -> GSI 21 (level, low) -> IRQ 21
    PCI: Setting latency timer of device 0000:00:08.0 to 64
    ata3: SATA max UDMA/133 cmd 0x9E0 ctl 0xBE2 bmdma 0xC400 irq 21
    ata4: SATA max UDMA/133 cmd 0x960 ctl 0xB62 bmdma 0xC408 irq 21
    ata3: dev 0 cfg 49:2f00 82:7c6b 83:7f09 84:4063 85:7c68 86:3e01 87:4063 88:407f
    ata3: dev 0 ATA, max UDMA/133, 398297088 sectors: lba48
    nv_sata: Primary device added
    nv_sata: Primary device removed
    nv_sata: Secondary device added
    nv_sata: Secondary device removed
    ata3: dev 0 configured for UDMA/133
    scsi2 : sata_nv
    ata4: no device found (phy stat 00000000)
    scsi3 : sata_nv
    Vendor: ATA Model: Maxtor 6B200M0 Rev: BANC
    Type: Direct-Access ANSI SCSI revision: 05
    SCSI device sda: 398297088 512-byte hdwr sectors (203928 MB)
    SCSI device sda: drive cache: write back
    SCSI device sda: 398297088 512-byte hdwr sectors (203928 MB)
    SCSI device sda: drive cache: write back
    /dev/scsi/host2/bus0/target0/lun0: p1 p2 < p5 p6 p7 p8 p9 p10 >
    Attached scsi disk sda at scsi2, channel 0, id 0, lun 0
    Attached scsi generic sg0 at scsi2, channel 0, id 0, lun 0, type 0
    usbmon: debugs is not available
    mice: PS/2 mouse device common for all mice
    md: linear personality registered as nr 1
    md: raid0 personality registered as nr 2
    md: raid1 personality registered as nr 3
    md: raid5 personality registered as nr 4
    raid5: automatically using best checksumming function: generic_sse
    generic_sse: 6776.000 MB/sec
    raid5: using function: generic_sse (6776.000 MB/sec)
    raid6: int64x1 2042 MB/s
    raid6: int64x2 2949 MB/s
    raid6: int64x4 2886 MB/s
    raid6: int64x8 1921 MB/s
    raid6: sse2x1 906 MB/s
    raid6: sse2x2 1773 MB/s
    raid6: sse2x4 3062 MB/s
    raid6: using algorithm sse2x4 (3062 MB/s)
    md: raid6 personality registered as nr 8
    md: multipath personality registered as nr 7
    md: md driver 0.90.1 MAX_MD_DEVS=256, MD_SB_DISKS=27
    device-mapper: 4.4.0-ioctl (2005-01-12) initialised: dm-devel@redhat.com
    Advanced Linux Sound Architecture Driver Version 1.0.8 (Thu Jan 13 09:39:32 2005 UTC).
    ALSA device list:
    No soundcards found.
    NET: Registered protocol family 2
    IP: routing cache hash table of 16384 buckets, 128Kbytes
    TCP established hash table entries: 524288 (order: 10, 4194304 bytes)
    TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
    TCP: Hash tables configured (established 524288 bind 65536)
    NET: Registered protocol family 1
    NET: Registered protocol family 10
    Disabled Privacy Extensions on device ffffffff80538620(lo)
    IPv6 over IPv4 tunneling driver
    NET: Registered protocol family 17
    NET: Registered protocol family 15
    powernow-k8: Found 1 AMD Athlon 64 / Opteron processors (version 1.00.09e)
    powernow-k8: 0 : fid 0xe (2200 MHz), vid 0x6 (1400 mV)
    powernow-k8: 1 : fid 0xc (2000 MHz), vid 0x8 (1350 mV)
    powernow-k8: 2 : fid 0xa (1800 MHz), vid 0xa (1300 mV)
    powernow-k8: 3 : fid 0x2 (1000 MHz), vid 0x12 (1100 mV)
    cpu_init done, current fid 0xe, vid 0x6
    ACPI wakeup devices:
    HUB0 XVR0 XVR1 XVR2 XVR3 USB0 USB2 MMAC MMCI UAR1
    ACPI: (supports S0 S1 S3 S4 S5)
    BIOS EDD facility v0.16 2004-Jun-25, 1 devices found
    devfs_mk_dev: could not append to parent for md/0
    md: Autodetecting RAID arrays.
    md: autorun ...
    md: ... autorun DONE.
    kjournald starting. Commit interval 5 seconds
    EXT3-fs: mounted filesystem with ordered data mode.
    VFS: Mounted root (ext3 filesystem) readonly.
    Freeing unused kernel memory: 188k freed
    input: AT Translated Set 2 keyboard on isa0060/serio0
    Adding 1959888k swap on /dev/sda6. Priority:-1 extents:1
    EXT3 FS on sda9, internal journal
    kjournald starting. Commit interval 5 seconds
    EXT3 FS on sda8, internal journal
    EXT3-fs: mounted filesystem with ordered data mode.
    i2c_adapter i2c-0: nForce2 SMBus adapter at 0x4c00
    i2c_adapter i2c-1: nForce2 SMBus adapter at 0x4c40
    ohci_hcd: 2004 Nov 08 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI)
    ACPI: PCI Interrupt Link [APCF] enabled at IRQ 20
    ACPI: PCI interrupt 0000:00:02.0[A] -> GSI 20 (level, low) -> IRQ 20
    PCI: Setting latency timer of device 0000:00:02.0 to 64
    ohci_hcd 0000:00:02.0: nVidia Corporation CK804 USB Controller
    ohci_hcd 0000:00:02.0: new USB bus registered, assigned bus number 1
    ohci_hcd 0000:00:02.0: irq 20, io mem 0xd0104000
    hub 1-0:1.0: USB hub found
    hub 1-0:1.0: 10 ports detected
    ACPI: PCI Interrupt Link [APCL] enabled at IRQ 23
    ACPI: PCI interrupt 0000:00:02.1[B] -> GSI 23 (level, low) -> IRQ 23
    PCI: Setting latency timer of device 0000:00:02.1 to 64
    ehci_hcd 0000:00:02.1: nVidia Corporation CK804 USB Controller
    ehci_hcd 0000:00:02.1: new USB bus registered, assigned bus number 2
    ehci_hcd 0000:00:02.1: irq 23, io mem 0xd0105000
    PCI: cache line size of 64 is not supported by device 0000:00:02.1
    ehci_hcd 0000:00:02.1: park 0
    ehci_hcd 0000:00:02.1: USB 2.0 initialized, EHCI 1.00, driver 10 Dec 2004
    hub 2-0:1.0: USB hub found
    hub 2-0:1.0: 10 ports detected
    ACPI: PCI Interrupt Link [APCJ] enabled at IRQ 22
    ACPI: PCI interrupt 0000:00:04.0[A] -> GSI 22 (level, low) -> IRQ 22
    PCI: Setting latency timer of device 0000:00:04.0 to 64
    intel8x0_measure_ac97_clock: measured 49642 usecs
    intel8x0: clocking to 46875
    usb 1-1: new full speed USB device using ohci_hcd and address 3
    usb 1-2: new low speed USB device using ohci_hcd and address 4
    usb 1-10: new full speed USB device using ohci_hcd and address 5
    cdc_acm 1-1:1.0: ttyACM0: USB ACM device
    usbcore: registered new driver cdc_acm
    drivers/usb/class/cdc-acm.c: v0.23:USB Abstract Control Model driver for USB modems and ISDN adapters
    usbcore: registered new driver hiddev
    input: USB HID v1.10 Mouse [B16_b_02 USB-PS/2 Optical Mouse] on usb-0000:00:02.0-2
    usbcore: registered new driver usbhid
    drivers/usb/input/hid-core.c: v2.01:USB HID core driver
    Bluetooth: Core ver 2.7
    NET: Registered protocol family 31
    Bluetooth: HCI device and connection manager initialized
    Bluetooth: HCI socket layer initialized
    Bluetooth: HCI USB driver ver 2.8
    usbcore: registered new driver hci_usb
    ieee1394: Initialized config rom entry `ip1394'
    ohci1394: $Rev: 1250 $ Ben Collins <bcollins@debian.org>
    ACPI: PCI Interrupt Link [APC1] enabled at IRQ 16
    ACPI: PCI interrupt 0000:05:0b.0[A] -> GSI 16 (level, low) -> IRQ 16
    ohci1394: fw-host0: OHCI-1394 1.1 (PCI): IRQ=[16] MMIO=[d0004000-d00047ff] Max Packet=[2048]
    USB Universal Host Controller Interface driver v2.2
    ieee1394: Host added: ID:BUS[0-00:1023] GUID[0011d800000a00cc]
    eth1394: $Rev: 1247 $ Ben Collins <bcollins@debian.org>
    eth1394: eth1: IEEE-1394 IPv4 over 1394 Ethernet (fw-host0)
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