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    SubjectRe: 2.6.{26.2,27-rc} oops on virtualbox
    Em Fri, 22 Aug 2008 12:35:20 -0400
    Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> escreveu:

    | * Luiz Fernando N. Capitulino (lcapitulino@mandriva.com.br) wrote:
    | > Em Fri, 22 Aug 2008 11:34:52 -0400
    | > Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> escreveu:
    | >
    | > | * Luiz Fernando N. Capitulino (lcapitulino@mandriva.com.br) wrote:
    | > | > Em Fri, 22 Aug 2008 08:50:12 +0200
    | > | > Ingo Molnar <mingo@elte.hu> escreveu:
    | > | >
    | > | > |
    | > | > | * H. Peter Anvin <hpa@zytor.com> wrote:
    | > | > |
    | > | > | > H. Peter Anvin wrote:
    | > | > | >>>
    | > | > | >>> Does this look like a kernel bug?
    | > | > | >>>
    | > | > | >>
    | > | > | >> No, it looks like a very common virtualizer bug. Does the attached
    | > | > | >> patch work for you?
    | > | > | >>
    | > | > | >
    | > | > | > Also, in addition to this, please try tip:master. There is a patch in
    | > | > | > tip:master which I hope should fix this problem, but the details are
    | > | > | > important.
    | > | > |
    | > | > | access coordinates would be at:
    | > | > |
    | > | > | http://people.redhat.com/mingo/tip.git/README
    | > | >
    | > | > As I already have Linus tree downloaded I have cloned it in
    | > | > the usual way.
    | > | >
    | > | > Got the same results: OOPS in virtualbox but it works on QEMU.
    | > | >
    | > | > The OOPS's output follows and I have attached the .config I'm using
    | > | > to reproduce the problem.
    | > | >
    | > |
    | > | Can you try booting with the kernel argument :
    | > | debug_alternative
    | > |
    | > | The dmesg of the kernel bootup up to the oops would be helpful.
    | > |
    | > | My guess is that there may be something wrong with irq disabling which
    | > | protects text_poke_early in apply_alternatives().
    | >
    | > I have attached two files:
    | >
    | > - normal.txt: normal boot with no debug options
    | > - debug-alternative.txt ignore_loglevel and debug-alternative boot
    | > options
    | >
    | > I had to pass ignore_loglevel otherwise it wouldn't print
    | > anything.
    | >
    |
    | Ok, now can you try booting with either of those args :
    |
    | noreplace-paravirt
    | noreplace-smp
    |
    | And see which one(s) works ?

    noreplace-paravirt works, the other one causes no change.

    You will find the full boot log (with debug-alternative enabled)
    attached.

    --
    Luiz Fernando N. Capitulino
    Linux version 2.6.27-rc4-test25 (lcapitulino@build1.conectiva) (gcc version 4.3.1 20080626 (prerelease) (GCC) ) #89 SMP Fri Aug 22 12:47:34 BRT 2008
    BIOS-provided physical RAM map:
    BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
    BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
    BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
    BIOS-e820: 0000000000100000 - 0000000007ff0000 (usable)
    BIOS-e820: 0000000007ff0000 - 0000000008000000 (ACPI data)
    BIOS-e820: 00000000fffc0000 - 0000000100000000 (reserved)
    debug: ignoring loglevel setting.
    last_pfn = 0x7ff0 max_arch_pfn = 0x100000
    kernel direct mapping tables up to 7ff0000 @ 7000-d000
    RAMDISK: 07b9b000 - 07fbf89d
    DMI 2.5 present.
    ACPI: RSDP 000E0000, 0024 (r2 VBOX )
    ACPI: XSDT 07FF0030, 002C (r1 VBOX VBOXXSDT 1 ASL 61)
    ACPI: FACP 07FF0060, 00F4 (r4 VBOX VBOXFACP 1 ASL 61)
    ACPI: DSDT 07FF01A0, 1064 (r1 VBOX VBOXBIOS 2 INTL 20080213)
    ACPI: FACS 07FF0160, 0040
    0MB HIGHMEM available.
    127MB LOWMEM available.
    mapped low ram: 0 - 07ff0000
    low ram: 00000000 - 07ff0000
    bootmap 00002000 - 00003000
    (9 early reservations) ==> bootmem [0000000000 - 0007ff0000]
    #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000]
    #1 [0000001000 - 0000002000] EX TRAMPOLINE ==> [0000001000 - 0000002000]
    #2 [0000006000 - 0000007000] TRAMPOLINE ==> [0000006000 - 0000007000]
    #3 [0000100000 - 0000814b10] TEXT DATA BSS ==> [0000100000 - 0000814b10]
    #4 [0007b9b000 - 0007fbf89d] RAMDISK ==> [0007b9b000 - 0007fbf89d]
    #5 [0000815000 - 0000819000] INIT_PG_TABLE ==> [0000815000 - 0000819000]
    #6 [000009fc00 - 0000100000] BIOS reserved ==> [000009fc00 - 0000100000]
    #7 [0000007000 - 0000009000] PGTABLE ==> [0000007000 - 0000009000]
    #8 [0000002000 - 0000003000] BOOTMAP ==> [0000002000 - 0000003000]
    Zone PFN ranges:
    DMA 0x00000000 -> 0x00001000
    Normal 0x00001000 -> 0x00007ff0
    HighMem 0x00007ff0 -> 0x00007ff0
    Movable zone start PFN for each node
    early_node_map[2] active PFN ranges
    0: 0x00000000 -> 0x0000009f
    0: 0x00000100 -> 0x00007ff0
    On node 0 totalpages: 32655
    free_area_init_node: node 0, pgdat c041f600, node_mem_map c1000000
    DMA zone: 3947 pages, LIFO batch:0
    Normal zone: 28292 pages, LIFO batch:7
    ACPI: PM-Timer IO Port: 0x4008
    SMP: Allowing 1 CPUs, 0 hotplug CPUs
    Found and enabled local APIC!
    mapped APIC to ffffb000 (fee00000)
    PM: Registered nosave memory: 000000000009f000 - 00000000000a0000
    PM: Registered nosave memory: 00000000000a0000 - 00000000000f0000
    PM: Registered nosave memory: 00000000000f0000 - 0000000000100000
    Allocating PCI resources starting at 10000000 (gap: 8000000:f7fc0000)
    PERCPU: Allocating 40224 bytes of per cpu data
    NR_CPUS: 32, nr_cpu_ids: 1, nr_node_ids 1
    Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32239
    Kernel command line: initrd=alt0/all.rdz vga=788 splash=silent BOOT_IMAGE=alt0/vmlinuz vga=0 console=ttyS0,9600 console=tty ignore_loglevel debug-alternative noreplace-paravirt
    Enabling fast FPU save and restore... done.
    Enabling unmasked SIMD FPU exception support... done.
    Initializing CPU#0
    PID hash table entries: 512 (order: 9, 2048 bytes)
    TSC calibrated against PM_TIMER
    Detected 2410.580 MHz processor.
    Console: colour VGA+ 80x25
    console [tty0] enabled
    console [ttyS0] enabled
    Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
    ... MAX_LOCKDEP_SUBCLASSES: 8
    ... MAX_LOCK_DEPTH: 48
    ... MAX_LOCKDEP_KEYS: 8191
    ... CLASSHASH_SIZE: 4096
    ... MAX_LOCKDEP_ENTRIES: 8192
    ... MAX_LOCKDEP_CHAINS: 16384
    ... CHAINHASH_SIZE: 8192
    memory used by lock dependency info: 2335 kB
    per task-struct memory footprint: 1152 bytes
    Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
    Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
    Memory: 117088k/131008k available (2340k kernel code, 13364k reserved, 1027k data, 308k init, 0k highmem)
    virtual kernel memory layout:
    fixmap : 0xffe18000 - 0xfffff000 (1948 kB)
    pkmap : 0xff800000 - 0xffc00000 (4096 kB)
    vmalloc : 0xc8800000 - 0xff7fe000 ( 879 MB)
    lowmem : 0xc0000000 - 0xc7ff0000 ( 127 MB)
    .init : 0xc0451000 - 0xc049e000 ( 308 kB)
    .data : 0xc03493b8 - 0xc044a040 (1027 kB)
    .text : 0xc0100000 - 0xc03493b8 (2340 kB)
    Checking if this processor honours the WP bit even in supervisor mode...Ok.
    CPA: page pool initialized 1 of 1 pages preallocated
    SLUB: Genslabs=12, HWalign=128, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
    Calibrating delay loop (skipped), value calculated using timer frequency.. 4821.16 BogoMIPS (lpj=2410580)
    Security Framework initialized
    Mount-cache hash table entries: 512
    CPU: Trace cache: 12K uops, L1 D cache: 16K
    CPU: L2 cache: 1024K
    Intel machine check architecture supported.
    Intel machine check reporting enabled on CPU#0.
    Checking 'hlt' instruction... OK.
    apply_alternatives: alt table c048afa4 -> c048f11f
    SMP alternatives: switching to UP code
    Freeing SMP alternatives: 10k freed
    ACPI: Core revision 20080609
    ACPI: setting ELCR to 0200 (from 0c00)
    weird, boot CPU (#0) not listedby the BIOS.
    SMP motherboard not detected.
    SMP disabled
    Brought up 1 CPUs
    Total of 1 processors activated (4821.16 BogoMIPS).
    CPU0 attaching sched-domain:
    domain 0: span 0 level CPU
    groups: 0
    khelper used greatest stack depth: 6824 bytes left
    net_namespace: 384 bytes
    Booting paravirtualized kernel on bare hardware
    NET: Registered protocol family 16
    ACPI: bus type pci registered
    PCI: PCI BIOS revision 2.10 entry at 0xfadb0, last bus=0
    PCI: Using configuration type 1 for base access
    ACPI: EC: Look up EC in DSDT
    ACPI: Interpreter enabled
    ACPI: (supports S0 S5)
    ACPI: Using PIC for interrupt routing
    ACPI: PCI Root Bridge [PCI0] (0000:00)
    bus 00 -> node 0
    ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
    ACPI: PCI Interrupt Link [LNKA] (IRQs 5 9 10 11) *0, disabled.
    ACPI: PCI Interrupt Link [LNKB] (IRQs 5 9 10 11) *0, disabled.
    ACPI: PCI Interrupt Link [LNKC] (IRQs 5 9 10 *11)
    ACPI: PCI Interrupt Link [LNKD] (IRQs 5 9 *10 11)
    Linux Plug and Play Support v0.97 (c) Adam Belay
    pnp: PnP ACPI init
    ACPI: bus type pnp registered
    pnp: PnP ACPI: found 6 devices
    ACPI: ACPI bus type pnp unregistered
    PnPBIOS: Disabled by ACPI PNP
    PCI: Using ACPI for IRQ routing
    bus: 00 index 0 io port: [0, ffff]
    bus: 00 index 1 mmio: [0, ffffffffffffffff]
    NET: Registered protocol family 2
    IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
    TCP established hash table entries: 4096 (order: 3, 32768 bytes)
    TCP bind hash table entries: 4096 (order: 5, 131072 bytes)
    TCP: Hash tables configured (established 4096 bind 4096)
    TCP reno registered
    NET: Registered protocol family 1
    checking if image is initramfs...<7>Switched to high resolution mode on CPU 0
    it is
    Freeing initrd memory: 4242k freed
    khelper used greatest stack depth: 6640 bytes left
    apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac)
    apm: overridden by ACPI.
    audit: initializing netlink socket (disabled)
    type=2000 audit(1219414726.056:1): initialized
    HugeTLB registered 4 MB page size, pre-allocated 0 pages
    VFS: Disk quotas dquot_6.5.1
    Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
    msgmni has been set to 237
    Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
    io scheduler noop registered
    io scheduler anticipatory registered
    io scheduler deadline registered
    io scheduler cfq registered (default)
    pci 0000:00:00.0: Limiting direct PCI/PCI transfers
    pci 0000:00:01.0: Activating ISA DMA hang workarounds
    pci 0000:00:02.0: Boot video device
    isapnp: Scanning for PnP cards...
    isapnp: No Plug & Play device found
    Serial: 8250/16550 driver4 ports, IRQ sharing enabled
    serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16450
    brd: module loaded
    PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] 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
    input: AT Translated Set 2 keyboard as /class/input/input0
    cpuidle: using governor ladder
    cpuidle: using governor menu
    input: ImExPS/2 Generic Explorer Mouse as /class/input/input1
    TCP cubic registered
    Using IPI No-Shortcut mode
    registered taskstats version 1
    Freeing unused kernel memory: 308k freed
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