Message-Id: <20080207122652.02a7d5d5.akpm@linux-foundation.org>
Date:	Thu, 7 Feb 2008 12:26:52 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Chris Rankin <rankincj@...oo.com>
Cc:	lenb@...nel.org, rankincj@...oo.com, linux-kernel@...r.kernel.org,
	mingo@...e.hu, tglx@...utronix.de, linux-acpi@...r.kernel.org
Subject: Re: [BUG] 2.6.24 refuses to boot - NMI watchdog problem?

On Thu, 7 Feb 2008 19:58:10 +0000 (GMT)
Chris Rankin <rankincj@...oo.com> wrote:

> --- Andrew Morton <akpm@...ux-foundation.org> wrote:
> > It isn't clear (to me) where in this mess we disabled interrupts around the
> > set_cpus_allowed().  Chris, if this is repeatable it would be helpful to
> > set CONFIG_FRAME_POINTER=y which hopefully will get us a cleaner trace,
> 
> Here you go,
> 

Thanks.

> 
> Linux version 2.6.24 (chris@...pit.underworld) (gcc version 4.1.2 20070925 (Red Hat 4.1.2-33)) #1
> SMP PREEMPT Thu Feb 7 00:01:40 GMT 2008

So it's a CONFIG_SMP=y kernel on a single-cpu machine?

> BIOS-provided physical RAM map:
>  BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
>  BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
>  BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
>  BIOS-e820: 0000000000100000 - 000000001ffeb000 (usable)
>  BIOS-e820: 000000001ffeb000 - 000000001ffef000 (ACPI data)
>  BIOS-e820: 000000001ffef000 - 000000001ffff000 (reserved)
>  BIOS-e820: 000000001ffff000 - 0000000020000000 (ACPI NVS)
>  BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
>  BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
>  BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved)
> 511MB LOWMEM available.
> Zone PFN ranges:
>   DMA             0 ->     4096
>   Normal       4096 ->   131051
> Movable zone start PFN for each node
> early_node_map[1] active PFN ranges
>     0:        0 ->   131051
> DMI 2.3 present.
> ACPI: RSDP 000F7B40, 0014 (r0 ASUS  )
> ACPI: RSDT 1FFEB000, 0030 (r1 ASUS   TUSL2-C  30303031 MSFT 31313031)
> ACPI: FACP 1FFEB100, 0074 (r1 ASUS   TUSL2-C  30303031 MSFT 31313031)
> ACPI: DSDT 1FFEB180, 39FA (r1   ASUS TUSL2-C      1000 MSFT  100000B)
> ACPI: FACS 1FFFF000, 0040
> ACPI: BOOT 1FFEB040, 0028 (r1 ASUS   TUSL2-C  30303031 MSFT 31313031)
> ACPI: APIC 1FFEB080, 005A (r1 ASUS   TUSL2-C  30303031 MSFT 31313031)
> ACPI: PM-Timer IO Port: 0xe408
> ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
> Processor #0 6:8 APIC version 17
> 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 32, address 0xfec00000, GSI 0-23
> ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl edge)
> ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 20 low level)
> Enabling APIC mode:  Logical Cluster.  Using 1 I/O APICs, target cpus f
> Using ACPI (MADT) for SMP configuration information
> Allocating PCI resources starting at 30000000 (gap: 20000000:dec00000)
> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130028
> Kernel command line: ro root=LABEL=/ nmi_watchdog=1 video=matroxfb:vesa:0x11A
> console=ttyS0,115200n8 console=tty0
> Enabling fast FPU save and restore... done.
> Enabling unmasked SIMD FPU exception support... done.
> Initializing CPU#0
> CPU 0 irqstacks, hard=c035f000 soft=c035b000
> PID hash table entries: 2048 (order: 11, 8192 bytes)
> Detected 1005.086 MHz processor.
> Console: colour VGA+ 80x25
> console [tty0] enabled
> console [ttyS0] enabled
> Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
> Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
> Memory: 513484k/524204k available (1577k kernel code, 10128k reserved, 608k data, 196k init, 0k
> highmem)
> virtual kernel memory layout:
>     fixmap  : 0xfffb5000 - 0xfffff000   ( 296 kB)
>     vmalloc : 0xe0800000 - 0xfffb3000   ( 503 MB)
>     lowmem  : 0xc0000000 - 0xdffeb000   ( 511 MB)
>       .init : 0xc0327000 - 0xc0358000   ( 196 kB)
>       .data : 0xc028a722 - 0xc03227c4   ( 608 kB)
>       .text : 0xc0100000 - 0xc028a722   (1577 kB)
> Checking if this processor honours the WP bit even in supervisor mode... Ok.
> SLUB: Genslabs=11, HWalign=32, Order=0-1, MinObjects=4, CPUs=1, Nodes=1
> Calibrating delay using timer specific routine.. 2011.89 BogoMIPS (lpj=4023782)
> Mount-cache hash table entries: 512
> CPU: L1 I cache: 16K, L1 D cache: 16K
> CPU: L2 cache: 256K
> Intel machine check architecture supported.
> Intel machine check reporting enabled on CPU#0.
> Compat vDSO mapped to ffffe000.
> Checking 'hlt' instruction... OK.
> SMP alternatives: switching to UP code
> Freeing SMP alternatives: 9k freed
> ACPI: Core revision 20070126
> CPU0: Intel Pentium III (Coppermine) stepping 06
> Leaving ESR disabled.
> Total of 1 processors activated (2011.89 BogoMIPS).
> ENABLING IO-APIC IRQs
> ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1
> WARNING: at arch/x86/kernel/smp_32.c:561 native_smp_call_function_mask()
> Pid: 1, comm: swapper Not tainted 2.6.24 #1
>  [<c0105020>] show_trace_log_lvl+0x1a/0x2f
>  [<c0105990>] show_trace+0x12/0x14
>  [<c010613d>] dump_stack+0x6c/0x72
>  [<c0113ab5>] native_smp_call_function_mask+0x44/0x102
>  [<c0114cc5>] smp_call_function+0x1e/0x22
>  [<c0125bb0>] on_each_cpu+0x2a/0x57
>  [<c01170f2>] setup_nmi+0x33/0x4a
>  [<c0332a22>] setup_IO_APIC+0x929/0xf11
>  [<c0330178>] native_smp_prepare_cpus+0x487/0x497
>  [<c03273de>] kernel_init+0x54/0x2c3
>  [<c0104c83>] kernel_thread_helper+0x7/0x10
>  =======================

I'm in a twisty maze of kernel versions, all different.  Looks like we're
calling setup_nmi() under local_irq_disable() somewhere but I got lost
chasing it down.  We can wait for the code to stabilise a bit I guess -
it's harmless at this stage in bootup.

> APIC timer registered as dummy, due to nmi_watchdog=1!

hm, I wonder if this is significant.

> Brought up 1 CPUs
> net_namespace: 64 bytes
> NET: Registered protocol family 16
> ACPI: bus type pci registered
> PCI: PCI BIOS revision 2.10 entry at 0xf0e30, last bus=3
> PCI: Using configuration type 1
> Setting up standard PCI resources
> ACPI: Interpreter enabled
> ACPI: (supports S0 S1 S5)
> ACPI: Using IOAPIC for interrupt routing
> ACPI: PCI Root Bridge [PCI0] (0000:00)
> PCI quirk: region e400-e47f claimed by ICH4 ACPI/GPIO/TCO
> PCI quirk: region ec00-ec3f claimed by ICH4 GPIO
> PCI: Transparent bridge - 0000:00:1e.0
> 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 Interrupt Link [LNKE] (IRQs 3 4 5 6 7 *9 10 11 12 14 15)
> ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 *9 10 11 12 14 15)
> ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 *9 10 11 12 14 15)
> ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 *9 10 11 12 14 15)
> Linux Plug and Play Support v0.97 (c) Adam Belay
> pnp: PnP ACPI init
> ACPI: bus type pnp registered
> pnp: PnP ACPI: found 15 devices
> ACPI: ACPI bus type pnp unregistered
> PCI: Using ACPI for IRQ routing
> PCI: If a device doesn't work, try "pci=routeirq".  If it helps, post a report

It is unclear to me what clocksource (if any) your machine is using.

> BUG: NMI Watchdog detected LOCKUP on CPU0, eip c0102b07, registers:
> Modules linked in:
> 
> Pid: 0, comm: swapper Not tainted (2.6.24 #1)
> EIP: 0060:[<c0102b07>] EFLAGS: 00000246 CPU: 0
> EIP is at default_idle+0x2f/0x43
> EAX: 00000000 EBX: c0102ad8 ECX: 010b2000 EDX: fffedb3c
> ESI: 00000000 EDI: c1409284 EBP: c0323fb4 ESP: c0323fb4
>  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
> Process swapper (pid: 0, ti=c0323000 task=c02fc320 task.ti=c0323000)
> Stack: c0323fc4 c01025af c140c000 c0357284 c0323fcc c0287305 c0323ff8 c032792f 
>        00000037 c0327108 00000000 00000004 00009000 c0343b00 00000002 00099800 
>        c0319000 007ab007 00000000 
> Call Trace:
>  [<c0105020>] show_trace_log_lvl+0x1a/0x2f
>  [<c01050d2>] show_stack_log_lvl+0x9d/0xa5
>  [<c010517d>] show_registers+0xa3/0x1df
>  [<c0105ba7>] die_nmi+0x81/0xd2
>  [<c0115d72>] nmi_watchdog_tick+0xd5/0x12a
>  [<c0105f19>] do_nmi+0x93/0x24b
>  [<c0289adb>] nmi_stack_correct+0x26/0x2b
>  [<c01025af>] cpu_idle+0x9a/0xcf
>  [<c0287305>] rest_init+0x5d/0x5f
>  [<c032792f>] start_kernel+0x2e2/0x2ea
>  [<00000000>] _stext+0x3feff000/0x19
>  =======================
> Code: 36 c0 00 55 89 e5 75 33 80 3d e5 17 32 c0 00 74 2a 89 e0 25 00 f0 ff ff 83 60 0c fd f0 83 04
> 24 00 fa 8b 40 08 a8 04 75 04 fb f4 <eb> 01 fb 89 e0 25 00 f0 ff ff 83 48 0c 02 eb 02 f3 90 5d c3
> 55 

And I assume this happened because you just aren't getting any clock ticks.
akpm.poke(x86 guys);
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