linux-kernel - Re: [BUG] 2.6.26-rc5-mm1- kernel BUG at arch/x86/kernel/io_apic

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Date:	Tue, 10 Jun 2008 17:53:55 +0530
From:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	linux-kernel@...r.kernel.org, apw@...dowen.org,
	linux-pci@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [BUG] 2.6.26-rc5-mm1- kernel BUG at arch/x86/kernel/io_apic_64.c:355!

Andrew Morton wrote:
> On Mon, 09 Jun 2008 23:01:36 +0530
> Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com> wrote:
> 
>> Hi Andrew,
>>
>> The 2.6.26-rc5-mm1 kernel panics while bootup on 32 way, x86_64 machine.
>> passing noapic as the command line parameter, boots up
>> the machine fine.
>>
>> kernel BUG at arch/x86/kernel/io_apic_64.c:355!
>> invalid opcode: 0000 [1] SMP 
>> last sysfs file: 
>> CPU 24 
>> Modules linked in:
>> Pid: 1, comm: swapper Not tainted 2.6.26-rc5-mm1-autotest #1
>> RIP: 0010:[<ffffffff8021b9da>]  [<ffffffff8021b9da>] add_pin_to_irq+0x7a/0x90
>> RSP: 0018:ffff81061e4cbb60  EFLAGS: 00010216
>> RAX: 00000000000000f0 RBX: 00000000000000f0 RCX: 0000000000000001
>> RDX: 0000000000000018 RSI: 0000000000000006 RDI: 00000000000000f0
>> RBP: 0000000000000006 R08: 0000000000000018 R09: 0000000000000006
>> R10: 0000000000000008 R11: ffffffff803948e6 R12: 0000000000000001
>> R13: 0000000000000001 R14: 0000000000000018 R15: ffff81061e4cbc04
>> FS:  0000000000000000(0000) GS:ffff810bfe7be5c0(0000) knlGS:0000000000000000
>> CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
>> CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000006e0
>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
>> Process swapper (pid: 1, threadinfo ffff81061e4ca000, task ffff81032e4b96d0)
>> Stack:  0000000000000006 ffffffff8021ba6e 00000000000000f0 0000000000000001
>>  0000000000000000 0000000000000000 ffff81061e4cbc00 ffffffff80218991
>>  00000000000000f0 0000000000000000 0000000000000001 ffffffff80218a1a
>> Call Trace:
>>  [<ffffffff8021ba6e>] io_apic_set_pci_routing+0x7e/0xb0
>>  [<ffffffff80218991>] mp_register_gsi+0xb1/0xd0
>>  [<ffffffff80218a1a>] acpi_register_gsi+0x6a/0x70
>>  [<ffffffff80394b20>] acpi_pci_irq_enable+0x14f/0x220
>>  [<ffffffff803948e6>] acpi_pci_allocate_irq+0x0/0x4c
>>  [<ffffffff8036e14a>] do_pci_enable_device+0x4a/0x70
>>  [<ffffffff8036e1c1>] __pci_enable_device_flags+0x51/0x60
>>  [<ffffffff804f1608>] tg3_init_one+0x58/0x1640
>>  [<ffffffff80229790>] default_wake_function+0x0/0x10
>>  [<ffffffff8022e942>] set_cpus_allowed_ptr+0xc2/0xf0
>>  [<ffffffff803703b7>] pci_device_probe+0xe7/0x130
>>  [<ffffffff803c38b6>] driver_probe_device+0x96/0x1a0
>>  [<ffffffff803c3a49>] __driver_attach+0x89/0x90
>>  [<ffffffff803c39c0>] __driver_attach+0x0/0x90
>>  [<ffffffff803c2dbd>] bus_for_each_dev+0x4d/0x80
>>  [<ffffffff8028f708>] kmem_cache_alloc+0xc8/0xf0
>>  [<ffffffff803c341e>] bus_add_driver+0xae/0x220
>>  [<ffffffff803c3cd6>] driver_register+0x56/0x130
>>  [<ffffffff80370678>] __pci_register_driver+0x68/0xb0
>>  [<ffffffff806e5060>] tg3_init+0x0/0x20
>>  [<ffffffff806c8a63>] kernel_init+0x153/0x320
>>  [<ffffffff8020c378>] child_rip+0xa/0x12
>>  [<ffffffff806c8910>] kernel_init+0x0/0x320
>>  [<ffffffff8020c36e>] child_rip+0x0/0x12
>>
>>
>> Code: 89 05 27 88 43 00 7f 29 48 0f bf c1 48 8d 14 00 48 c1 e0 03 48 29 d0 48 8d 90 00 44 74 80 66 89 32 66 44 89 42 02 48 83 c4 08 c3 <0f> 0b eb fe 66 90 48 c7 c7 08 7d 5e 80 31 c0 e8 72 7b 01 00 66 
>> RIP  [<ffffffff8021b9da>] add_pin_to_irq+0x7a/0x90
>>  RSP <ffff81061e4cbb60>
>> ---[ end trace 5a53b6247c28d358 ]---
> 
> Here:
> 
> static void add_pin_to_irq(unsigned int irq, int apic, int pin)
> {
> 	static int first_free_entry = NR_IRQS;
> 	struct irq_pin_list *entry = irq_2_pin + irq;
> 
> 	BUG_ON(irq >= NR_IRQS);
> 
> 
> There are massive changes to tg3, massive changes in the relevant x86
> ACPI code and massive changes everywhere else.
> 
> So I don't have a clue who broke it, but it wasn't me!
> 
> You're testing linux-next, aren't you.  Did you test the June 6 tree,
> upon which 2.6.26-rc5-mm1 was based?
> 

This panic was seen in linux-next tree of may 19/20/21/22/23 kernels
and was reported (http://lkml.org/lkml/2008/5/21/285). It was not visible
in any June linux-next kernels. I will try and bisect the panic.

-- 
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
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