Date:	Wed, 05 Mar 2008 19:22:12 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [BUG] 2.6.25-rc3-mm1 kernel panic while bootup on powerpc ()


On Tue, 2008-03-04 at 18:42 +0530, Kamalesh Babulal wrote:
> Hi Andrew,
> 
> The 2.6.25-rc3-mm1 kernel panics while bootup on power box. The machine booted up
> without the panic on the third attempt, but badness call trace were seen while running
> tests

We are taking a HW interrupt ... we aren't supposed to take HW
interrupts that early during boot afaik.

Is it yet another case of somebody hard-enabling interrupts with
local_irq_enable() ?

Ben.

> 1) The kernel panic on first attempt
> 
> Unable to handle kernel paging request for data at address 0x00000000
> Faulting instruction address: 0xc00000000000cb2c
> Oops: Kernel access of bad area, sig: 11 [#1]
> SMP NR_CPUS=128 NUMA pSeries
> Modules linked in:
> NIP: c00000000000cb2c LR: c00000000000caf8 CTR: 0000000000000226
> REGS: c00000000068f360 TRAP: 0300   Not tainted  (2.6.25-rc3-mm1-autotest)
> MSR: 8000000000001032 <ME,IR,DR>  CR: 28000024  XER: 20000001
> DAR: 0000000000000000, DSISR: 0000000040000000
> TASK = c0000000005c8590[0] 'swapper' THREAD: c00000000068c000 CPU: 0
> GPR00: c00000000068f5e0 c00000000068f5e0 c00000000068e690 0000000000000000 
> GPR04: 00000000000035e0 000000000087264e c000000008011280 c000000000594000 
> GPR08: c0000000005c9300 0000000000000000 c000000000591090 c00000000068c000 
> GPR12: 8000000000009032 c0000000005c9300 0000000000000000 0000000000000000 
> GPR16: 0000000000000000 0000000000000000 0000000000008000 0000000000000000 
> GPR20: 0000000000000000 0000000000000000 000000000000007f 0000000000018000 
> GPR24: 0000000000000001 0000000000000080 0000000000000018 0000000000000000 
> GPR28: 0000000000000c00 c000000000588988 c000000000639be8 c000000008001c00 
> NIP [c00000000000cb2c] .do_IRQ+0x74/0x1c4
> LR [c00000000000caf8] .do_IRQ+0x40/0x1c4
> Call Trace:
> [c00000000068f5e0] [c00000000000caf8] .do_IRQ+0x40/0x1c4 (unreliable)
> [c00000000068f680] [c000000000004790] hardware_interrupt_entry+0x18/0x1c
> --- Exception: 501 at .memset+0x70/0xfc
>     LR = .__alloc_bootmem_core+0x39c/0x3dc
> [c00000000068f970] [c00000000068fa10] init_thread_union+0x3a10/0x4000 (unreliable)
> [c00000000068fa30] [c00000000057237c] .__alloc_bootmem_node+0x38/0x8c
> [c00000000068fad0] [c0000000003c477c] .zone_wait_table_init+0x74/0x108
> [c00000000068fb60] [c0000000003d9058] .init_currently_empty_zone+0x40/0x11c
> [c00000000068fc00] [c0000000003d94c8] .free_area_init_node+0x394/0x3fc
> [c00000000068fcf0] [c00000000057314c] .free_area_init_nodes+0x2d8/0x364
> [c00000000068fd90] [c00000000056682c] .paging_init+0x40/0x58
> [c00000000068fe40] [c00000000055ba34] .setup_arch+0x20c/0x240
> [c00000000068fee0] [c000000000552690] .start_kernel+0xdc/0x414
> [c00000000068ff90] [c000000000008594] .start_here_common+0x54/0xc0
> Instruction dump:
> 7c200b78 780404a0 2ba408ff 41bd001c e87e80a8 3884ff00 48058d21 60000000 
> 480054cd 60000000 e93e80b0 e92900b8 <e8090000> f8410028 e9690010 e8490008 
> 
> 2) The kernel panic on second attempt
> 
> Unable to handle kernel paging request for data at address 0x00000000
> Faulting instruction address: 0xc00000000000cb2c
> Oops: Kernel access of bad area, sig: 11 [#1]
> SMP NR_CPUS=128 NUMA pSeries
> Modules linked in:
> NIP: c00000000000cb2c LR: c00000000000caf8 CTR: 0000000000014a99
> REGS: c00000000068f410 TRAP: 0300   Not tainted  (2.6.25-rc3-mm1-autotest)
> MSR: 8000000000001032 <ME,IR,DR>  CR: 28000044  XER: 00000001
> DAR: 0000000000000000, DSISR: 0000000040000000
> TASK = c0000000005c8590[0] 'swapper' THREAD: c00000000068c000 CPU: 0
> GPR00: c00000000068f690 c00000000068f690 c00000000068e690 0000000000000000 
> GPR04: 0000000000003690 0000000000537672 c000000001ad59c0 c000000000594000 
> GPR08: c0000000005c9300 0000000000000000 c000000000591090 c00000000068c000 
> GPR12: 8000000000009032 c0000000005c9300 0000000000000000 0000000000000000 
> GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
> GPR20: 0000000000230000 0000000000000000 0000000000ffffff 0000000001000000 
> GPR24: 0000000000001000 0000000001000000 0000000000001000 0000000000000000 
> GPR28: 0000000000000000 c0000000005889c8 c000000000639be8 c000000001000000 
> NIP [c00000000000cb2c] .do_IRQ+0x74/0x1c4
> LR [c00000000000caf8] .do_IRQ+0x40/0x1c4
> Call Trace:
> [c00000000068f690] [c00000000000caf8] .do_IRQ+0x40/0x1c4 (unreliable)
> [c00000000068f730] [c000000000004790] hardware_interrupt_entry+0x18/0x1c
> --- Exception: 501 at .memset+0x80/0xfc
>     LR = .__alloc_bootmem_core+0x39c/0x3dc
> [c00000000068fa20] [c000000000641a78] sysctl_pernet_ops+0x108e0/0x1d6e0 (unreliable)
> [c00000000068fae0] [c00000000057237c] .__alloc_bootmem_node+0x38/0x8c
> [c00000000068fb80] [c0000000003c48dc] .__earlyonly_bootmem_alloc+0x24/0x3c
> [c00000000068fc00] [c0000000003d885c] .vmemmap_populate+0x7c/0xf4
> [c00000000068fc90] [c0000000003d9b6c] .sparse_mem_map_populate+0x38/0x64
> [c00000000068fd10] [c000000000573ec4] .sparse_early_mem_map_alloc+0x54/0x98
> [c00000000068fda0] [c000000000573f70] .sparse_init+0x68/0x148
> [c00000000068fe40] [c00000000055b9ec] .setup_arch+0x1c4/0x240
> [c00000000068fee0] [c000000000552690] .start_kernel+0xdc/0x414
> [c00000000068ff90] [c000000000008594] .start_here_common+0x54/0xc0
> Instruction dump:
> 7c200b78 780404a0 2ba408ff 41bd001c e87e80a8 3884ff00 48058d21 60000000 
> 480054cd 60000000 e93e80b0 e92900b8 <e8090000> f8410028 e9690010 e8490008 
> 
> 3) Third attempt kernel booted up but had the following call trace 264 times while running
> test
> 
> Badness at include/linux/gfp.h:110
> NIP: c0000000000b4ff0 LR: c0000000000b4fa0 CTR: c00000000019cdb4
> REGS: c000000009edf250 TRAP: 0700   Not tainted  (2.6.25-rc3-mm1-autotest)
> MSR: 8000000000029032 <EE,ME,IR,DR>  CR: 22024042  XER: 20000003
> TASK = c000000009062140[548] 'kjournald' THREAD: c000000009edc000 CPU: 0
> NIP [c0000000000b4ff0] .get_page_from_freelist+0x29c/0x898
> LR [c0000000000b4fa0] .get_page_from_freelist+0x24c/0x898
> Call Trace:
> [c000000009edf5f0] [c0000000000b56e4] .__alloc_pages_internal+0xf8/0x470
> [c000000009edf6e0] [c0000000000e0458] .kmem_getpages+0x8c/0x194
> [c000000009edf770] [c0000000000e1050] .fallback_alloc+0x194/0x254
> [c000000009edf820] [c0000000000e14b0] .kmem_cache_alloc+0xd8/0x144
> [c000000009edf8c0] [c0000000001fe0f8] .radix_tree_preload+0x50/0xd4
> [c000000009edf960] [c0000000000ad048] .add_to_page_cache+0x38/0x12c
> [c000000009edfa00] [c0000000000ad158] .add_to_page_cache_lru+0x1c/0x4c
> [c000000009edfa90] [c0000000000add58] .find_or_create_page+0x60/0xa8
> [c000000009edfb30] [c00000000011e478] .__getblk+0x140/0x310
> [c000000009edfc00] [c0000000001b78c4] .journal_get_descriptor_buffer+0x44/0xd8
> [c000000009edfca0] [c0000000001b236c] .journal_commit_transaction+0x948/0x1590
> [c000000009edfe00] [c0000000001b585c] .kjournald+0xf4/0x2ac
> [c000000009edff00] [c00000000007ff4c] .kthread+0x84/0xd0
> [c000000009edff90] [c000000000028900] .kernel_thread+0x4c/0x68
> Instruction dump:
> 7dc57378 48009575 60000000 2fa30000 419e0490 56c902d8 3c000018 7dd907b4 
> 7ad2c7e2 7f890000 7c000026 5400fffe <0b000000> e93e8128 3b000000 80090000 

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