[BUG] linux-next: Tree for April 14 - kernel BUG at arch/powerpc/mm/init_64.c:240!(fixed in -mm)

[Kamalesh Babulal]

Hi Stephen,

The next-20080414 kernel panic's while booting up on the ppc machines.
The same was seen in the 2.6.25-rc8-mm1 kernel and was fixed by
the patch at http://lkml.org/lkml/2008/4/2/650 

------------[ cut here ]------------
kernel BUG at arch/powerpc/mm/init_64.c:240!
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=128 NUMA pSeries
Modules linked in:
NIP: c0000000006ca18c LR: c0000000006ca184 CTR: 0000000000000000
REGS: c00000000081f950 TRAP: 0700   Not tainted  (2.6.25-rc9-next-20080414-x86-latest.git-autotest)
MSR: 8000000000021032 <ME,IR,DR>  CR: 24000088  XER: 20000001
TASK = c0000000007334d0[0] 'swapper' THREAD: c00000000081c000 CPU: 0
GPR00: c0000000006ca184 c00000000081fbd0 c00000000081c778 0000000000000001 
GPR04: c0000000006def90 000000000000016e 0000000000000170 0000000000001090 
GPR08: 0000000207038208 0000000000000000 0000000000000001 800000000ed93080 
GPR12: c00000000081fae0 c000000000733e80 0000000000000000 c0000000005f4788 
GPR16: 4000000002100000 c0000000005f3010 0000000000000000 000000000023f000 
GPR20: 00000000027d07d8 c0000000006d07d8 00000000027d0a48 c0000000006d0a48 
GPR24: c0000000005f41c8 0000000002b00000 0000000000000000 0000000000000000 
GPR28: cf000000001f8000 cf00000001000000 0000000001000000 cf00000000000000 
NIP [c0000000006ca18c] .vmemmap_populate+0xbc/0x100
LR [c0000000006ca184] .vmemmap_populate+0xb4/0x100
Call Trace:
[c00000000081fbd0] [c0000000006ca184] .vmemmap_populate+0xb4/0x100 (unreliable)
[c00000000081fc70] [c0000000006cae08] .sparse_mem_map_populate+0x38/0x5c
[c00000000081fd00] [c0000000006b8db0] .sparse_early_mem_map_alloc+0x54/0x94
[c00000000081fd90] [c0000000006b91d8] .sparse_init+0x1dc/0x218
[c00000000081fe40] [c0000000006a54f4] .setup_arch+0x1ac/0x218
[c00000000081fed0] [c00000000069c6c0] .start_kernel+0xec/0x464
[c00000000081ff90] [c000000000008524] .start_here_common+0x54/0xb0
Instruction dump:
7fe3fb78 7ca02a14 4082000c 3860fff4 48000040 e9228980 e9628988 e8e90002 
e90b0002 4b961ab1 60000000 78630fe0 <0b030000> 7ffff214 7fbdf214 7fbfe040 
---[ end trace 8640abe69a316dee ]---
Kernel panic - not syncing: Attempted to kill the idle task!
Call Trace:
[c00000000081f470] [c00000000000f970] .show_stack+0x70/0x1bc (unreliable)
[c00000000081f520] [c0000000000540fc] .panic+0x80/0x1b8
[c00000000081f5c0] [c000000000058ca4] .do_exit+0x8c/0x758
[c00000000081f680] [c0000000000235cc] .die+0x24c/0x27c
[c00000000081f720] [c0000000000238fc] ._exception+0x88/0x204
[c00000000081f8e0] [c000000000004a84] program_check_common+0x104/0x180
--- Exception: 700 at .vmemmap_populate+0xbc/0x100
    LR = .vmemmap_populate+0xb4/0x100
[c00000000081fc70] [c0000000006cae08] .sparse_mem_map_populate+0x38/0x5c
[c00000000081fd00] [c0000000006b8db0] .sparse_early_mem_map_alloc+0x54/0x94
[c00000000081fd90] [c0000000006b91d8] .sparse_init+0x1dc/0x218
[c00000000081fe40] [c0000000006a54f4] .setup_arch+0x1ac/0x218
[c00000000081fed0] [c00000000069c6c0] .start_kernel+0xec/0x464
[c00000000081ff90] [c000000000008524] .start_here_common+0x54/0xb0



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