Re: 2.6.18-rc7-mm1 -- ppc64 crash in slab_node ??

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Hmmm seeing this on a ppc64 lpar.

PID hash table entries: 4096 (order: 12, 32768 bytes)
Console: colour dummy device 80x25
Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes)
Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes)
freeing bootmem node 0
freeing bootmem node 1
Memory: 2042288k/2097152k available (5752k kernel code, 55392k reserved,
1456k data, 875k bss, 252k init)
Unable to handle kernel paging request for data at address 0x00000004
Faulting instruction address: 0xc0000000000bc830
Oops: Kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=128 NUMA
Modules linked in:
NIP: C0000000000BC830 LR: C0000000000C7DF4 CTR: 0000000000000000
REGS: c00000000070f990 TRAP: 0300   Not tainted  (2.6.18-rc7-mm1-autokern1)
MSR: 8000000000001032 <ME,IR,DR>  CR: 24004022  XER: 0000000B
DAR: 0000000000000004, DSISR: 0000000040000000
TASK = c0000000005c0900[0] 'swapper' THREAD: c00000000070c000 CPU: 0
GPR00: C0000000000C80DC C00000000070FC10 C00000000070B1A0 0000000000000000
GPR04: 00000000000000D0 0000000000000000 0000000000000000 0000000000000042
GPR08: 0000000000000000 C0000000005C0900 0000000000000000 C00000007FFF3800
GPR12: 0000000024004022 C0000000005C1480 0000000000000000 0000000000000000
GPR16: 0000000000000000 0000000000000000 0000000000000000 4000000001C00000
GPR20: 0000000000000000 0000000000000000 0000000000141000 C0000000004DA2D0
GPR24: 000000000199FB40 0000000000000000 0000000000042000 C0000000005F31A8
GPR28: C0000000005F31A8 C0000000007416E8 C0000000005FCC60 00000000000000D0
NIP [C0000000000BC830] .slab_node+0x10/0x78
LR [C0000000000C7DF4] .fallback_alloc+0x3c/0x100
Call Trace:
[C00000000070FC10] [8000000000001032] 0x8000000000001032 (unreliable)
[C00000000070FCB0] [C0000000000C80DC] .kmem_cache_zalloc+0x128/0x150
[C00000000070FD50] [C0000000000C90BC] .kmem_cache_create+0x2a0/0x6ac
[C00000000070FE30] [C00000000057BF90] .kmem_cache_init+0x1b4/0x4f8
[C00000000070FEF0] [C00000000055F7BC] .start_kernel+0x214/0x33c
[C00000000070FF90] [C0000000000084F4] .start_here_common+0x50/0x5c
Instruction dump:
7fc3f378 60000000 e8010010 eba1ffe8 ebc1fff0 ebe1fff8 7c0803a6 4e800020
fbc1fff0 ebc2ce20 60000000 60000000 <a8030004> 2f800002 419e0038 2c800001
 <0>Kernel panic - not syncing: Attempted to kill the idle task!

Given all the problems with -mm1 I'm not sure how hard to search for this.

 -apw

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