"test" branch update

[Michael Ellerman]

On Mon, 2009-07-27 at 14:14 +1000, Benjamin Herrenschmidt wrote:
> Hi !
> 
> I've started collecting things for my -next branch. For now I put
> everything in -test, I'll move it over to -next in the upcoming couple
> of days if there's no major issue found.

I'm seeing this on Power 6 (Didgo3), haven't had a chance to look any
closer, 100% reproducible, using SLUB.

HugeTLB registered 16 MB page size, pre-allocated 0 pages
HugeTLB registered 16 GB page size, pre-allocated 0 pages
HugeTLB registered 64 KB page size, pre-allocated 0 pages
Unable to handle kernel paging request for data at address 0x00000000
Faulting instruction address: 0xc00000000003ea98
cpu 0x0: Vector: 300 (Data Access) at [c0000000fe6e3840]
    pc: c00000000003ea98: .strcmp+0x10/0x24
    lr: c0000000001c8e60: .sysfs_find_dirent+0x3c/0x78
    sp: c0000000fe6e3ac0
   msr: 8000000000009032
   dar: 0
 dsisr: 40000000
  current = 0xc0000000fe6d8000
  paca    = 0xc000000000ab3200
    pid   = 1, comm = swapper
enter ? for help
[link register   ] c0000000001c8e60 .sysfs_find_dirent+0x3c/0x78
[c0000000fe6e3ac0] c0000000001c939c .sysfs_addrm_start+0x70/0xec
(unreliable)
[c0000000fe6e3b50] c0000000001c6f50 .sysfs_hash_and_remove+0x58/0xb0
[c0000000fe6e3c10] c0000000001ca8a4 .sysfs_remove_link+0x4c/0x6c
[c0000000fe6e3cb0] c00000000014612c .sysfs_slab_alias+0x64/0x154
[c0000000fe6e3d60] c00000000090e22c .slab_sysfs_init+0xd4/0x130
[c0000000fe6e3e00] c000000000009848 .do_one_initcall+0x90/0x1b8
[c0000000fe6e3ef0] c0000000008ef4c0 .kernel_init+0x1f8/0x278
[c0000000fe6e3f90] c00000000002f570 .kernel_thread+0x54/0x70
0:mon> r
R00 = c0000000001c6f50   R16 = 0000000000000000
R01 = c0000000fe6e3ac0   R17 = 0000000004d2dbb8
R02 = c000000000a72248   R18 = c00000000092da50
R03 = 0000000000000073   R19 = 0000000000000000
R04 = ffffffffffffffff   R20 = 0000000002f1fed0
R05 = c0000000feb70460   R21 = 0000000004d2da78
R06 = c0000000fec19640   R22 = 0000000004400000
R07 = 0000000000000001   R23 = c00000000092da48
R08 = ffffffffffffffff   R24 = c00000000092da58
R09 = c000000000bd6080   R25 = 00000000010ad378
R10 = 0000000000000816   R26 = c000000000aa7ac0
R11 = 0000000000000012   R27 = 0000000000000000
R12 = 0000000024000084   R28 = 0000000000000000
R13 = c000000000ab3200   R29 = c0000000fec19690
R14 = 0000000000000000   R30 = c0000000009ddd98
R15 = 0000000000000000   R31 = c0000000fe6e3ac0
pc  = c00000000003ea98 .strcmp+0x10/0x24
lr  = c0000000001c8e60 .sysfs_find_dirent+0x3c/0x78
msr = 8000000000009032   cr  = 24000048
ctr = 0000000000000000   xer = 000000002000000b   trap =  300
dar = 0000000000000000   dsisr = 40000000
0:mon>

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