Problems with NFS root on arch/ppc after pulling 2.6.26-rc6, on PPC405

Tue Jun 17 09:22:39 EST 2008

I'm not seeing any issue with arch/powerpc. 

But with arch/ppc I'm seeing problems with NFS root after I pulled in
2.6.26-rc6.  Has anyone else seen anything like this?

It's consistent in that it typically happens on boot after freeing
unused kernel memory, but the actual task that running seems to vary.

We were running on 2.6.25 without the issue.

Thanks,

John

   11.660218] Looking up port of RPC 100003/2 on 172.16.40.76

[   11.740956] Looking up port of RPC 100005/1 on 172.16.40.76

[   11.859230] VFS: Mounted root (nfs filesystem).

[   11.914236] Freeing unused kernel memory: 108k init

[   12.175480] Oops: kernel access of bad area, sig: 11 [#1]

[   12.240202] NIP: c01b74a8 LR: c01b7424 CTR: c0014664

[   12.299677] REGS: c34b9ec0 TRAP: 0300   Not tainted  (2.6.26-rc6)

[   12.372670] MSR: 00021030 <ME,IR,DR>  CR: 95000033  XER: c0000025

[   12.446306] DEAR: 0000002c, ESR: 00000000

[   12.494326] TASK = c3c580a0[178] 'rpciod/0' THREAD: c34b8000

[   12.560037] GPR00: 0000002c c34b9f70 c3c580a0 c3c450c0 c025d078
00000032 00000001 00000032

[   12.661061] GPR08: 10682916 00000037 0000058f c025d028 625a0000
ffffffff ffffffff ffffffff

[   12.762088] GPR16: ffffffff ffffffff ffffffff ffffffff ffffffff
ffffffff ffffffff ffffffff

[   12.863113] GPR24: ffffffff c0027b74 c34b8000 c3c581f4 c3c450c0
00000000 c3c580a0 00000000

[   12.966324] NIP [c01b74a8] schedule+0x1ec/0x348

[   13.020693] LR [c01b7424] schedule+0x168/0x348

[   13.074016] Call Trace:

[   13.103285] [c34b9f70] [c01b7424] schedule+0x168/0x348 (unreliable)

[   13.178688] [c34b9fa0] [c0027b74] worker_thread+0x7c/0xb8

[   13.243573] [c34b9fd0] [c002b264] kthread+0x50/0x8c

[   13.302209] [c34b9ff0] [c00048d8] kernel_thread+0x44/0x60

[   13.367090] Instruction dump:

[   13.402714] 7d290194 912b0028 914b002c 813b0000 39290001 913b0000
83bc00b4 83fe00b8

[   13.496342] 2f9d0000 40be0024 93fc00b8 381f002c <7d000028> 31080001
7c00022c 7d00012d

[   13.594651] ------------[ cut here ]------------

[   13.649976] kernel BUG at kernel/exit.c:1098!

[   13.702155] XXX: Exception

[   13.702170]   Signal: 5

[   13.702182]   Code:   30001

[   13.702195]   Addr:   0

[   13.826503] Oops: Exception in kernel mode, sig: 5 [#2]

[   13.889100] NIP: c0019b78 LR: c0019b78 CTR: c0014664

[   13.948580] REGS: c34b9d90 TRAP: 0700   Tainted: G      D
(2.6.26-rc6)

[   14.029904] MSR: 00029030 <EE,ME,IR,DR>  CR: 39005093  XER: e0000025

[   14.106772] TASK = c3c580a0[178] 'rpciod/0' THREAD: c34b8000

[   14.172485] GPR00: c0019b78 c34b9e40 c3c580a0 c3c450c0 c025d078
c025d078 00000001 00000002

[   14.273509] GPR08: 00000000 00000000 54fcebe2 00000000 1a8fe938
ffffffff ffffffff ffffffff

[   14.374534] GPR16: ffffffff ffffffff ffffffff ffffffff ffffffff
ffffffff ffffffff ffffffff

[   14.475560] GPR24: ffffffff c0027b74 00000001 c3c58098 c3c178a0
c3c58188 c3c580a0 00000020

[   14.578771] NIP [c0019b78] do_exit+0x5d8/0x5e0

[   14.632097] LR [c0019b78] do_exit+0x5d8/0x5e0

[   14.684379] Call Trace:

[   14.713649] [c34b9e40] [c0019b78] do_exit+0x5d8/0x5e0 (unreliable)

[   14.788011] [c34b9e80] [c00035bc] nonrecoverable_exception+0x0/0x4c

[   14.863310] [c34b9e90] [c0009a18] bad_page_fault+0x48/0x5c

[   14.929236] [c34b9eb0] [c0002d28] handle_page_fault+0x7c/0x80

[   14.998287] [c34b9f70] [c01b7424] schedule+0x168/0x348

[   15.060049] [c34b9fa0] [c0027b74] worker_thread+0x7c/0xb8

[   15.124934] [c34b9fd0] [c002b264] kthread+0x50/0x8c

[   15.183570] [c34b9ff0] [c00048d8] kernel_thread+0x44/0x60

[   15.248454] Instruction dump:

[   15.284076] 2f800000 61290008 913e000c 419e0008 480c4315 807e03fc
2f830000 419e0008

[   15.377703] 4804939d 38000040 901e0000 4819d749 <0fe00000> 48000000
7c0802a6 9421fff0

[   15.475780] Fixing recursive fault but reboot is needed!

[   15.539679] Oops: kernel access of bad area, sig: 11 [#3]

[   15.604344] NIP: c01b74a8 LR: c01b7424 CTR: c0014664

[   15.663821] REGS: c34b9bb0 TRAP: 0300   Tainted: G      D
(2.6.26-rc6)

[   15.745146] MSR: 00021030 <ME,IR,DR>  CR: 99005053  XER: c0000025

[   15.818782] DEAR: 0000002c, ESR: 00000000

[   15.866801] TASK = c3c580a0[178] 'rpciod/0' THREAD: c34b8000

[   15.932513] GPR00: 0000002c c34b9c60 c3c580a0 c3c44490 c025d078
c3c444b8 00000000 00000000

[   16.033537] GPR08: 26098f63 00000001 00000590 c025d028 feced300
ffffffff ffffffff ffffffff

[   16.134563] GPR16: ffffffff ffffffff ffffffff ffffffff ffffffff
ffffffff ffffffff ffffffff

[   16.235589] GPR24: ffffffff c0019660 c34b8000 c3c45218 c3c44490
00000000 c3c450c0 00000000

[   16.338799] NIP [c01b74a8] schedule+0x1ec/0x348

[   16.393167] LR [c01b7424] schedule+0x168/0x348

[   16.446490] Call Trace:

[   16.475760] [c34b9c60] [c01b7424] schedule+0x168/0x348 (unreliable)

[   16.551163] [c34b9c90] [c0019660] do_exit+0xc0/0x5e0

[   16.610840] [c34b9cd0] [c00035bc] nonrecoverable_exception+0x0/0x4c

[   16.686140] [c34b9ce0] [c0003658] _exception+0x50/0xdc

[   16.747901] [c34b9d80] [c0002e70] ret_from_except_full+0x0/0x4c

[   16.819037] [c34b9e40] [c0019b78] do_exit+0x5d8/0x5e0

[   16.879755] [c34b9e80] [c00035bc] nonrecoverable_exception+0x0/0x4c

[   16.955055] [c34b9e90] [c0009a18] bad_page_fault+0x48/0x5c

[   17.020983] [c34b9eb0] [c0002d28] handle_page_fault+0x7c/0x80

[   17.090034] [c34b9f70] [c01b7424] schedule+0x168/0x348

[   17.151796] [c34b9fa0] [c0027b74] worker_thread+0x7c/0xb8

[   17.216680] [c34b9fd0] [c002b264] kthread+0x50/0x8c

[   17.275317] [c34b9ff0] [c00048d8] kernel_thread+0x44/0x60

[   17.340198] Instruction dump:

[   17.375821] 7d290194 912b0028 914b002c 813b0000 39290001 913b0000
83bc00b4 83fe00b8

[   17.469449] 2f9d0000 40be0024 93fc00b8 381f002c <7d000028> 31080001
7c00022c 7d00012d

[   17.568873] Fixing recursive fault but reboot is needed!

[   17.632776] Oops: kernel access of bad area, sig: 11 [#4]

[   17.697446] NIP: c01b74a8 LR: c01b7424 CTR: c0014664

[   17.756920] REGS: c34b9a50 TRAP: 0300   Tainted: G      D
(2.6.26-rc6)

[   17.838245] MSR: 00021030 <ME,IR,DR>  CR: 99005053  XER: c0000025

[   17.911880] DEAR: 0000002c, ESR: 00000000

[   17.959903] TASK = c3c580a0[178] 'rpciod/0' THREAD: c34b8000

[   18.025612] GPR00: 0000002c c34b9b00 c3c580a0 c3c16860 c025d078
c3c450f4 00000000 00000000

[   18.126636] GPR08: 7a5fbbd5 00000001 00000591 c025d028 26098f63
ffffffff ffffffff ffffffff

[   18.227662] GPR16: ffffffff ffffffff ffffffff ffffffff ffffffff
ffffffff ffffffff ffffffff

[   18.328688] GPR24: ffffffff c0019660 c34b8000 c3c445e8 c3c16860
00000000 c3c44490 00000000

[   18.431898] NIP [c01b74a8] schedule+0x1ec/0x348

[   18.486267] LR [c01b7424] schedule+0x168/0x348

[   18.539589] Call Trace:

[   18.568859] [c34b9b00] [c01b7424] schedule+0x168/0x348 (unreliable)

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