Andrew Morton wrote:

quoted

On Wed, 28 Nov 2007 11:59:00 +0530 Kamalesh Babulal [off-list ref] wrote:

quoted

Hi,

(cc linux-scsi, for sym53c8xx)

quoted

Soft lockup is detected while bootup with 2.6.24-rc3-git2 on powerbox

I assume this is a post-2.6.23 regression?

quoted

BUG: soft lockup - CPU#1 stuck for 11s! [insmod:375]
NIP: c00000000002f02c LR: d0000000001414fc CTR: c00000000002f018
REGS: c00000077cbef0b0 TRAP: 0901   Not tainted  (2.6.24-rc3-git2-autotest)
MSR: 8000000000009032 <EE,ME,IR,DR>  CR: 24022088  XER: 00000000
TASK = c00000077cbd8000[375] 'insmod' THREAD: c00000077cbec000 CPU: 1
GPR00: d0000000001414fc c00000077cbef330 c00000000052b930 d000080080002014 
GPR04: d00008008000202c 0000000000000000 c00000077ca1cb00 d00000000014ce54 
GPR08: c00000077ca1c63c 0000000000000000 000000000000002a c00000000002f018 
GPR12: d000000000143610 c000000000473d00 
NIP [c00000000002f02c] .ioread8+0x14/0x60
LR [d0000000001414fc] .sym_hcb_attach+0x1188/0x1378 [sym53c8xx]
Call Trace:
[c00000077cbef330] [c00000077cbef3c0] 0xc00000077cbef3c0 (unreliable)
[c00000077cbef3a0] [d0000000001414fc] .sym_hcb_attach+0x1188/0x1378 [sym53c8xx]
[c00000077cbef470] [d0000000001395f8] .sym2_probe+0x700/0x99c [sym53c8xx]
[c00000077cbef710] [c0000000001bc118] .pci_device_probe+0x124/0x1b0
[c00000077cbef7b0] [c000000000221138] .driver_probe_device+0x144/0x20c
[c00000077cbef850] [c000000000221450] .__driver_attach+0xcc/0x154
[c00000077cbef8e0] [c00000000021ff94] .bus_for_each_dev+0x7c/0xd4
[c00000077cbef9a0] [c000000000220e9c] .driver_attach+0x28/0x40
[c00000077cbefa20] [c0000000002204d8] .bus_add_driver+0x90/0x228
[c00000077cbefac0] [c000000000221858] .driver_register+0x94/0xb0
[c00000077cbefb40] [c0000000001bc430] .__pci_register_driver+0x6c/0xcc
[c00000077cbefbe0] [d000000000143428] .sym2_init+0x108/0x15b0 [sym53c8xx]
[c00000077cbefc80] [c00000000008ce80] .sys_init_module+0x17c4/0x1958
[c00000077cbefe30] [c00000000000872c] syscall_exit+0x0/0x40
Instruction dump:
60000000 786b0420 38210070 7d635b78 e8010010 7c0803a6 4e800020 7c0802a6 
f8010010 f821ff91 7c0004ac 89230000 <0c090000> 4c00012c 79290620 2f8900ff 

I see no obvious lockup sites near the end of sym_hcb_attach().  Maybe it's
being called lots of times from a higher level..  Do the traces all look
the same?

Hi Andrew,

I see this call trace twice and both looks similar and on another reboot
the following trace is seen twice in different cpu

BUG: soft lockup detected on CPU#3!
Call Trace:
[C00000003FEDEDA0] [C000000000010220] .show_stack+0x68/0x1b0 (unreliable)
[C00000003FEDEE40] [C0000000000A061C] .softlockup_tick+0xf0/0x13c
[C00000003FEDEEF0] [C000000000072E2C] .run_local_timers+0x1c/0x30
[C00000003FEDEF70] [C000000000022FA0] .timer_interrupt+0xa8/0x488
[C00000003FEDF050] [C0000000000034EC] decrementer_common+0xec/0x100

--- Exception: 901 at .ioread8+0x14/0x60
    LR = .sym_hcb_attach+0x1194/0x1384 [sym53c8xx]

[C00000003FEDF340] [D0000000002B3BC0] 0xd0000000002b3bc0 (unreliable)
[C00000003FEDF3B0] [D00000000029A3C0] .sym_hcb_attach+0x1194/0x1384 [sym53c8xx]
[C00000003FEDF480] [D000000000291D30] .sym2_probe+0x75c/0x9f8 [sym53c8xx]
[C00000003FEDF710] [C0000000001B65A4] .pci_device_probe+0x13c/0x1dc
[C00000003FEDF7D0] [C000000000219A0C] .driver_probe_device+0xa0/0x15c
[C00000003FEDF870] [C000000000219C64] .__driver_attach+0xb4/0x138
[C00000003FEDF900] [C00000000021913C] .bus_for_each_dev+0x7c/0xd4
[C00000003FEDF9C0] [C0000000002198B0] .driver_attach+0x28/0x40
[C00000003FEDFA40] [C000000000218BA4] .bus_add_driver+0x98/0x18c
[C00000003FEDFAE0] [C00000000021A064] .driver_register+0xa8/0xc4
[C00000003FEDFB60] [C0000000001B68AC] .__pci_register_driver+0x5c/0xa4
[C00000003FEDFBF0] [D00000000029C204] .sym2_init+0x104/0x1550 [sym53c8xx]
[C00000003FEDFC90] [C00000000008D1F4] .sys_init_module+0x1764/0x1998
[C00000003FEDFE30] [C00000000000869C] syscall_exit+0x0/0x40