[asterisk-users] dahdi_dummy soft lockup in dahdi-linux-2.2.0.2

[John A. Sullivan III]

Hello, all.  We attempted an upgraded from 1.6.1.1 to 1.6.1.2 today
including upgrading dahdi-linux from 2.1.0.4 to 2.2.0.2 and dahdi-tools
from 2.1.0.2 to 2.2.0.  After rebooting, we receive:

Aug  3 17:20:44 pbx01 kernel: BUG: soft lockup - CPU#2 stuck for 10s! [swapper:0]
Aug  3 17:20:44 pbx01 kernel: CPU 2:
Aug  3 17:20:44 pbx01 kernel: Modules linked in: ipv6 xfrm_nalgo crypto_api autofs4 dahdi_dummy(U) xpp_usb(U) xpp(U) wctc4xxp(U) dahdi_transcode(U) wcb4xx
Aug  3 17:20:44 pbx01 kernel: Pid: 0, comm: swapper Tainted: G      2.6.18-128.2.1.el5 #1
Aug  3 17:20:44 pbx01 kernel: RIP: 0010:[<ffffffff80064c08>]  [<ffffffff80064c08>] _spin_unlock_irqrestore+0x8/0x9
Aug  3 17:20:44 pbx01 kernel: RSP: 0018:ffff81011fc87e98  EFLAGS: 00000246
Aug  3 17:20:44 pbx01 kernel: RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
Aug  3 17:20:44 pbx01 kernel: RDX: 0000000000008020 RSI: 0000000000000246 RDI: ffffffff883ec3b0
Aug  3 17:20:44 pbx01 kernel: RBP: ffff81011fc87e10 R08: ffffffff8857f420 R09: ffff810080bf8b00
Aug  3 17:20:44 pbx01 kernel: R10: 0000000000000000 R11: 0000000000000282 R12: ffffffff8005dc8e
Aug  3 17:20:44 pbx01 kernel: R13: 0000000000000002 R14: ffffffff80077533 R15: ffff81011fc87e10
Aug  3 17:20:44 pbx01 kernel: FS:  0000000041e57940(0000) GS:ffff81011fc5ce40(0000) knlGS:0000000000000000
Aug  3 17:20:44 pbx01 kernel: CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
Aug  3 17:20:44 pbx01 kernel: CR2: 00002b75e2c8c0a0 CR3: 0000000000201000 CR4: 00000000000006e0
Aug  3 17:20:44 pbx01 kernel:
Aug  3 17:20:44 pbx01 kernel: Call Trace:
Aug  3 17:20:44 pbx01 kernel:  <IRQ>  [<ffffffff883e117b>] :dahdi:dahdi_receive+0x7ce/0x7f9
Aug  3 17:20:44 pbx01 kernel:  [<ffffffff885762ee>] :dahdi_dummy:dahdi_dummy_timer+0xb3/0xfd
Aug  3 17:20:44 pbx01 kernel:  [<ffffffff8857623b>] :dahdi_dummy:dahdi_dummy_timer+0x0/0xfd
Aug  3 17:20:44 pbx01 kernel:  [<ffffffff80094e14>] run_timer_softirq+0x133/0x1af
Aug  3 17:20:44 pbx01 kernel:  [<ffffffff80011fc3>] __do_softirq+0x89/0x133
Aug  3 17:20:44 pbx01 kernel:  [<ffffffff8005e2fc>] call_softirq+0x1c/0x28
Aug  3 17:20:44 pbx01 kernel:  [<ffffffff8006cada>] do_softirq+0x2c/0x85
Aug  3 17:20:44 pbx01 kernel:  [<ffffffff8006b287>] default_idle+0x0/0x50
Aug  3 17:20:44 pbx01 kernel:  [<ffffffff8005dc8e>] apic_timer_interrupt+0x66/0x6c
Aug  3 17:20:44 pbx01 kernel:  <EOI>  [<ffffffff8006b2b0>] default_idle+0x29/0x50
Aug  3 17:20:44 pbx01 kernel:  [<ffffffff80048d9e>] cpu_idle+0x95/0xb8
Aug  3 17:20:44 pbx01 kernel:  [<ffffffff80076c3f>] start_secondary+0x45a/0x469
Aug  3 17:20:44 pbx01 kernel:

We are running on fully patched CentOS 5.3:
[root at pbx01 Asterisk]# uname -a
Linux pbx.mycompany.com 2.6.18-128.2.1.el5 #1 SMP Tue Jul 14 06:36:37
EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

We are assuming this is a dahdi-linux problem.  Our procedure was a
straightforward make (as unprivileged user) and make install (as root).

Reverting to the previous versions on the same kernel resolves the
problem - John
-- 
John A. Sullivan III
Open Source Development Corporation
+1 207-985-7880
jsullivan at opensourcedevel.com

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