This is ipp014.unknown_domain (Linux x86_64 2.6.27-rc8-00016-gd3a47e8) 11:59:12

ipp014 login: [80788.502843] ------------[ cut here ]------------
[80788.506099] WARNING: at kernel/lockdep.c:2609 __lock_acquire+0x72a/0x7a2()
[80788.506099] Modules linked in: w83627hf hwmon_vid autofs4 smsc37b787_wdt i2c_nforce2 i2c_core k8temp forcedeth tg3 libphy e1000 xfs dm_snapshot dm_mirror dm_log aacraid 3w_9xxx 3w_xxxx atp870u arcmsr aic7xxx scsi_wait_scan
[80788.506099] Pid: 28593, comm: ppStack Not tainted 2.6.27-rc8-00016-gd3a47e8 #1
[80788.506099] 
[80788.506099] Call Trace:
[80788.506099]    [] warn_on_slowpath+0x51/0x77
[80788.506099]  [] rb_insert_color+0x61/0xda
[80788.506099]  [] hrtimer_start+0x111/0x133
                 [80788.506099]  [] hrtick_start_fair+0xfa/0x161
[80788.506099]  [] __lock_acquire+0x72a/0x7a2
[80788.506099]  [] process_timeout+0x0/0x5
[80788.506099]  [] lock_acquire+0x52/0x6d
[80788.506099]  [] run_timer_softirq+0x19f/0x1dd
[80788.506099]  [] _spin_lock_irq+0x2a/0x35
[80788.506099]  [] run_timer_softirq+0x19f/0x1dd
[80788.506099]  [] run_timer_softirq+0x19f/0x1dd
[80788.506099]  [] __do_softirq+0x5e/0xcd

[80788.506099]  [] call_softirq+0x1c/0x28
[80788.506099]  [] do_softirq+0x2c/0x68
[80788.506099]  [] irq_exit+0x3f/0x85
[80788.506099]  [] smp_apic_timer_interrupt+0x8e/0xa9
[80788.506099]  [] apic_timer_interrupt+0x66/0x70
[80788.506099]   
[80788.506099] ---[ end trace fdbd13cde373e2ec ]---
[80853.833171] BUG: soft lockup - CPU#3 stuck for 61s! [pclient:25314]
[80853.833171] Modules linked in: w83627hf hwmon_vid autofs4 smsc37b787_wdt i2c_nforce2 i2c_core k8temp forcedeth tg3 libphy e1000 xfs dm_snapshot dm_mirror dm_log aacraid 3w_9xxx 3w_xxxx atp870u arcmsr aic7xxx scsi_wait_scan
[80853.833171] CPU 3:
[80853.833171] Modules linked in: w83627hf hwmon_vid autofs4 smsc37b787_wdt i2c_nforce2 i2c_core k8temp forcedeth tg3 libphy e1000 xfs dm_snapshot dm_mirror dm_log aacraid 3w_9xxx 3w_xxxx atp870u arcmsr aic7xxx scsi_wait_scan
[80853.833171] Pid: 25314, comm: pclient Tainted: G        W 2.6.27-rc8-00016-gd3a47e8 #1
[80853.833171] RIP: 0010:[]  [] _spin_unlock_irqrestore+0x29/0x2e
[80853.833171] RSP: 0018:ffff8802190f7998  EFLAGS: 00000292
[80853.833171] RAX: 0000000000000003 RBX: 0000000000000292 RCX: ffffffff8023de78
[80853.833171] RDX: 000000000000faf9 RSI: 0000000000000001 RDI: ffff88022fa48000
[80853.833171] RBP: ffff88021f9a8000 R08: 0000000000000001 R09: 0000000000000001
[80853.833171] R10: 0000000000000000 R11: ffffffff8023de78 R12: 0000000000000000
[80853.833171] R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8023de78
[80853.833171] FS:  00007ffe1db966f0(0000) GS:ffff88022fa0d780(0000) knlGS:0000000000000000
[80853.833171] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[80853.833171] CR2: 00007f07bd6b3000 CR3: 000000021d5d5000 CR4: 00000000000006e0

[80853.833171] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[80853.833171] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[80853.833171] 
[80853.833171] Call Trace:
[80853.833171]  [] ? try_to_del_timer_sync+0x51/0x5a
[80853.833171]  [] ? del_timer_sync+0xe/0x16
[80853.833171]  [] ? del_timer_sync+0xc/0x16
[80853.833171]  [] ? schedule_timeout+0x92/0xad
[80853.833171]  [] ? process_timeout+0x0/0x5
[80853.833171]  [] ? schedule_timeout+0x85/0xad
[80853.833171]  [] ? do_select+0x450/0x4a9
[80853.833171]  [] ? do_select+0x0/0x4a9
[80853.833171]  [] ? __pollwait+0x0/0xe1
[80853.833171]  [] ? default_wake_function+0x0/0xe
[80853.833171]  [] ? hrtick_start_fair+0x149/0x161
[80853.833171]  [] ? try_to_wake_up+0x226/0x238
[80853.833171]  [] ? __wake_up_common+0x41/0x74
[80853.833171]  [] ? _read_unlock+0x17/0x20
[80853.833171]  [] ? unix_stream_sendmsg+0x21a/0x2db
[80853.833171]  [] ? core_sys_select+0x1fc/0x2a4
[80853.833171]  [] ? core_sys_select+0x31/0x2a4
[80853.833171]  [] ? do_sync_write+0xc9/0x10c

[80853.833171]  [] ? rb_insert_color+0x61/0xda
[80853.833171]  [] ? sys_select+0x15a/0x183
[80853.833171]  [] ? lockdep_sys_exit_thunk+0x35/0x67
[80853.833171]  [] ? system_call_fastpath+0x16/0x1b
[80853.833171]