linux-kernel - 2.6.17.11: soft lockup detected on CPU#0

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Message-Id: <200608281115.20692.lists@naasa.net>
Date:	Mon, 28 Aug 2006 11:15:20 +0200
From:	Joerg Platte <lists@...sa.net>
To:	linux-kernel@...r.kernel.org
Subject: 2.6.17.11: soft lockup detected on CPU#0

Hi,

I'm regulary suspending my notebook. After resume skype typically produces a 
lot of processor load when trying to call somebody and I have to restart it 
to make it work again. Today, with a new kernel, skype seems to cause a soft 
lockup resulting in a freeze for a few seconds:

BUG: soft lockup detected on CPU#0!
 <c012dd51> softlockup_tick+0x85/0x99  <c011b6d4> 
update_process_times+0x35/0x57
 <c01053b1> timer_interrupt+0x3e/0x69  <c012ddee> handle_IRQ_event+0x23/0x4c
 <c012de8f> __do_IRQ+0x78/0xd1  <c01042cb> do_IRQ+0x19/0x24
 <c0102cae> common_interrupt+0x1a/0x20
BUG: soft lockup detected on CPU#0!
 <c012dd51> softlockup_tick+0x85/0x99  <c011b6d4> 
update_process_times+0x35/0x57
 <c01053b1> timer_interrupt+0x3e/0x69  <c012ddee> handle_IRQ_event+0x23/0x4c
 <c012de8f> __do_IRQ+0x78/0xd1  <c01042cb> do_IRQ+0x19/0x24
 <c0102cae> common_interrupt+0x1a/0x20

I know, skype is closed source and cannot be debugged, but even a closed 
source userland program should not be able to cause a lockup. Is the 
information given above useful to find the problem inside the kernel? If not, 
what can I do to provide better debug information? I'm using a vanilla 
2.6.17.11 kernel: 
Linux ibm 2.6.17.11 #1 PREEMPT Sat Aug 26 18:55:43 CEST 2006 i686 GNU/Linux

regards,
Jörg
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