linux-kernel - Re: Kaffeine problem with CFS

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Date:	Wed, 18 Apr 2007 11:17:14 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Christoph Pfister <christophpfister@...il.com>
Cc:	S.Çağlar Onur <caglar@...dus.org.tr>,
	linux-kernel@...r.kernel.org,
	Michael Lothian <mike@...eburn.co.uk>,
	Christophe Thommeret <hftom@...e.fr>,
	Jurgen Kofler <kaffeine@....net>,
	Ulrich Drepper <drepper@...hat.com>
Subject: Re: Kaffeine problem with CFS


* Christoph Pfister <christophpfister@...il.com> wrote:

> >are the updated backtraces in the followup mail i just sent more 
> >useful? (I still have that stuck session running so i can whatever 
> >debugging you'd like to see done.)
> 
> QWidget::setUpdatesEnabled() is (wrongly) present in every thread 
> except the main. So I'm afraid there's nothing which can be done :-/ 
> Btw the main thread is waiting for the first frame being displayed 
> after the seek.

i didnt have all the debuginfo packages installed. I installed some (but 
not all yet), here's an updated backtrace:

(gdb) bt
#0  0xffffe410 in __kernel_vsyscall ()
#1  0x4a2539e1 in __lll_mutex_unlock_wake () from /lib/libpthread.so.0
#2  0x4a2506f9 in _L_mutex_unlock_99 () from /lib/libpthread.so.0
#3  0x4a250370 in __pthread_mutex_unlock_usercnt () from /lib/libpthread.so.0
#4  0x4a2506f0 in pthread_mutex_unlock () from /lib/libpthread.so.0
#5  0xb79fce5a in QWidget::setUpdatesEnabled () from /usr/lib/libxine.so.1
#6  0xb7a4b90b in dvd_plugin_free_buffer (buf=0xb0745470) at input_dvd.c:570
#7  0xb7a030a2 in QWidget::setUpdatesEnabled () from /usr/lib/libxine.so.1
#8  0x4a24d2db in start_thread () from /lib/libpthread.so.0
#9  0x4a05820e in clone () from /lib/libc.so.6

at least the dvd_plugin_free_buffer() call has been resolved now. (I'll 
hunt for the other debuginfo packages too.)

which thread would be the most interesting to you - 9324?

	Ingo
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