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Message-ID: <417D2D8F.8080904@cybsft.com>
Date: Mon, 25 Oct 2004 11:45:03 -0500
From: "K.R. Foley" <kr@cybsft.com>
Organization: Cybersoft Solutions, Inc.
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To: Florian Schmidt <mista.tapas@gmx.net>
CC: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org,
       Lee Revell <rlrevell@joe-job.com>, Rui Nuno Capela <rncbc@rncbc.org>,
       Mark_H_Johnson@Raytheon.com, Bill Huey <bhuey@lnxw.com>,
       Adam Heath <doogie@debian.org>, Thomas Gleixner <tglx@linutronix.de>,
       Michal Schmidt <xschmi00@stud.feec.vutbr.cz>,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
       Alexander Batyrshin <abatyrshin@ru.mvista.com>
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0
References: <20041022133551.GA6954@elte.hu>	<20041022155048.GA16240@elte.hu>	<20041022175633.GA1864@elte.hu>	<20041025104023.GA1960@elte.hu>	<417CDE90.6040201@cybsft.com>	<20041025111046.GA3630@elte.hu>	<20041025121210.GA6555@elte.hu>	<20041025152458.3e62120a@mango.fruits.de>	<20041025132605.GA9516@elte.hu>	<20041025160330.394e9071@mango.fruits.de>	<20041025141008.GA13512@elte.hu> <20041025170612.6284923a@mango.fruits.de>
In-Reply-To: <20041025170612.6284923a@mango.fruits.de>
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Florian Schmidt wrote:
> On Mon, 25 Oct 2004 16:10:08 +0200
> Ingo Molnar <mingo@elte.hu> wrote:
> 
> 
>>>Btw: i still experience some "pauses". They are different now though.
>>>It seems i can trigger them by reloading a page in mozilla (not
>>>always). This BUG definetly looks related. Dunno, when exactly it
>>>happened (related to what i did at that moment), but it's the only one
>>>in dmesg output on this bootup. Each of the pauses is accompanied by a
>>>high cpu usage of ksoftirqd. I cannot retrigger the BUG though.
>>
>>please try -V0.2 - maybe the delayed-put fix is somehow related. (but
>>only maybe...)
>>
> 
> 
> doesn't seem so. V0.2 doesn't fix this for me. This time i got a BUG storm
> again in syslog (it kinda seems related to starting playback in xmms plus
> loading pages in mozilla. will boot again to verify):
> 

Well I have now gotten a couple of these now too (with V0.2). They all 
seem to be generated by firefox or thunderbird and the traces are all 
identical except for the offending process.


Oct 25 11:22:11 swdev14 kernel:
Oct 25 11:22:20 swdev14 kernel: thunderbird-bin/3946: BUG in futex_wait 
at kernel/futex.c:542
Oct 25 11:22:20 swdev14 kernel:  [<c0136389>] futex_wait+0x192/0x19c (12)
Oct 25 11:22:20 swdev14 kernel:  [<c0135646>] 
sub_preempt_count+0x75/0xd8 (72)
Oct 25 11:22:20 swdev14 kernel:  [<c02aa9f2>] _spin_unlock+0x1a/0x34 (4)
Oct 25 11:22:20 swdev14 kernel:  [<c02aa9f2>] _spin_unlock+0x1a/0x34 (84)
Oct 25 11:22:20 swdev14 kernel:  [<c01120ac>] mcount+0x14/0x18 (4)
Oct 25 11:22:20 swdev14 kernel:  [<c02aa9f2>] _spin_unlock+0x1a/0x34 (20)
Oct 25 11:22:20 swdev14 kernel:  [<c0118e15>] 
default_wake_function+0x0/0x1c (60)
Oct 25 11:22:20 swdev14 kernel:  [<c0118e15>] 
default_wake_function+0x0/0x1c (32)
Oct 25 11:22:20 swdev14 kernel:  [<c0136777>] sys_futex+0xf0/0xfc (12)
Oct 25 11:22:20 swdev14 kernel:  [<c01120ac>] mcount+0x14/0x18 (8)
Oct 25 11:22:20 swdev14 kernel:  [<c0136637>] do_futex+0x47/0x97 (20)
Oct 25 11:22:20 swdev14 kernel:  [<c0136777>] sys_futex+0xf0/0xfc (40)
Oct 25 11:22:20 swdev14 kernel:  [<c010623d>] 
sysenter_past_esp+0x52/0x71 (68)
Oct 25 11:22:20 swdev14 kernel: preempt count: 00000001
Oct 25 11:22:20 swdev14 kernel: . 1-level deep critical section nesting:
Oct 25 11:22:20 swdev14 kernel: .. entry 1: print_traces+0x1d/0x59 
[<c0135a28>] / (dump_stack+0x23/0x27 [<c01070db>])
Oct 25 11:22:20 swdev14 kernel:

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