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Subject: Re: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U9
From: Thomas Gleixner <tglx@linutronix.de>
Reply-To: tglx@linutronix.de
To: "K.R. Foley" <kr@cybsft.com>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <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>, Florian Schmidt <mista.tapas@gmx.net>,
       Michal Schmidt <xschmi00@stud.feec.vutbr.cz>,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>
In-Reply-To: <4177FADC.6030905@cybsft.com>
References: <20041013061518.GA1083@elte.hu> <20041014002433.GA19399@elte.hu>
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	 <20041019180059.GA23113@elte.hu> <20041020094508.GA29080@elte.hu>
	 <20041021132717.GA29153@elte.hu>  <4177FADC.6030905@cybsft.com>
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Date: Thu, 21 Oct 2004 20:40:16 +0200
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On Thu, 2004-10-21 at 20:07, K.R. Foley wrote:
> Ingo Molnar wrote:
> > i have released the -U9 Real-Time Preemption patch, which can be
> > downloaded from:
> > 
> >   http://redhat.com/~mingo/realtime-preempt/
> > 
> 
> Finally a patch that I can get booted on my older SMP system at home 
> again. More correctly it is U9.2. I have been having problems with these 
> hanging after U5. Haven't had a ton of time to try to track down the 
> problems and didn't want to report problems without having done enough 
> troubleshooting. Anyway, I got this while booting U9.2.

I guess, you don't have a tulip network card in your box, as the module
is removed.

The question is, if it got registered correctly before the removal.

tglx

> Oct 21 12:33:22 porky kernel: BUG: atomic counter underflow at:
> Oct 21 12:33:22 porky kernel:  [<c0254dd8>] qdisc_destroy+0x98/0xa0 (12)
> Oct 21 12:33:22 porky kernel:  [<c0254fed>] dev_shutdown+0x3d/0xa0 (16)
> Oct 21 12:33:22 porky kernel:  [<c024773b>] unregister_netdevice+0x13b/0x280 (28)
> Oct 21 12:33:22 porky netfs: Mounting other filesystems:  succeeded
> Oct 21 12:33:22 porky kernel:  [<c0112fb0>] mcount+0x14/0x18 (12)
> Oct 21 12:33:22 porky kernel:  [<e09a6160>] tulip_remove_one+0x0/0xa0 [tulip] (4)
> Oct 21 12:33:22 porky kernel:  [<c02058de>] unregister_netdev+0x1e/0x30 (24)
> Oct 21 12:33:22 porky kernel:  [<e09a618f>] tulip_remove_one+0x2f/0xa0 [tulip] (16)
> Oct 21 12:33:22 porky kernel:  [<c01f2907>] device_release_driver+0x67/0x70 (8)
> Oct 21 12:33:22 porky kernel:  [<c0112fb0>] mcount+0x14/0x18 (8)
> Oct 21 12:33:22 porky kernel:  [<c01c4e26>] pci_device_remove+0x76/0x80 (20)
> Oct 21 12:33:22 porky kernel:  [<c01f573b>] device_detach_shutdown+0xb/0x40 (12)
> Oct 21 12:33:22 porky kernel:  [<c01f2907>] device_release_driver+0x67/0x70 (12)
> Oct 21 12:33:22 porky kernel:  [<c01f293b>] driver_detach+0x2b/0x40 (24)
> Oct 21 12:33:22 porky kernel:  [<c01f2daf>] bus_remove_driver+0x3f/0x70 (20)
> Oct 21 12:33:22 porky kernel:  [<c01f32b9>] driver_unregister+0x19/0x30 (20)
> Oct 21 12:33:22 porky kernel:  [<c01c50cc>] pci_unregister_driver+0x1c/0x30 (16)
> Oct 21 12:33:22 porky kernel:  [<e09a7767>] tulip_cleanup+0x17/0x1b [tulip] (16)
> Oct 21 12:33:22 porky kernel:  [<c0139801>] sys_delete_module+0x121/0x150 (12)
> Oct 21 12:33:22 porky kernel:  [<c01531a1>] sys_munmap+0x51/0x60 (64)
> Oct 21 12:33:22 porky kernel:  [<c0116a20>] do_page_fault+0x0/0x660 (16)
> Oct 21 12:33:22 porky kernel:  [<c0106719>] sysenter_past_esp+0x52/0x71 (16)
> Oct 21 12:33:22 porky kernel: preempt count: 00000001
> Oct 21 12:33:22 porky kernel: . 1-level deep critical section nesting:
> Oct 21 12:33:22 porky kernel: .. entry 1: print_traces+0x1d/0x60 / (dump_stack+0x23/0x30)
> Oct 21 12:33:22 porky kernel: 
> Oct 21 12:33:22 porky kernel: tulip 0000:04:0a.0: Device was removed without properly calling pci_disable_device(). This may need fixing.

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