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Date: Tue, 02 Nov 2004 01:22:10 +0100
From: Michal Schmidt <xschmi00@stud.feec.vutbr.cz>
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To: Ingo Molnar <mingo@elte.hu>
CC: Florian Schmidt <mista.tapas@gmx.net>, Lee Revell <rlrevell@joe-job.com>,
       Paul Davis <paul@linuxaudiosystems.com>,
       Thomas Gleixner <tglx@linutronix.de>,
       LKML <linux-kernel@vger.kernel.org>, mark_h_johnson@raytheon.com,
       Bill Huey <bhuey@lnxw.com>, Adam Heath <doogie@debian.org>,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.stanford.edu>,
       Karsten Wiese <annabellesgarden@yahoo.de>,
       jackit-devel <jackit-devel@lists.sourceforge.net>,
       Rui Nuno Capela <rncbc@rncbc.org>, "K.R. Foley" <kr@cybsft.com>
Subject: Re: [Fwd: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4]
References: <20041031120721.GA19450@elte.hu> <20041031124828.GA22008@elte.hu> <1099227269.1459.45.camel@krustophenia.net> <20041031131318.GA23437@elte.hu> <20041031134016.GA24645@elte.hu> <20041031162059.1a3dd9eb@mango.fruits.de> <20041031165913.2d0ad21e@mango.fruits.de> <20041031200621.212ee044@mango.fruits.de> <20041101134235.GA18009@elte.hu> <20041101135358.GA19718@elte.hu> <20041101140630.GA20448@elte.hu>
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Hi,

This is after "modprobe -r uhci-hcd" on -V0.6.5:

BUG: sleeping function called from invalid context rmmod(5093) at 
kernel/mutex.c:30
in_atomic():1 [00000001], irqs_disabled():1
  [<c01060d3>] dump_stack+0x23/0x30 (20)
  [<c011b2e2>] __might_sleep+0xc2/0xe0 (36)
  [<c0134d78>] __mutex_lock+0x38/0x50 (24)
  [<c0134dad>] _mutex_lock+0x1d/0x20 (16)
  [<c01482c4>] do_drain+0x24/0x60 (32)
  [<c0148269>] smp_call_function_all_cpus+0x29/0x60 (28)
  [<c0148327>] drain_cpu_caches+0x27/0x60 (28)
  [<c014837c>] __cache_shrink+0x1c/0x100 (36)
  [<c014855d>] kmem_cache_destroy+0x9d/0x190 (28)
  [<f8a40e24>] uhci_hcd_cleanup+0x24/0x67 [uhci_hcd] (16)
  [<c0138c40>] sys_delete_module+0x120/0x150 (96)
  [<c0105293>] syscall_call+0x7/0xb (-8124)
---------------------------
| preempt count: 00000002 ]
| 2-level deep critical section nesting:
----------------------------------------
.. [<c0148263>] .... smp_call_function_all_cpus+0x23/0x60
.....[<c0148327>] ..   ( <= drain_cpu_caches+0x27/0x60)
.. [<c0136b0d>] .... print_traces+0x1d/0x90
.....[<c01060d3>] ..   ( <= dump_stack+0x23/0x30)


Michal
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