Date: Sun, 14 Nov 2004 13:38:18 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Gunther Persoons <gunther_persoons@spymac.com>
Cc: linux-kernel@vger.kernel.org, Karsten Wiese <annabellesgarden@yahoo.de>
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.25-1
Message-ID: <20041114123818.GA10772@elte.hu>
References: <20041103105840.GA3992@elte.hu> <20041106155720.GA14950@elte.hu> <20041108091619.GA9897@elte.hu> <20041108165718.GA7741@elte.hu> <20041109160544.GA28242@elte.hu> <20041111144414.GA8881@elte.hu> <20041111215122.GA5885@elte.hu> <41951380.2080801@spymac.com> <20041112201936.GA15133@elte.hu> <419694EC.7090701@spymac.com>
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* Gunther Persoons <gunther_persoons@spymac.com> wrote:

> this bug i got with .26
> wget:12388 BUG: lock held at task exit time!
> [c03ec764] {kernel_sem.lock}
> .. held by:              wget:12388 [c87d2680, 116]
> ... acquired at:  __lock_text_start+0x2c/0x63

i've uploaded .26-1 which has special BKL-debugging code added, which
will (hopefully) pinpoint where the BKL count leaked. (Karsten had
similar problems, with NFS.)

so, could you try .26-1 from the usual place:

    http://redhat.com/~mingo/realtime-preempt/

and make sure you still have CONFIG_RT_DEADLOCK_DETECT enabled. When
this warning message hits next time around it should print some more
info about the place that last acquired the BKL.

	Ingo
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