linux-kernel - Re: 2.6.24-rc7-rt2

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Message-ID: <Pine.LNX.4.58.0801162106070.19540@gandalf.stny.rr.com>
Date:	Wed, 16 Jan 2008 21:07:36 -0500 (EST)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Mariusz Kozlowski <m.kozlowski@...land.pl>
cc:	LKML <linux-kernel@...r.kernel.org>,
	RT <linux-rt-users@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: 2.6.24-rc7-rt2


On Tue, 15 Jan 2008, Mariusz Kozlowski wrote:
> Ok. It works.
>
> I found this in dmesg:
>
> BUG: swapper:0 task might have lost a preemption check!
> Pid: 0, comm: swapper Not tainted 2.6.24-rc7-rt2 #3
>  [<c010386b>] show_trace_log_lvl+0x1d/0x3b
>  [<c01042f3>] show_trace+0x12/0x14
>  [<c0104a2f>] dump_stack+0x6a/0x70
>  [<c0115419>] preempt_enable_no_resched+0x5c/0x5e

This is really really strange. cpu_idle calls __preempt_enable_no_resched
and not preempt_enable_no_resched (notice the prefixed underscores).
So I don't know how you got that output. Did you get any strance rejects
in applying this patch?

-- Steve


>  [<c0100e35>] cpu_idle+0x6d/0x82
>  [<c0323b6e>] rest_init+0x66/0x68
>  [<c043aba6>] start_kernel+0x20c/0x276
>  [<00000000>] 0x0
>  =======================
> ---------------------------
> | preempt count: 00000000 ]
> | 0-level deep critical section nesting:
> ----------------------------------------
>
> Box runs fine though.
>
> Regards,
>
> 	Mariusz
> -
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