linux-kernel - Re: hpwdt oops in clflush_cache

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Message-ID: <alpine.LFD.1.00.0802271913050.7583@apollo.tec.linutronix.de>
Date:	Wed, 27 Feb 2008 19:14:40 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Roland Dreier <rdreier@...co.com>
cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Thomas Mingarelli <thomas.mingarelli@...com>
Subject: Re: hpwdt oops in clflush_cache_range

On Wed, 27 Feb 2008, Roland Dreier wrote:
> With an up-to-date git tree (head 7704a8b6) I'm seeing the oops below
> when the hpwdt driver gets loaded during boot on an HP DL380 system.
> I don't think I've seen any previous reports of this, and I guess it
> doesn't really count as a regression since the hpwdt driver was only
> added after 2.6.25-rc2.
> 
> I haven't tried to debug this at all yet but any guidance about what
> information is useful for what looks to be an issue with c_p_a would
> be appreciated.
> 
>  BUG: unable to handle kernel paging request at ffffc20001a08000
>  IP: [<ffffffff8021dacc>] clflush_cache_range+0xc/0x25
>  PGD 1bf80e067 PUD 1bf80f067 PMD 1bb1ab067 PTE 80000047000ee17b

-------------------------------------------------^^^^^^^^^^^^^^^^

The physical address looks strange: 0x47000EE000

Can you provide a full boot log please ?

Thanks,
	tglx
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