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Re: Kernel crash in 2.6.32.6 / bcm1480 with 16k page size

To: David Daney <ddaney@caviumnetworks.com>
Subject: Re: Kernel crash in 2.6.32.6 / bcm1480 with 16k page size
From: Guenter Roeck <guenter.roeck@ericsson.com>
Date: Fri, 29 Jan 2010 11:58:01 -0800
Cc: Ralf Baechle <ralf@linux-mips.org>, "linux-mips@linux-mips.org" <linux-mips@linux-mips.org>
In-reply-to: <4B6336F1.8070208@caviumnetworks.com>
References: <20100128155514.GA31611@ericsson.com> <20100129132406.GD5685@linux-mips.org> <20100129151220.GA3882@ericsson.com> <4B6316D2.1060006@caviumnetworks.com> <20100129180619.GA20113@linux-mips.org> <20100129183926.GB9895@ericsson.com> <4B632F60.4000604@caviumnetworks.com> <20100129192532.GA11123@ericsson.com> <4B6336F1.8070208@caviumnetworks.com>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.18 (2008-05-17)
On Fri, Jan 29, 2010 at 02:28:49PM -0500, David Daney wrote:
...
> 
> I suspect you are hitting a maximum valid address bits limit and getting 
> the Address Exception.  Limiting VMALLOC_END so that you don't hit the 
> limit seems to be the solution.  I don't have the manual for the sibyte, 
> so I don't know what the limit is.  The architecture specification 
> doesn't state a fixed limit, although it tells what should happen when 
> the limit is reached.
> 
You mean there might be a CPU-specific limit ? I hope not - that would be quite 
messy.

I'll see if I can dig up a sibyte manual.

Guenter

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