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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: Ralf Baechle <ralf@linux-mips.org>
Date: Fri, 29 Jan 2010 19:06:20 +0100
Cc: Guenter Roeck <guenter.roeck@ericsson.com>, "linux-mips@linux-mips.org" <linux-mips@linux-mips.org>
In-reply-to: <4B6316D2.1060006@caviumnetworks.com>
References: <20100128155514.GA31611@ericsson.com> <20100129132406.GD5685@linux-mips.org> <20100129151220.GA3882@ericsson.com> <4B6316D2.1060006@caviumnetworks.com>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.20 (2009-08-17)
On Fri, Jan 29, 2010 at 09:11:46AM -0800, David Daney wrote:

> >So first question would be: Has anyone successfully loaded a 64
> >bit mips kernel with 2.6.32 and a page size of 16k or 64k ? This
> >would at least help me reducing the problem to sb1.
> 
> Yes, I routinely run with both 64K and 16K page sizes on 2.6.32 and
> 2.6.33-rc*.  I have not seen any crashes that can not be easily
> explained.

I can reproduce it with today's 14b7baff3eb4b1b46a592630e6f85ded9264798a.
4K page size works ok, 16K without IPv6 works ok and 16K with IPv6 crashes.
Note, I was testing with a non-16K capable userland so ok means userland is
reached.

Either way, that's good enought to look into things.

  Ralf

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