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Date: Wed, 25 Aug 2010 11:59:29 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] Page-fault, switch to secondary mode
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To: Philippe Gerum <rpm@xenomai.org>
Cc: Bharath Achuta Bhat <baambekar@domain.hid>, xenomai@xenomai.org

Philippe Gerum wrote:
> On Wed, 2010-08-25 at 11:12 +0200, Bharath Achuta Bhat wrote:
>> Hello Xenomai experts,
>>
>>
>> I am running a xenomai-2.5.1 patched kernel (v 2.6.30.3) with ipipe
>> version 2.7-06.
>> The target is powerpc (MPC8533E).
>> My application is switching to the secondary mode (I guess because of
>> a page-fault) when ntohl() is called.
>> This is a libc function and I am wondering why only this function
>> (ntohl()) is causing a page-fault.
> 
> What memory are you reading from / writing to in the statement involving
> ntohl()? Is this plain RAM, or mapped I/O memory?

And if it is plain RAM, is it correctly aligned?

-- 
					    Gilles.