linux-kernel - Re: copy_one

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Date:	Wed, 14 Mar 2007 08:35:07 +0000
From:	Matt Keenan <tank.en.mate@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: copy_one_pte()

Christoph Hellwig wrote:
> On Tue, Mar 13, 2007 at 08:15:25PM +0100, Zoltan Menyhart wrote:
>   
>> I had a look at copy_one_pte().
>> I cannot see any ioproc_update_page() call, not even for the COW pages.
>> Is it intentional?
>>     
>
> There is no such thing as ioproc_update_page in any mainline tree.
> You must be looking at some vendor tree with braindead patches applied.
>
>   
It looks like this function exists as a part of patches to support 
Quadrics NICs / RDMA (HPC platforms).  The patches are there so the 
driver doesn't need to pin pages, it can be informed of page updates 
directly.  A patch was submitted to l-k sometime in 2005.

Matt
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