linux-kernel - Re: copy_one

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Message-Id: <20070315110634.a2d08dce.akpm@linux-foundation.org>
Date:	Thu, 15 Mar 2007 11:06:34 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Matt Keenan <tank.en.mate@...il.com>
Cc:	linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>
Subject: Re: copy_one_pte()


(cc restored.  Please always do reply-to-all).

> On Wed, 14 Mar 2007 08:35:07 +0000 Matt Keenan <tank.en.mate@...il.com> wrote:
> 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.

Oh Dear.

Which vendor's kernel are we talking about here?
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