Re: copy_one_pte()

From: Andrew Morton
Date: Thu Mar 15 2007 - 15:07:11 EST



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

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