Re: flush_anon_page for MIPS

[Ralf Baechle <ralf@linux-mips.org>]

On Mon, Mar 26, 2007 at 09:33:10AM -0400, Ravi Pratap wrote:

> > >> Thanks so much! Will this go into 2.6.15 by any chance?
> > > 
> > > I don't recall that there every has been such a kernel release ;-)
> > > 
> > > But seriously, 2.6.15 is as dead as Tutankhamun.
> > 
> > Some chip vendors only support that version, so I am assuming 
> > that that was the reason for the question.
> 
> That's correct, actually :-)
> 
> > It is a classic case of what happens when people do ports 
> > that are not merged.  They say it is good enough as is and 
> > then never move forward or fix bugs.
> 
> True, and I don't know why these vendors do it. I wish too that they
> didn't.

Talk to them.  Be prepared to reiterate.

> > The good news I guess is that we have the source, so we could 
> > forward port it if we were really motivated.
> 
> Yes, but isn't it a lot of work considering the lack of a
> flush_anon_page in 2.6.15?

David wrote about forward porting the patches in your vendor kernel
to a more modern kernel.  That would require some work but the
flush_anon_page() thing would be the least of your worries.

Otherwise, you'd need to backport the about following changesets into
your kernel to get flush_anon_page:

03beb07664d768db97bf454ae5c9581cd4737bb4
df7c814ea6385fea8ccf54c80ec78326f78b743e
f036773e8760a79ad9fdeea6665f86d3493d40d1
4c40981a5c0fe1ee5c755a55a4a8e5e3527f0bca

  Ralf