Re: [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled

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In my opinion, machvec is a bad idea for a temporary workaround.
You'll need to create new header files etc etc all just for a
short-lived workaround.  Just my 2 cents.

  --david

On 9/5/07, Natalie Protasevich <protasnb@xxxxxxxxx> wrote:
> On 9/5/07, Robin Holt <holt@xxxxxxx> wrote:
> > > No :) those interested are big hardware makers of large scaled out
> > > boxes, such as HP, UIS. They are using own asics and are not
> > > necessarily being able to keep chipset native capabilities intact. As
> > > I said in the preamble, the mechanism has to be there so they can turn
> > > the ptc.g off and run the OS.
> >
> > This really sounds like it is best done as a machvec.  Currently, Altix
> > (sn2) does not have a ptc.g that spans nodes.  We have our own tlb purge
> > mechanism which is very flexible and scalable.  Maybe it would be best
> > to follow that example.  To repeat Bjorn's comments, this area can be
> > fraught with _VERY_ difficult to diagnose problems.  A boot test can
> > hardly be expected to uncover all the races so be patient while we walk
> > through this code.
> >
> All right, all right ... :) I'll do the machvec then. Thanks guys,
> will peek into the sn2 to get an idea.
>
> Regards,
> --Natalie
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