From: "Natalie Protasevich" <protasnb@gmail.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled
Date: Wed, 05 Sep 2007 16:01:39 +0000 [thread overview]
Message-ID: <32209efe0709050901u12f64e45ke4af5da56dbc6849@mail.gmail.com> (raw)
In-Reply-To: <200708301338.34246.protasnb@gmail.com>
On 9/5/07, David Mosberger-Tang <dmosberger@gmail.com> wrote:
> 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
This is actually a feature. Can be a workaround for platform that
didn't manage to make ptcg work, but can be intentionally disabled by
design. Big modular scaled out systems may choose to disable it
intentionally. I think it's more of feature implementation, which is
offered by architecture and has found some users, so I'd say this
might stay and not be short-lived. In this case, will machvec be more
appropriate?
Thanks,
--Natalie
>
> On 9/5/07, Natalie Protasevich <protasnb@gmail.com> wrote:
> > On 9/5/07, Robin Holt <holt@sgi.com> 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
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
> >
>
>
> --
> Mosberger Consulting LLC, http://www.mosberger-consulting.com/
>
next prev parent reply other threads:[~2007-09-05 16:01 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-30 20:38 [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled Natalie Protasevich
2007-08-31 1:15 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be Zou Nan hai
2007-08-31 1:45 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to bedisabled Luck, Tony
2007-08-31 1:48 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to Zou Nan hai
2007-09-03 8:06 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to bedisabled Natalie Protasevich
2007-09-03 8:06 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled - take 2 Natalie Protasevich
2007-09-03 9:21 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled Jes Sorensen
2007-09-03 9:37 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled - take 2 Jes Sorensen
2007-09-04 8:46 ` Robin Holt
2007-09-04 9:03 ` Luck, Tony
2007-09-04 14:58 ` Natalie Protasevich
2007-09-04 16:05 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled Natalie Protasevich
2007-09-04 19:59 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled - take 2 Bjorn Helgaas
2007-09-04 21:20 ` Natalie Protasevich
2007-09-05 13:35 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be Jes Sorensen
2007-09-05 13:57 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled Robin Holt
2007-09-05 15:29 ` Natalie Protasevich
2007-09-05 15:47 ` David Mosberger-Tang
2007-09-05 16:01 ` Natalie Protasevich [this message]
2007-09-06 16:36 ` David Mosberger-Tang
2007-09-06 18:00 ` Natalie Protasevich
2007-09-07 7:38 ` Luck, Tony
2007-09-07 8:38 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be Jes Sorensen
2007-09-07 16:11 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled Bjorn Helgaas
2007-09-07 16:25 ` Natalie Protasevich
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