Re: Preserving memory...

Re: Preserving memory...

[Iain Sandoe]

> On Tue, 11 Apr 2000, Josh Huber wrote:
>> First, is there a way to tell powerpc hardware (Macs in particular -- for
>> now) to preserve memory across a system restart?  It looks like it does this
>> by default, partially.
>>
>> Secondly, if I can get the first part to work reliably, does anyone know
>> what regions of memory should be avoided, i.e. are thrashed by OF etc?
>
> At least on the LongTrail, all memory is cleared by OF (at least it looks like
> that).

The macs have the OF #MEGS variable - so you should be able to control it -
it seems to work on the 9500.

I think that the trashed area is from the start.
Iain.

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Preserving memory...

[Josh Huber]

Hey, I'm working to get some in-memory crash dump kernel patches, and I've
run into some problems.  I've got a couple of questions that I hope someone
can answer for me:

First, is there a way to tell powerpc hardware (Macs in particular -- for
now) to preserve memory across a system restart?  It looks like it does this
by default, partially.

Secondly, if I can get the first part to work reliably, does anyone know
what regions of memory should be avoided, i.e. are thrashed by OF etc?

Thanks,
Josh

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Re: Preserving memory...

[Geert Uytterhoeven]

On Tue, 11 Apr 2000, Josh Huber wrote:
> First, is there a way to tell powerpc hardware (Macs in particular -- for
> now) to preserve memory across a system restart?  It looks like it does this
> by default, partially.
>
> Secondly, if I can get the first part to work reliably, does anyone know
> what regions of memory should be avoided, i.e. are thrashed by OF etc?

At least on the LongTrail, all memory is cleared by OF (at least it looks like
that).

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- Linux/{m68k~Amiga,PPC~CHRP} -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds


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