Re: Low memory problems in 8xx Linux

Jesper Skov wrote:

<snip>

I read the patch and think I understand what's going on, but I don't
see where the GUARDED bits comes in. Maybe I'm missing some subtlety
from other patches (cllf?) and should not use the code at all. I'd
better back it out.

Jesper

Apologies for being vague. I have a head-cold and my brain seems to be
on vacation. :(

The guarded flag doesn't appear in the patch but in

cllf-2.2.13/arch/ppc/kernel/head.S
(from Dan's distribution for the Classic Lite Low Fat board)

near where the head.S-patch is applied.

Somewhere in the DataStoreTLBMiss routine, I think, you'll see the comment:

/* Insert the Guarded flag into the TWC from the Linux PTE.
<snip>
*/

This is one of the areas where cllf-2.2.13 differs from mpc8xx-2.2.13.

HTH,

PeterA.

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