[LispM-Hackers] Do we need a read barrier to support e3 GC?

[John Morrison]

Hi;

As near as I can tell, unless I muck about with non-privileged segments
(which I am not currently doing -- I currently have only one segment),
the standard intel architecture MMU does not support read-denied pages
(although I can probably fake it by pretending the page is not mapped
and doing more work).  Does anybody knowledgeable about the E2 GC know
whether the GC depends upon a read barrier?

Thanks,

-jm

-- 
==== John Morrison
==== MAK Technologies Inc.
==== 185 Alewife Brook Parkway, Cambridge, MA 02138
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