From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <017201c14a77$5ac79f00$a2b9c6d4@SOMA>
From: "Boyd Roberts" <boyd@fr.inter.net>
To: <9fans@cse.psu.edu>
References: <20011001122432.618F119AD4@mail.cse.psu.edu>
Subject: Re: [9fans] authorization schemes (was CORBA)
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Date: Mon,  1 Oct 2001 14:48:22 +0200
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> I remember John Reiser struggling with it for 32V.
> I believe he eventually conquered it, but it wasn't
> easy

i know (his?) 32V non-COW MMU code on the 780 pretty well.

lots of 128's scattered everywhere and that allocated on the
fly bitmap to the SPT, but not zeroed.  the 780 zeroed the
first 64kb, should the pages grabbed for the bitmap be > 64kb
you had a bunch of weird panics and la-120 stack backtraces
all over the place ...