Date: Tue, 25 Sep 2001 12:24:17 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: Mike Silbersack <silby@silby.com> Cc: Ian Dowse <iedowse@maths.tcd.ie>, <hackers@freebsd.org> Subject: Re: VM Corruption - stumped, anyone have any ideas? Message-ID: <200109251924.f8PJOHW03718@earth.backplane.com> References: <20010924213518.G70783-100000@achilles.silby.com>
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:Ok, time to take a good stab at sticking my foot in my mouth here.
:
:Would it be possible to have a kernel mode where the read-only bit was
:turned on for malloc pools which shouldn't currently be accessed? This
:could be gated through the spl() calls (or specific mutexes on -current),
:ensuring that something like getpid couldn't stomp on the vm structures
:w/o first doing a splvm().
Kinda sounds like Multics :-)... no, it would be too messy trying
to protect kernel structures in one subsystem from another.
-Matt
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