[Gllug] 2 quick questions

[John Hearns]

On Tue, 2002-06-11 at 16:11, Peter Andersen wrote:
> 
> Anyone know......
> 
> What is a Mutex?
> 
> &
> 
> What happens if a major page fault occurs?
> 

Stupid, blue-skies question as usual.
And as usual betraying my ignorance.

Discussing earlier this morning about setting user limits -
mainly to prevent programs being run which start to cause seriously
bad swapping. 
The above question made a rather old and dusty synapse fire in my brain.

Anyone care to comment on usefulness/fun/
bloody mindedness of running an old-style real memory system?
I don't mean for an embedded device or anything - let's say for
a desktop machine. Let's say we put 4 gigs of RAM in it.
Any advantages there by not having virtual memory (well, other than
the lack of swapping).
'Spose we might all have to start programming in FORTRAN though...


Actually, some quick Googling has just reminded me, IIRC, that
Crays didn't use virtual memory. Swapping - that's not for Real Men(TM).
Just buy some more memory from Uncle Seymour.



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