Andreas Bombe wrote:
> > Because it *IS* overcommitment of memory. You can have two processes, each
> > with their 200Mb of data, in a machine with 256Mb RAM+swap, quite happily
> > - until they start writing to it, at which point you discover you have
> > overcommitted your memory, and things go wrong.
>
> He means avoiding overcommit by counting vm requirements but without
> actually copying COW pages (denying a COW allocation if it could not
> be faulted in at a later time). Resulting in vast areas of unused
> RAM.
Just like the mythical internet Quality of Service, you can always find
a use for that non-dedicated capacity... The RAM will never be unused.
It will used by MAP_NORESERVE mappings, processes that specifically said
"I don't mind being overcommitted", and fs cache.
have a nice day,
-- Jamie
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This archive was generated by hypermail 2b29 : Thu Mar 23 2000 - 21:00:21 EST