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    SubjectRe: Memory intensive processes

    > > This is true. Also the act of READING zero-filled pages should not cause
    > > a trap to the operating system. Many FFTs null-fill a lot of RAM and
    > > certainly never write to it.
    > Not a good idea. Implementing your suggestion would mean that large parts
    > the page tables which are are just truncated off would have to be allocated
    > and memory. Just mmaping 1gb from /dev/zero would cost you over 1mb of
    > *not swappable* memory for page tables. Aside of that allocation and filling
    > consumes a lot of time.

    a very good idea since page tables are in virtual memory and swappable
    themself in VMS...

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