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    SubjectRe: Memory overcommitting (was Re: http://www.redhat.com/redhat/)
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    Tuukka Toivonen <tuukkat@stekt.oulu.fi> writes:

    > As I have understand, Linux returns ALWAYS success when using malloc(),
    > because only reason why malloc() would fail, is memory overrun, and this
    > will never happen in malloc().

    That's wrong. Linux (since 2.0.x, 1.2.x didn't) uses a simple heuristic
    to find out if enough memory is available. The other possibility is when
    you run into your rlimits.

    I really wish people would check the facts before posting.

    overcom.c:
    #include <stdlib.h>
    main()
    {
    void *p;
    p = malloc(1024 * 1024 * 1024); /* allocate 1GB */

    printf("p = %p\n", p);
    }


    % ulimit -v
    (unlimited)
    % gcc -o overcom overcom.c
    % ./overcom
    (nil)
    %

    -Andi

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