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    SubjectRe: [lockup] Re: objrmap-core-1 (rmap removal for file mappings to avoid 4:4 in <=16G machines)

    * Andrea Arcangeli <andrea@suse.de> wrote:

    > > or run the attached test-mmap2.c code, which simulates a very small DB
    > > app using only 1800 vmas per process: it only maps 8 MB of shm and
    > > spawns 32 processes. This has an even more lethal effect than the
    > > previous code.
    >
    > this use more cpu than the previous one, but no other differences.

    how fast is the system you tried this on? If it's faster than the 500
    MHz box i tried it on then please try the attached test-mmap3.c. (which
    is still not doing anything extreme.)

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