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    SubjectRe: The return of the return of crunch time (2.5 merge candidate list 1.6)
    On Sunday 27 October 2002 09:20, Andrew Pimlott wrote:

    > Example problem case (assuming a fs that stores only seconds, and a
    > make that uses nanoseconds):
    > - I run the "save and build" command while editing foo.c at T = 0.1.
    > - foo.o is built at T = 0.2.
    > - I do some read-only operations on foo.c (eg, checkin), such that
    > foo.o gets flushed but foo.c stays in memory.
    > - I build again. foo.o is reloaded and has timestamp T = 0, and so
    > gets spuriously rebuilt.

    If your system, and your disks, are so fast that they can not only finish the
    build in under a second but can also flush the cache and reload it from disk
    in under a second, then:

    A) the spurious rebuild is still a tiny fraction of a second.
    B) You're seeing a penalty for using a filesystem that's too old for your
    setup. This is a configuration problem in userspace.
    C) How would having ALL times rounded to a second be an improvement?


    -- - Terry Pratchett, Eric Raymond, Pete Abrams, Illiad,
    CmdrTaco, liquid nitrogen ice cream, and caffienated jello. Well why not?
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