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    SubjectRe: [PATCH v4] sched: automated per session task groups
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    On Sat, 04 Dec 2010 15:01:16 EST, Colin Walters said:

    > Look around...where? On what basis are you making that claim? I did
    > a quick web search for "unix background process", and this tutorial
    > (in the first page of Google search results) aimed at grad students
    > who use Unix at college definitely describes "nice make":
    > http://acs.ucsd.edu/info/jobctrl.shtml

    The fact that something is documented doesn't mean the documentation actually
    is correct.

    There exists a Linux guide written by somebody (who has enough of a rep that
    you can safely say "should have known better") who didn't understand the
    difference between traditional Unix and Linux, nor what the original concept
    was, and it documented the proper way to take a system down quickly as:

    # sync;sync;sync;halt

    Of course, the *original* was:

    # sync
    # sync
    # sync
    # halt

    And the whole point of 3 syncs was that the typing time of the second and third
    sync's chewed up the time till the first sync finished. Of course, sync;sync
    doesn't start the first sync and then make you type. And it overlooked that
    the Linux sync is a lot more synchronous than the ATT Unix sync, which returned
    as soon as the I/O was scheduled, not completed.

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