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    SubjectRe: [RFC/PATCH -v2] Add sysfs control to modify a user's cpu share
    On Thu, Oct 04, 2007 at 05:32:17PM -0400, Valdis.Kletnieks@vt.edu wrote:
    > > Shouldn't that be done via uevents? E.g. UID x gets added to the sysfs tree,
    > > generates a uevent and a script then figures out the cpu_share and sets it.
    >
    > That would tend to be a tad racy - a site may want to set limits in the
    > hypothetical /sys/kernel/uids/NNN before the program has a chance to fork-bomb
    > or otherwise make it difficult to set a limitfrom within another userspace

    Note that there is a default limit enforced on every new user (1024
    value for the user's cpu share). This limit should contain any fork-bomb that
    the user may launch immediately.

    > process. It's similar to why you want a process to be launched with all its
    > ulimit's set, rather than set them after the fork/exec happens...





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    Regards,
    vatsa
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