[lkml]   [2010]   [Dec]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH v4] sched: automated per session task groups
    On Sat, Dec 4, 2010 at 5:39 PM, Linus Torvalds
    <> wrote:

    > And it doesn't hurt you. If you're happy with "nice", go on and use
    > it. Why are you even discussing it?

    Because it seems to me like a bug if it isn't as good as group
    scheduling? Most of your message is saying it's worthless, and I
    don't disagree that it's not very good *right now*. I guess where we
    disagree is whether it's worth fixing.

    > What's your point again? It's a heuristic.

    So if it's a heuristic the OS can get wrong, wouldn't it be a good
    idea to support a way for programs and/or interactive users to
    explicitly specify things? Unfortunately the cgroups utilities don't
    make this easy (and of course there's the issue that no major released
    OS exports write permission to the cpu cgroup for a desktop session
    uid). I guess "nice" could be patched to, if the user has permission
    to the cgroups, to auto-create a group. Or...nice could be fixed.

    On a more productive note, I see now
    Documentation/scheduler/sched-nice-design.txt has a lot of really
    useful history regarding "nice" and the complaints over time (I guess
    this is where some of your assertions that it's failed/worthless comes

     \ /
      Last update: 2010-12-05 00:47    [W:0.029 / U:0.704 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site