[lkml]   [2002]   [Feb]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [Lse-tech] Re: [PATCH] O(1) scheduler set_cpus_allowed for non-current tasks
    Hi all,

    On Wed, 20 Feb 2002 17:12:21 -0800
    Paul Jackson <> wrote:

    > > Another problem is the right moment to change the cpu field of the
    > > task. ... The IPI to the target CPU is the same as in the
    > > initial design of Ingo. It has to wait for the task to unschedule and
    > > knows it will find it dequeued.
    > How about not changing anything of the target task synchronously,
    > except for some new "proposed_cpus_allowed" field. Set that
    > field and get out of there. Let the target process run the
    > set_cpus_allowed() routine on itself, next time it passes through
    > the schedule() code. Leave it the case that the set_cpus_allowed()
    > routine can only be run on the current process.
    > Perhaps others need this cpus_allowed change (and the migration
    > of a task to a different allowed cpu) to happen "right away".
    > But I don't, and I don't (yet) know that anyone else does.

    CPU hotplug needs to change cpus_allowed in definite time.
    When a process is sleeping for 100000 seconds, how can we offline
    a CPU the process belongs?


    Kimio Suganuma <>

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:24    [W:0.024 / U:0.956 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site