[lkml]   [2011]   [Nov]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 3/3] pids: Make it possible to clone tasks with given pids
    On Fri, Nov 11, 2011 at 08:18:19PM +0400, Pavel Emelyanov wrote:
    > > To add a bit, it's also one of the more *serialized* path. Doing it in
    > > parallel might actually hurt,
    > Can you elaborate on this, please?

    It goes through a lot of locks - tasklist_lock, mmlist_lock, other
    subsys locks depending on CLONE_* options. If you try to do that on
    multiple CPUs in parallel, depending on the level of concurrency,
    contention and extra cacheline bounces may dominate the overhead.



     \ /
      Last update: 2011-11-11 17:25    [W:0.024 / U:17.056 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site