lkml.org 
[lkml]   [2016]   [May]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [PATCH 2/3] sched,fair: Fix local starvation
    From
    Date
    On Sun, 2016-05-22 at 14:50 +0800, Wanpeng Li wrote:
    > 2016-05-21 22:04 GMT+08:00 Mike Galbraith <mgalbraith@suse.de>:
    > > On Tue, 2016-05-10 at 19:43 +0200, Peter Zijlstra wrote:
    > >
    > > (Evolution authors must either not do patch review, or use some other
    > > mailer. Squint hard, this crud really is your patch;)
    > >
    > > > --- a/kernel/sched/core.c
    > > > +++ b/kernel/sched/core.c
    > > >
    > > > @@ -1762,7 +1770,11 @@ void sched_ttwu_pending(void)
    > > > > > while (llist) {
    > > > > > > p = llist_entry(llist, struct task_struct, wake_entry);
    > > > > > > llist = llist_next(llist);
    > > > -> > > ttwu_do_activate(rq, p, 0, cookie);
    > > > +> > > /*
    > > > +> > > * See ttwu_queue(); we only call ttwu_queue_remote() when
    > > > +> > > * its a x-cpu wakeup.
    > > > +> > > */
    > > > +> > > ttwu_do_activate(rq, p, WF_MIGRATED, cookie);
    > >
    > > Wakees that were not migrated/normalized eat an unwanted min_vruntime,
    >
    > Why there were wakees queued by twu_queue_remote() not migrated?

    Queuing to a remote cache domain implies x-cpu wakeup, but does not
    imply migration.

    -Mike

    \
     
     \ /
      Last update: 2016-05-22 09:41    [W:2.179 / U:0.080 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site