lkml.org 
[lkml]   [2016]   [Oct]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [rfc patch] hotplug: Call mmdrop_delayed() in sched_cpu_dying() if PREEMPT_RT_FULL
On 2016-10-20 11:34:03 [+0200], Mike Galbraith wrote:
> My 64 core box just passed an hour running Steven's hotplug stress
> script along with stockfish and futextests (tip-rt.today w. hotplug
> hacks you saw a while back), and seems content to just keep on grinding
> away. Without it, box quickly becomes a doorstop.

This is new. It is v4.7-rc1 new. The hotplug rework moved the notified
around and after

e9cd8fa4fcfd ("sched/migration: Move calc_load_migrate() into CPU_DYING")
f2785ddb5367 ("sched/hotplug: Move migration CPU_DYING to sched_cpu_dying()")

we have no more CPU_DEAD, just CPU_DYING which is invoked with
interrupts off. I don't see anything wrong with pushing this over to
RCU.

Sebastian

\
 
 \ /
  Last update: 2016-10-20 13:22    [W:0.224 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site