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authorPeter Zijlstra <peterz@infradead.org>2015-10-09 18:00:54 +0200
committerIngo Molnar <mingo@kernel.org>2015-10-20 10:25:55 +0200
commit07f06cb3b5f6bd21374a48dbefdb431d71d53974 (patch)
tree80eafc844814f3a7fbc64191e1721a39f59aec37 /kernel/cpu.c
parentf0cf16cbd0659d2dd21352da9f06f3fab7a51596 (diff)
sched: Start stopper early
Ensure the stopper thread is active 'early', because the load balancer pretty much assumes that its available. And when 'online && active' the load-balancer is fully available. Not only the numa balancing stop_two_cpus() caller relies on it, but also the self migration stuff does, and at CPU_ONLINE time the cpu really is 'free' to run anything. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: heiko.carstens@de.ibm.com Link: http://lkml.kernel.org/r/20151009160054.GA10176@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/cpu.c')
-rw-r--r--kernel/cpu.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 6467521e1e15..c85df2775b73 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -475,7 +475,6 @@ static int smpboot_thread_call(struct notifier_block *nfb,
case CPU_DOWN_FAILED:
case CPU_ONLINE:
- stop_machine_unpark(cpu);
smpboot_unpark_threads(cpu);
break;