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| author | Peter Zijlstra <peterz@infradead.org> | 2015-10-09 18:00:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-10-20 10:25:55 +0200 |
| commit | 07f06cb3b5f6bd21374a48dbefdb431d71d53974 (patch) | |
| tree | 80eafc844814f3a7fbc64191e1721a39f59aec37 /kernel/cpu.c | |
| parent | stop_machine: Kill cpu_stop_threads->setup() and cpu_stop_unpark() (diff) | |
| download | linux-07f06cb3b5f6bd21374a48dbefdb431d71d53974.tar.xz linux-07f06cb3b5f6bd21374a48dbefdb431d71d53974.zip | |
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.c | 1 |
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; |