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Subject[PATCH -v2 05/17] workqueue: Manually break affinity on hotplug
Don't rely on the scheduler to force break affinity for us -- it will
stop doing that for per-cpu-kthreads.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
kernel/workqueue.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -4905,6 +4905,10 @@ static void unbind_workers(int cpu)
pool->flags |= POOL_DISASSOCIATED;

raw_spin_unlock_irq(&pool->lock);
+
+ for_each_pool_worker(worker, pool)
+ WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task, cpu_active_mask) < 0);
+
mutex_unlock(&wq_pool_attach_mutex);

/*

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