Commit 06249738 authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

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: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarValentin Schneider <valentin.schneider@arm.com>
Acked-by: default avatarTejun Heo <tj@kernel.org>
Reviewed-by: default avatarDaniel Bristot de Oliveira <bristot@redhat.com>
Link: https://lkml.kernel.org/r/20201023102346.464718669@infradead.org
parent f2469a1f

kernel/workqueue.c

+4 −0
Original line number Diff line number Diff line
@@ -4908,6 +4908,10 @@ 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);



		/*