Revision 547a77d02f8cfb345631ce23b5b548d27afa0fc4 authored by Lai Jiangshan on 11 January 2021, 15:26:33 UTC, committed by Peter Zijlstra on 22 January 2021, 14:09:41 UTC
The scheduler won't break affinity for us any more, and we should "emulate" the same behavior when the scheduler breaks affinity for us. The behavior is "changing the cpumask to cpu_possible_mask". And there might be some other CPUs online later while the worker is still running with the pending work items. The worker should be allowed to use the later online CPUs as before and process the work items ASAP. If we use cpu_active_mask here, we can't achieve this goal but using cpu_possible_mask can. Fixes: 06249738a41a ("workqueue: Manually break affinity on hotplug") Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Valentin Schneider <valentin.schneider@arm.com> Acked-by: Tejun Heo <tj@kernel.org> Tested-by: Paul E. McKenney <paulmck@kernel.org> Tested-by: Valentin Schneider <valentin.schneider@arm.com> Link: https://lkml.kernel.org/r/20210111152638.2417-4-jiangshanlai@gmail.com
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.cocciconfig
[spatch]
options = --timeout 200
options = --use-gitgrep
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