If the nohz_full is enabled, when the boost task be created, the cpus_allowed_ptr be set housekeeping_cpumask(HK_FLAG_KTHREAD), however when the rcu_boost_kthread_setaffinity() be called, the original affinity will be changed, the isolated cpus should be considered again. Signed-off-by: Zqiang <qiang.zhang1211@xxxxxxxxx> --- kernel/rcu/tree_plugin.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 5199559fbbf0..87e7ebbdb12e 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -1204,8 +1204,9 @@ static void rcu_boost_kthread_setaffinity(struct rcu_node *rnp, int outgoingcpu) if ((mask & leaf_node_cpu_bit(rnp, cpu)) && cpu != outgoingcpu) cpumask_set_cpu(cpu, cm); + cpumask_and(cm, cm, housekeeping_cpumask(HK_FLAG_RCU)); if (cpumask_weight(cm) == 0) - cpumask_setall(cm); + cpumask_copy(cm, housekeeping_cpumask(HK_FLAG_RCU)); set_cpus_allowed_ptr(t, cm); free_cpumask_var(cm); } -- 2.17.1
