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Commit 5973e5b9 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
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sched: fix: don't take a mutex from interrupt context 



print_cfs_stats is callable from interrupt context (sysrq), hence it should
not take mutexes. Change it to use RCU since the task group data is RCU
freed anyway.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 5fb5e6de

kernel/sched_fair.c

+2 −2
Original line number Diff line number Diff line
@@ -1434,9 +1434,9 @@ static void print_cfs_stats(struct seq_file *m, int cpu) 
#ifdef CONFIG_FAIR_GROUP_SCHED

	print_cfs_rq(m, cpu, &cpu_rq(cpu)->cfs);

#endif

	lock_task_group_list();

	rcu_read_lock();

	for_each_leaf_cfs_rq(cpu_rq(cpu), cfs_rq)

		print_cfs_rq(m, cpu, cfs_rq);

	unlock_task_group_list();

	rcu_read_unlock();

}

#endif