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Now that RCU scans both running tasks and tasks that have blocked within
their current RCU Tasks Trace read-side critical section, there is no
need for it to scan the idle tasks. After all, an idle loop should not
be remain within an RCU Tasks Trace read-side critical section across
exit from idle, and from a BPF viewpoint, functions invoked from the
idle loop should not sleep. So only running idle tasks can be within
RCU Tasks Trace read-side critical sections.
This commit therefore removes the scan of the idle tasks from the
rcu_tasks_trace_postscan() function.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: KP Singh <kpsingh@kernel.org>
955a019208