Files
linux/include/linux
Frederic Weisbecker 9855c37edf Revert "rcu-tasks: Fix synchronize_rcu_tasks() VS zap_pid_ns_processes()"
This reverts commit 28319d6dc5. The race
it fixed was subject to conditions that don't exist anymore since:

	1612160b91 ("rcu-tasks: Eliminate deadlocks involving do_exit() and RCU tasks")

This latter commit removes the use of SRCU that used to cover the
RCU-tasks blind spot on exit between the tasklist's removal and the
final preemption disabling. The task is now placed instead into a
temporary list inside which voluntary sleeps are accounted as RCU-tasks
quiescent states. This would disarm the deadlock initially reported
against PID namespace exit.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2024-06-03 17:30:08 -07:00
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