On Mon, Mar 16, 2015 at 11:37:45AM -0700, Paul E. McKenney wrote: > From: "Paul E. McKenney" <[email protected]> > > RCU ignores offlined CPUs, so they cannot safely run RCU read-side code. > (They -can- use SRCU, but not RCU.) This means that any use of RCU > during or after the call to arch_cpu_idle_dead(). Unfortunately, > commit 2ed53c0d6cc99 added a complete() call, which will contain RCU > read-side critical sections if there is a task waiting to be awakened.
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