rcu: Print number of online CPUs in RCU CPU stall-warning messages

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RCU's synchronous grace periods act quite differently when there is
only one online CPU, especially in the no-op case in kernels built with
CONFIG_PREEMPTION=n.  This change in behavior can be important debugging
information, so this commit adds the number of online CPUs to the RCU
CPU stall warning messages.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Paul E. McKenney 2022-03-11 10:10:35 -08:00

parent 75182a4eaa

commit 80d530b47d

1 changed files with 4 additions and 4 deletions

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8

kernel/rcu/tree_stall.h

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