rcu: Add quiescent states and boost states to show_rcu_gp_kthreads() output

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This commit adds each rcu_node structure's ->qsmask and "bBEG" output
indicating whether: (1) There is a boost kthread, (2) A reader needs
to be (or is in the process of being) boosted, (3) A reader is blocking
an expedited grace period, and (4) A reader is blocking a normal grace
period.  This helps diagnose RCU priority boosting failures.

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

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This commit is contained in:

Paul E. McKenney 2021-04-06 16:31:42 -07:00

parent 3066820034

commit 396eba65f6

3 changed files with 11 additions and 3 deletions

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1

kernel/rcu/tree.h

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1

kernel/rcu/tree_plugin.h

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12

kernel/rcu/tree_stall.h

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