rcu: Add diagnostics for offline CPUs failing to report QS

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CPUs are expected to report quiescent states when coming online and
when going offline, and grace-period initialization is supposed to
handle any race conditions where a CPU's ->qsmask bit is set just after
it goes offline.  This commit adds diagnostics for the case where an
offline CPU nevertheless has a grace period waiting on it.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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Paul E. McKenney 2018-05-15 16:23:23 -07:00

parent fea3f222d3

commit f2e2df5978

2 changed files with 23 additions and 0 deletions

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22

kernel/rcu/tree.c

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1

kernel/rcu/tree.h

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