rcu: Move grace-period pre-init delay after pre-init

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The main race with the early part of grace-period initialization appears
to be with CPU hotplug.  To more fully open this race window, this commit
moves the rcu_gp_slow() from the beginning of the early initialization
loop to follow that loop, thus widening the race window, especially for
the rcu_node structures that are initialized last.  This commit also
expands rcutree.gp_preinit_delay from 3 to 12, giving the same overall
delay in the grace period, but concentrated in the spot where it will
do the most good.

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

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Paul E. McKenney 2018-05-03 13:40:25 -07:00

parent 1f3e5f51b9

commit f34f2f5852

2 changed files with 2 additions and 2 deletions

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2

kernel/rcu/tree.c

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2

tools/testing/selftests/rcutorture/configs/rcu/TREE03.boot

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