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| author |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-05-03 13:40:25 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-07-12 15:39:06 -0700 |
| commit | f34f2f5852e556ee1c3b3b294571086b1791008a (patch) | |
| tree | 499c355393046ecce8036cc39b52b98fc60c539e /tools/testing/selftests/rcutorture | |
| parent | rcu: Add RCU-preempt check for waiting on newly onlined CPU (diff) | |
| download | wireguard-linux-f34f2f5852e556ee1c3b3b294571086b1791008a.tar.xz wireguard-linux-f34f2f5852e556ee1c3b3b294571086b1791008a.zip | |
rcu: Move grace-period pre-init delay after pre-init
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>
Diffstat (limited to 'tools/testing/selftests/rcutorture')
| -rw-r--r-- | tools/testing/selftests/rcutorture/configs/rcu/TREE03.boot | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE03.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE03.boot index 5d2cc0bd50a0..b79ddb9eb9e8 100644 --- a/tools/testing/selftests/rcutorture/configs/rcu/TREE03.boot +++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE03.boot @@ -1,5 +1,5 @@ rcutorture.onoff_interval=1 rcutorture.onoff_holdoff=30 -rcutree.gp_preinit_delay=3 +rcutree.gp_preinit_delay=12 rcutree.gp_init_delay=3 rcutree.gp_cleanup_delay=3 rcutree.kthread_prio=2 |