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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-03-10 15:44:52 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-03-13 14:44:25 -0700
commit81e59494a56cb14f559886c345c4a93fb576bbab (patch)
treeb12b10e2c9f3f6276b9da55bf85c6547b12b7c7b /kernel/rcutree.c
parent6231069bdab575fce862ca786f1c0ba5e4e9ba3b (diff)
downloadlinux-81e59494a56cb14f559886c345c4a93fb576bbab.tar.bz2
rcu: Tone down debugging during boot-up and shutdown.
In some situations, randomly delaying RCU grace-period initialization can cause more trouble than help. This commit therefore restricts this type of RCU self-torture to runtime, giving it a rest during boot and shutdown. Reported-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcutree.c')
-rw-r--r--kernel/rcutree.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 71df6f9f5ce6..0e522504ae37 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1319,7 +1319,8 @@ static int rcu_gp_init(struct rcu_state *rsp)
rnp->grphi, rnp->qsmask);
raw_spin_unlock_irq(&rnp->lock);
#ifdef CONFIG_PROVE_RCU_DELAY
- if ((random32() % (rcu_num_nodes * 8)) == 0)
+ if ((random32() % (rcu_num_nodes * 8)) == 0 &&
+ system_state == SYSTEM_RUNNING)
schedule_timeout_uninterruptible(2);
#endif /* #ifdef CONFIG_PROVE_RCU_DELAY */
cond_resched();