Commit-ID: 630181c4a915edb0761bb282c567d3abc8ca2f35
Gitweb: http://git.kernel.org/tip/630181c4a915edb0761bb282c567d3abc8ca2f35
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Tue, 23 Dec 2014 21:33:14 -0800
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu, 15 Jan 2015 23:33:17 -0800
rcu: Initialize tiny RCU stall-warning timeouts at boot
The current tiny RCU stall-warning code assumes that the jiffies counter
starts at zero, however, it is sometimes initialized to other values,
for example, -30,000. This commit therefore changes rcu_init() to
invoke reset_cpu_stall_ticks() for both flavors of RCU to initialize
the stall-warning times properly at boot.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/tiny.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/rcu/tiny.c b/kernel/rcu/tiny.c
index 0db5649..fc0f2c0 100644
--- a/kernel/rcu/tiny.c
+++ b/kernel/rcu/tiny.c
@@ -383,6 +383,8 @@ EXPORT_SYMBOL_GPL(call_rcu_bh);
void __init rcu_init(void)
{
open_softirq(RCU_SOFTIRQ, rcu_process_callbacks);
+ RCU_TRACE(reset_cpu_stall_ticks(&rcu_sched_ctrlblk));
+ RCU_TRACE(reset_cpu_stall_ticks(&rcu_bh_ctrlblk));
rcu_early_boot_tests();
}
--
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