Messages in this thread Patch in this message | | | From | "Paul E. McKenney" <> | Subject | [PATCH tip/core/rcu 10/10] rcu: Initialize tiny RCU stall-warning timeouts at boot | Date | Wed, 7 Jan 2015 09:52:48 -0800 |
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From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
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@linux.vnet.ibm.com> --- kernel/rcu/tiny.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/rcu/tiny.c b/kernel/rcu/tiny.c index 0db5649f8817..fc0f2c07af3a 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(); } -- 1.8.1.5
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