From: "Paul E. McKenney" <[email protected]> The rcu_data structure's ->rcu_qs_ctr_snap field is initialized at CPU-online time from the current CPU's element of the per-CPU rcu_qs_ctr variable. Unfortunately, this is at CPU_UP_PREPARE time, so has nothing to do with the CPU being onlined. This commit therefore initializes this variable from the incoming CPU's element of rcu_qs_ctr.
Signed-off-by: Paul E. McKenney <[email protected]> --- kernel/rcu/tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 1eb1029a5464..48d002d4faac 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3761,7 +3761,7 @@ rcu_init_percpu_data(int cpu, struct rcu_state *rsp) rdp->gpnum = rnp->completed; /* Make CPU later note any new GP. */ rdp->completed = rnp->completed; rdp->passed_quiesce = false; - rdp->rcu_qs_ctr_snap = __this_cpu_read(rcu_qs_ctr); + rdp->rcu_qs_ctr_snap = per_cpu(rcu_qs_ctr, cpu); rdp->qs_pending = false; trace_rcu_grace_period(rsp->name, rdp->gpnum, TPS("cpuonl")); raw_spin_unlock_irqrestore(&rnp->lock, flags); -- 1.8.1.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
