From c635a4e1c24e9396db10ed7424b2084908b32252 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Mon, 29 Oct 2012 07:29:20 -0700 Subject: rcu: Separate accounting of callbacks from callback-free CPUs Currently, callback invocations from callback-free CPUs are accounted to the CPU that registered the callback, but using the same field that is used for normal callbacks. This makes it impossible to determine from debugfs output whether callbacks are in fact being diverted. This commit therefore adds a separate ->n_nocbs_invoked field in the rcu_data structure in which diverted callback invocations are counted. RCU's debugfs tracing still displays normal callback invocations using ci=, but displayed diverted callbacks with nci=. Signed-off-by: Paul E. McKenney Signed-off-by: Paul E. McKenney --- kernel/rcutree_plugin.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/rcutree_plugin.h') diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h index 6cdc372de34..f6e5ec2932b 100644 --- a/kernel/rcutree_plugin.h +++ b/kernel/rcutree_plugin.h @@ -2406,7 +2406,7 @@ static int rcu_nocb_kthread(void *arg) trace_rcu_batch_end(rdp->rsp->name, c, !!list, 0, 0, 1); ACCESS_ONCE(rdp->nocb_p_count) -= c; ACCESS_ONCE(rdp->nocb_p_count_lazy) -= cl; - rdp->n_cbs_invoked += c; + rdp->n_nocbs_invoked += c; } return 0; } -- cgit v1.2.3-18-g5258