From: "Paul E. McKenney" <paul...@linux.vnet.ibm.com>
The rcu_try_advance_all_cbs() function returns a bool saying whether or
not there are callbacks ready to invoke, but rcu_cleanup_after_idle()
rechecks this regardless. This commit therefore uses the value returned
by rcu_try_advance_all_cbs() instead of making rcu_cleanup_after_idle()
do this recheck.
Reported-by: Tibor Billes <tbil...@gmx.com>
Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com>
Tested-by: Tibor Billes <tbil...@gmx.com>
---
kernel/rcutree_plugin.h | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index 130c97b..18d9c91 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -1768,17 +1768,11 @@ static void rcu_prepare_for_idle(int cpu)
*/
static void rcu_cleanup_after_idle(int cpu)
{
- struct rcu_data *rdp;
- struct rcu_state *rsp;
if (rcu_is_nocb_cpu(cpu))
return;
- rcu_try_advance_all_cbs();
- for_each_rcu_flavor(rsp) {
- rdp = per_cpu_ptr(rsp->rda, cpu);
- if (cpu_has_callbacks_ready_to_invoke(rdp))
- invoke_rcu_core();
- }
+ if (rcu_try_advance_all_cbs())
+ invoke_rcu_core();
}
/*
--
1.8.1.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
