Commit-ID: dc259accec0845ddf56e87337c0b211026eca0ae
Gitweb: https://git.kernel.org/tip/dc259accec0845ddf56e87337c0b211026eca0ae
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Sun, 5 Nov 2017 05:51:43 -0800
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon, 4 Dec 2017 10:29:00 -0800
rcu: Account for rcu_all_qs() in cond_resched()
If cond_resched() returns false, then it has already invoked
rcu_all_qs(). This is also invoked (now redundantly) by
rcu_note_voluntary_context_switch(). This commit therefore changes
cond_resched_rcu_qs() to invoke rcu_note_voluntary_context_switch_lite()
instead of rcu_note_voluntary_context_switch() to avoid the redundant
invocation of rcu_all_qs().
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
include/linux/rcupdate.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index a6ddc42..7bd8b5a 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -197,7 +197,7 @@ static inline void exit_tasks_rcu_finish(void) { }
#define cond_resched_rcu_qs() \
do { \
if (!cond_resched()) \
- rcu_note_voluntary_context_switch(current); \
+ rcu_note_voluntary_context_switch_lite(current); \
} while (0)
/*
--
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