The following commit has been merged into the core/rcu branch of tip:
Commit-ID: c6dfd72b7a3b70a2054db0f73245ea2f762a8452
Gitweb:
https://git.kernel.org/tip/c6dfd72b7a3b70a2054db0f73245ea2f762a8452
Author: Peter Enderborg <peter.enderb...@sony.com>
AuthorDate: Thu, 04 Jun 2020 12:23:20 +02:00
Committer: Paul E. McKenney <paul...@kernel.org>
CommitterDate: Mon, 29 Jun 2020 11:58:51 -07:00
rcu: Stop shrinker loop
The count and scan can be separated in time, and there is a fair chance
that all work is already done when the scan starts, which might in turn
result in a needless retry. This commit therefore avoids this retry by
returning SHRINK_STOP.
Reviewed-by: Uladzislau Rezki (Sony) <ure...@gmail.com>
Signed-off-by: Peter Enderborg <peter.enderb...@sony.com>
Signed-off-by: Paul E. McKenney <paul...@kernel.org>
---
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 d17e5a0..c8196fa 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3332,7 +3332,7 @@ kfree_rcu_shrink_scan(struct shrinker *shrink, struct
shrink_control *sc)
break;
}
- return freed;
+ return freed == 0 ? SHRINK_STOP : freed;
}
static struct shrinker kfree_rcu_shrinker = {
