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rcu: Stop shrinker loop

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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) <urezki@gmail.com>
Signed-off-by: Peter Enderborg <peter.enderborg@sony.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Peter Enderborg 2020-06-04 12:23:20 +02:00 committed by Paul E. McKenney
parent e40bb92111
commit c6dfd72b7a
1 changed files with 1 additions and 1 deletions
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kernel/rcu/tree.c
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@ -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 = {