On Thu, May 12, 2022 at 03:04:41AM +0000, Joel Fernandes (Google) wrote: > As per the comments in include/linux/shrinker.h, .count_objects callback > should return the number of freeable items, but if there are no objects > to free, SHRINK_EMPTY should be returned. The only time 0 is returned > should be when we are unable to determine the number of objects, or the > cache should be skipped for another reason. > > Signed-off-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx> > --- > 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 3828ac3bf1c4..f191542cdf5e 100644 > --- a/kernel/rcu/tree.c > +++ b/kernel/rcu/tree.c > @@ -3637,7 +3637,7 @@ kfree_rcu_shrink_count(struct shrinker *shrink, struct shrink_control *sc) > atomic_set(&krcp->backoff_page_cache_fill, 1); > } > > - return count; > + return count == 0 ? SHRINK_EMPTY : count; > } > > static unsigned long > -- > 2.36.0.550.gb090851708-goog > Reviewed-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx> -- Uladzisalu Rezki
