On Oct 24, 2024, at 9:07 PM, Hongling Zeng <zenghongling@xxxxxxxxxx> wrote: > > Since SLOB was removed and since > commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"), > it is not necessary to use call_rcu when the callback only performs > kmem_cache_free. Use kfree_rcu() directly. I’d take an extra look at that one if I were you. — Jens Axboe