On Fri, Feb 28, 2025 at 07:38:36PM +0800, Jingxiang Zeng wrote:
> @@ -84,6 +86,9 @@ lock_list_lru_of_memcg(struct list_lru *lru, int nid, struct mem_cgroup *memcg,
> spin_unlock_irq(&l->lock);
> else
> spin_unlock(&l->lock);
> + } else {
> + if (!memcg_list_lru_alloc(memcg, lru))
> + goto again;
> }
Unfortunately, you can't do allocations from this path :(
list_lru_add() is called from many places with spinlocks, rcu locks
etc. held.
