Re: [PATCH 6.12.y 11/15] io_uring/msg_ring: ensure io_kiocb freeing is deferred for RCU

On 9/5/25 5:04 AM, Harshit Mogalapalli wrote:

diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h index 5ce332fc6ff5..3b27d9bcf298 100644 --- a/include/linux/io_uring_types.h +++ b/include/linux/io_uring_types.h @@ -648,6 +648,8 @@ struct io_kiocb { struct io_task_work io_task_work; /* for polled requests, i.e. IORING_OP_POLL_ADD and async armed poll */ struct hlist_node hash_node;

• /* for private io_kiocb freeing */
• struct rcu_head rcu_head; /* internal polling, see IORING_FEAT_FAST_POLL */ struct async_poll *apoll; /* opcode allocated if it needs to store data for async defer */

This should go into a union with hash_node, rather than bloat the struct. That's how it was done upstream, not sure why this one is different?