Hi, list What are the relations between queued_spin_lock_slowpath function and __raw_spin_lock function? For your convenience, here are the URLs of the related code snippets: https://elixir.bootlin.com/linux/v4.19.84/source/include/linux/spinlock_api_... https://elixir.bootlin.com/linux/v4.19.84/source/kernel/locking/qspinlock.c#... Though I have carefully read the related code snippet, I still can't answer this question. I would be grateful to have some help with this question. Thank you for your attention to this matter. Best regards.