Re: [PATCH] blk-mq: put the reference of the io scheduler module after switching back

Yu Kuai <yukuai1@xxxxxxxxxxxxxxx> · Fri, 14 Oct 2022 15:27:29 +0800

Hi!

在 2022/10/13 22:18, Jinlong Chen 写道:

But I don't see elevator_switch() release the referenct of the module
it is switching from. It's still not balance to me.

The reference count is released here:

elevator_switch_mq()
   --> elevator_exit()
     --> __elevator_exit()
       --> kobject_put()
         --> kobject_release()
           --> elevator_release()
             --> elevator_put()

What a deep call stack. :)

Yes, you're right.

Thanks,
Kuai

Sincerely,
Jinlong Chen
.