On Tue, Apr 10, 2018 at 05:02:40PM -0600, Bart Van Assche wrote: > Because blkcg_exit_queue() is now called from inside blk_cleanup_queue() > it is no longer safe to access cgroup information during or after the > blk_cleanup_queue() call. Hence protect the generic_make_request_checks() > call with blk_queue_enter() / blk_queue_exit(). I think the problem is that blkcg does weird things from blk_cleanup_queue. I'd rather fix that root cause than working around it.
