On 4/7/21 11:59 AM, Saravanan D wrote: > blk_mq_debugfs_register_sched_hctx() called from > device_add_disk()->elevator_init_mq()->blk_mq_init_sched() > initialization sequence does not have relevant parent directory > setup and thus spuriously attempts "sched" directory creation > from root mount of debugfs for every hw queue detected on the > block device > > dmesg > ... > debugfs: Directory 'sched' with parent '/' already present! > debugfs: Directory 'sched' with parent '/' already present! > . > . > debugfs: Directory 'sched' with parent '/' already present! > ... > > The parent debugfs directory for hw queues get properly setup > device_add_disk()->blk_register_queue()->blk_mq_debugfs_register() > ->blk_mq_debugfs_register_hctx() later in the block device > initialization sequence. > > A simple check for debugfs_dir has been added to thwart premature > debugfs directory/file creation attempts.
Applied, thanks. -- Jens Axboe
