Re: [PATCH 1/3] block: Remove queue freezing from several sysfs store callbacks

On Wed, Jul 02, 2025 at 11:24:28AM -0700, Bart Van Assche wrote:

Freezing the request queue from inside sysfs store callbacks may cause a deadlock in combination with the dm-multipath driver and the queue_if_no_path option. Additionally, freezing the request queue slows down system boot on systems where sysfs attributes are set synchronously.

Fix this by removing the blk_mq_freeze_queue() / blk_mq_unfreeze_queue() calls from the store callbacks that do not strictly need these callbacks.

Please add commit log why freeze isn't needed for these sysfs attributes callbacks.

Thanks, Ming