Re: [PATCH v2] block: Fix a deadlock related to modifying the readahead attribute

On Thu, Jun 26, 2025 at 01:37:13PM -0700, Bart Van Assche wrote:

This deadlock happens because blk_mq_freeze_queue_nomemsave() waits for pending requests to finish. The pending requests do never complete because the dm-multipath queue_if_no_path option is enabled and the only path in the dm-multipath configuration is being removed.

Well, if there are queued never completed bios the freeze will obviously fail. I don't see how this freeze is special vs other freezes or other attributes that freeze.