On Wed, Feb 15, 2023 at 10:09:36PM -0800, Christoph Hellwig wrote: > I'd just remove the debug check entirely Older kernels have these checks in a separate function called blk_cloned_rq_check_limits, which carries the following comment: /** * blk_cloned_rq_check_limits - Helper function to check a cloned request * for the new queue limits * @q: the queue * @rq: the request being checked * * Description: * @rq may have been made based on weaker limitations of upper-level queues * in request stacking drivers, and it may violate the limitation of @q. * Since the block layer and the underlying device driver trust @rq * after it is inserted to @q, it should be checked against @q before * the insertion using this generic function. * * Request stacking drivers like request-based dm may change the queue * limits when retrying requests on other queues. Those requests need * to be checked against the new queue limits again during dispatch. */. Is this concern no longer relevant?
