Re: Regarding patch "block/blk-mq: Don't complete locally if capacities are different"

[Bart Van Assche <bvanassche@acm.org>]

On 8/23/24 6:49 AM, MANISH PANDEY wrote:
> while making the patch, i figured out that queue_flags is unsigned long 
> type and we already reached up to 32 flags as of now.

Really? In Linus' master branch I see 13 queue flags. This is less than
half of 32. From include/linux/blkdev.h:

enum {
	QUEUE_FLAG_DYING,		/* queue being torn down */
	QUEUE_FLAG_NOMERGES,		/* disable merge attempts */
	QUEUE_FLAG_SAME_COMP,		/* complete on same CPU-group */
	QUEUE_FLAG_FAIL_IO,		/* fake timeout */
	QUEUE_FLAG_NOXMERGES,		/* No extended merges */
	QUEUE_FLAG_SAME_FORCE,		/* force complete on same CPU */
	QUEUE_FLAG_INIT_DONE,		/* queue is initialized */
	QUEUE_FLAG_STATS,		/* track IO start and completion times */
	QUEUE_FLAG_REGISTERED,		/* queue has been registered to a disk */
	QUEUE_FLAG_QUIESCED,		/* queue has been quiesced */
	QUEUE_FLAG_RQ_ALLOC_TIME,	/* record rq->alloc_time_ns */
	QUEUE_FLAG_HCTX_ACTIVE,		/* at least one blk-mq hctx is active */
	QUEUE_FLAG_SQ_SCHED,		/* single queue style io dispatch */
	QUEUE_FLAG_MAX
};

Bart.