Commit c53dbf54 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  block: remove __generic_unplug_device() from exports
  block: move q->unplug_work initialization
  blktrace: pass zfcp driver data
  blktrace: add support for driver data
  block: fix current kernel-doc warnings
  block: only call ->request_fn when the queue is not stopped
  block: simplify string handling in elv_iosched_store()
  block: fix kernel-doc for blk_alloc_devt()
  block: fix nr_phys_segments miscalculation bug
  block: add partition attribute for partition number
  block: add BIG FAT WARNING to CONFIG_DEBUG_BLOCK_EXT_DEVT
  softirq: Add support for triggering softirq work on softirqs.
parents b73b636e f73e2d13

block/blk-core.c

+21 −5
Original line number Diff line number Diff line
@@ -257,7 +257,6 @@ void __generic_unplug_device(struct request_queue *q) 


	q->request_fn(q);

}

EXPORT_SYMBOL(__generic_unplug_device);



/**

 * generic_unplug_device - fire a request queue
@@ -325,6 +324,9 @@ EXPORT_SYMBOL(blk_unplug); 


static void blk_invoke_request_fn(struct request_queue *q)

{

	if (unlikely(blk_queue_stopped(q)))

		return;



	/*

	 * one level of recursion is ok and is much faster than kicking

	 * the unplug handling
@@ -399,8 +401,13 @@ void blk_sync_queue(struct request_queue *q) 
EXPORT_SYMBOL(blk_sync_queue);



/**

 * blk_run_queue - run a single device queue

 * __blk_run_queue - run a single device queue

 * @q:	The queue to run

 *

 * Description:

 *    See @blk_run_queue. This variant must be called with the queue lock

 *    held and interrupts disabled.

 *

 */

void __blk_run_queue(struct request_queue *q)

{
@@ -418,6 +425,12 @@ EXPORT_SYMBOL(__blk_run_queue); 
/**

 * blk_run_queue - run a single device queue

 * @q: The queue to run

 *

 * Description:

 *    Invoke request handling on this queue, if it has pending work to do.

 *    May be used to restart queueing when a request has completed. Also

 *    See @blk_start_queueing.

 *

 */

void blk_run_queue(struct request_queue *q)

{
@@ -501,6 +514,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id) 
	init_timer(&q->unplug_timer);

	setup_timer(&q->timeout, blk_rq_timed_out_timer, (unsigned long) q);

	INIT_LIST_HEAD(&q->timeout_list);

	INIT_WORK(&q->unplug_work, blk_unplug_work);



	kobject_init(&q->kobj, &blk_queue_ktype);
@@ -884,7 +898,8 @@ EXPORT_SYMBOL(blk_get_request); 
 *

 * This is basically a helper to remove the need to know whether a queue

 * is plugged or not if someone just wants to initiate dispatch of requests

 * for this queue.

 * for this queue. Should be used to start queueing on a device outside

 * of ->request_fn() context. Also see @blk_run_queue.

 *

 * The queue lock must be held with interrupts disabled.

 */
@@ -1003,8 +1018,9 @@ static void part_round_stats_single(int cpu, struct hd_struct *part, 
}



/**

 * part_round_stats()	- Round off the performance stats on a struct

 * disk_stats.

 * part_round_stats() - Round off the performance stats on a struct disk_stats.

 * @cpu: cpu number for stats access

 * @part: target partition

 *

 * The average IO queue length and utilisation statistics are maintained

 * by observing the current state of the queue length and the amount of

block/blk-merge.c

+18 −2
Original line number Diff line number Diff line
@@ -77,12 +77,20 @@ void blk_recalc_rq_segments(struct request *rq) 
			continue;

		}

new_segment:

		if (nr_phys_segs == 1 && seg_size > rq->bio->bi_seg_front_size)

			rq->bio->bi_seg_front_size = seg_size;



		nr_phys_segs++;

		bvprv = bv;

		seg_size = bv->bv_len;

		highprv = high;

	}



	if (nr_phys_segs == 1 && seg_size > rq->bio->bi_seg_front_size)

		rq->bio->bi_seg_front_size = seg_size;

	if (seg_size > rq->biotail->bi_seg_back_size)

		rq->biotail->bi_seg_back_size = seg_size;



	rq->nr_phys_segments = nr_phys_segs;

}
@@ -106,7 +114,8 @@ static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio, 
	if (!test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags))

		return 0;



	if (bio->bi_size + nxt->bi_size > q->max_segment_size)

	if (bio->bi_seg_back_size + nxt->bi_seg_front_size >

	    q->max_segment_size)

		return 0;



	if (!bio_has_data(bio))
@@ -309,6 +318,8 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req, 
				struct request *next)

{

	int total_phys_segments;

	unsigned int seg_size =

		req->biotail->bi_seg_back_size + next->bio->bi_seg_front_size;



	/*

	 * First check if the either of the requests are re-queued
@@ -324,8 +335,13 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req, 
		return 0;



	total_phys_segments = req->nr_phys_segments + next->nr_phys_segments;

	if (blk_phys_contig_segment(q, req->biotail, next->bio))

	if (blk_phys_contig_segment(q, req->biotail, next->bio)) {

		if (req->nr_phys_segments == 1)

			req->bio->bi_seg_front_size = seg_size;

		if (next->nr_phys_segments == 1)

			next->biotail->bi_seg_back_size = seg_size;

		total_phys_segments--;

	}



	if (total_phys_segments > q->max_phys_segments)

		return 0;

block/blk-settings.c

+0 −2
Original line number Diff line number Diff line
@@ -141,8 +141,6 @@ void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn) 
	if (q->unplug_delay == 0)

		q->unplug_delay = 1;



	INIT_WORK(&q->unplug_work, blk_unplug_work);



	q->unplug_timer.function = blk_unplug_timeout;

	q->unplug_timer.data = (unsigned long)q;

block/blk.h

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ void blk_unplug_timeout(unsigned long data); 
void blk_rq_timed_out_timer(unsigned long data);

void blk_delete_timer(struct request *);

void blk_add_timer(struct request *);

void __generic_unplug_device(struct request_queue *);



/*

 * Internal atomic flags for request handling

block/elevator.c

+5 −11
Original line number Diff line number Diff line
@@ -612,7 +612,7 @@ void elv_insert(struct request_queue *q, struct request *rq, int where) 
		 *   processing.

		 */

		blk_remove_plug(q);

		q->request_fn(q);

		blk_start_queueing(q);

		break;



	case ELEVATOR_INSERT_SORT:
@@ -950,7 +950,7 @@ void elv_completed_request(struct request_queue *q, struct request *rq) 
		    blk_ordered_cur_seq(q) == QUEUE_ORDSEQ_DRAIN &&

		    blk_ordered_req_seq(first_rq) > QUEUE_ORDSEQ_DRAIN) {

			blk_ordered_complete_seq(q, QUEUE_ORDSEQ_DRAIN, 0);

			q->request_fn(q);

			blk_start_queueing(q);

		}

	}

}
@@ -1109,8 +1109,7 @@ static int elevator_switch(struct request_queue *q, struct elevator_type *new_e) 
	elv_drain_elevator(q);



	while (q->rq.elvpriv) {

		blk_remove_plug(q);

		q->request_fn(q);

		blk_start_queueing(q);

		spin_unlock_irq(q->queue_lock);

		msleep(10);

		spin_lock_irq(q->queue_lock);
@@ -1166,15 +1165,10 @@ ssize_t elv_iosched_store(struct request_queue *q, const char *name, 
			  size_t count)

{

	char elevator_name[ELV_NAME_MAX];

	size_t len;

	struct elevator_type *e;



	elevator_name[sizeof(elevator_name) - 1] = '\0';

	strncpy(elevator_name, name, sizeof(elevator_name) - 1);

	len = strlen(elevator_name);



	if (len && elevator_name[len - 1] == '\n')

		elevator_name[len - 1] = '\0';

	strlcpy(elevator_name, name, sizeof(elevator_name));

	strstrip(elevator_name);



	e = elevator_get(elevator_name);

	if (!e) {

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