Commit 86d9c070 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-2.6.30' of git://git.kernel.dk/linux-2.6-block 

* 'for-2.6.30' of git://git.kernel.dk/linux-2.6-block:
  Get rid of pdflush_operation() in emergency sync and remount
  btrfs: get rid of current_is_pdflush() in btrfs_btree_balance_dirty
  Move the default_backing_dev_info out of readahead.c and into backing-dev.c
  block: Repeated lines in switching-sched.txt
  bsg: Remove bogus check against request_queue->max_sectors
  block: WARN in __blk_put_request() for potential bio leak
  loop: fix circular locking in loop_clr_fd()
  loop: support barrier writes
  bsg: add support for tail queuing
  cpqarray: enable bus mastering
  block: genhd.h cleanup patch
  block: add private bio_set for bio integrity allocations
  block: genhd.h comment needs updating
  block: get rid of unused blkdev_free_rq() define
  block: remove various blk_queue_*() setting functions in blk_init_queue_node()
  cciss: add BUILD_BUG_ON() for catching bad CommandList_struct alignment
  block: don't create bio_vec slabs of less than the inline number
  block: cleanup bio_alloc_bioset()
parents 413e3376 a2a9537a

Documentation/block/switching-sched.txt

+0 −6
Original line number Diff line number Diff line
@@ -35,9 +35,3 @@ noop anticipatory deadline [cfq] 
# echo anticipatory > /sys/block/hda/queue/scheduler

# cat /sys/block/hda/queue/scheduler

noop [anticipatory] deadline cfq
 


Each io queue has a set of io scheduler tunables associated with it. These

tunables control how the io scheduler works. You can find these entries

in:



/sys/block/<device>/queue/iosched

block/blk-core.c

+6 −7
Original line number Diff line number Diff line
@@ -603,13 +603,10 @@ blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id) 
	q->queue_flags		= QUEUE_FLAG_DEFAULT;

	q->queue_lock		= lock;



	blk_queue_segment_boundary(q, BLK_SEG_BOUNDARY_MASK);



	/*

	 * This also sets hw/phys segments, boundary and size

	 */

	blk_queue_make_request(q, __make_request);

	blk_queue_max_segment_size(q, MAX_SEGMENT_SIZE);



	blk_queue_max_hw_segments(q, MAX_HW_SEGMENTS);

	blk_queue_max_phys_segments(q, MAX_PHYS_SEGMENTS);



	q->sg_reserved_size = INT_MAX;
@@ -735,7 +732,6 @@ static void freed_request(struct request_queue *q, int rw, int priv) 
		__freed_request(q, rw ^ 1);

}



#define blkdev_free_rq(list) list_entry((list)->next, struct request, queuelist)

/*

 * Get a free request, queue_lock must be held.

 * Returns NULL on failure, with queue_lock held.
@@ -1066,6 +1062,9 @@ void __blk_put_request(struct request_queue *q, struct request *req) 


	elv_completed_request(q, req);



	/* this is a bio leak */

	WARN_ON(req->bio != NULL);



	/*

	 * Request may not have originated from ll_rw_blk. if not,

	 * it didn't come out of our reserved rq pools

block/blk-merge.c

+2 −0
Original line number Diff line number Diff line
@@ -403,6 +403,8 @@ static int attempt_merge(struct request_queue *q, struct request *req, 
	if (blk_rq_cpu_valid(next))

		req->cpu = next->cpu;



	/* owner-ship of bio passed from next to req */

	next->bio = NULL;

	__blk_put_request(q, next);

	return 1;

}

block/bsg.c

+7 −5
Original line number Diff line number Diff line
@@ -218,9 +218,6 @@ bsg_validate_sgv4_hdr(struct request_queue *q, struct sg_io_v4 *hdr, int *rw) 


	if (hdr->guard != 'Q')

		return -EINVAL;

	if (hdr->dout_xfer_len > (q->max_sectors << 9) ||

	    hdr->din_xfer_len > (q->max_sectors << 9))

		return -EIO;



	switch (hdr->protocol) {

	case BSG_PROTOCOL_SCSI:
@@ -353,6 +350,8 @@ static void bsg_rq_end_io(struct request *rq, int uptodate) 
static void bsg_add_command(struct bsg_device *bd, struct request_queue *q,

			    struct bsg_command *bc, struct request *rq)

{

	int at_head = (0 == (bc->hdr.flags & BSG_FLAG_Q_AT_TAIL));



	/*

	 * add bc command to busy queue and submit rq for io

	 */
@@ -368,7 +367,7 @@ static void bsg_add_command(struct bsg_device *bd, struct request_queue *q, 
	dprintk("%s: queueing rq %p, bc %p\n", bd->name, rq, bc);



	rq->end_io_data = bc;

	blk_execute_rq_nowait(q, NULL, rq, 1, bsg_rq_end_io);

	blk_execute_rq_nowait(q, NULL, rq, at_head, bsg_rq_end_io);

}



static struct bsg_command *bsg_next_done_cmd(struct bsg_device *bd)
@@ -924,6 +923,7 @@ static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
		struct request *rq;

		struct bio *bio, *bidi_bio = NULL;

		struct sg_io_v4 hdr;

		int at_head;

		u8 sense[SCSI_SENSE_BUFFERSIZE];



		if (copy_from_user(&hdr, uarg, sizeof(hdr)))
@@ -936,7 +936,9 @@ static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
		bio = rq->bio;

		if (rq->next_rq)

			bidi_bio = rq->next_rq->bio;

		blk_execute_rq(bd->queue, NULL, rq, 0);



		at_head = (0 == (hdr.flags & BSG_FLAG_Q_AT_TAIL));

		blk_execute_rq(bd->queue, NULL, rq, at_head);

		ret = blk_complete_sgv4_hdr_rq(rq, &hdr, bio, bidi_bio);



		if (copy_to_user(uarg, &hdr, sizeof(hdr)))

block/scsi_ioctl.c

+4 −17
Original line number Diff line number Diff line
@@ -214,21 +214,10 @@ static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq, 
	return 0;

}



/*

 * unmap a request that was previously mapped to this sg_io_hdr. handles

 * both sg and non-sg sg_io_hdr.

 */

static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)

{

	blk_rq_unmap_user(rq->bio);

	blk_put_request(rq);

	return 0;

}



static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,

				 struct bio *bio)

{

	int r, ret = 0;

	int ret = 0;



	/*

	 * fill in all the output members
@@ -253,12 +242,10 @@ static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr, 
			ret = -EFAULT;

	}



	rq->bio = bio;

	r = blk_unmap_sghdr_rq(rq, hdr);

	if (ret)

		r = ret;

	blk_rq_unmap_user(bio);

	blk_put_request(rq);



	return r;

	return ret;

}



static int sg_io(struct request_queue *q, struct gendisk *bd_disk,

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