From 2bb4cd5cc472b191a46938becb7dafdd44644329 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Tue, 14 Jul 2015 08:15:12 -0600 Subject: block: have drivers use blk_queue_max_discard_sectors() Some drivers use it now, others just set the limits field manually. But in preparation for splitting this into a hard and soft limit, ensure that they all call the proper function for setting the hw limit for discards. Reviewed-by: Jeff Moyer Signed-off-by: Jens Axboe --- drivers/block/rbd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/block/rbd.c') diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index d94529d5c8e9..dcc86937f55c 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -3803,7 +3803,7 @@ static int rbd_init_disk(struct rbd_device *rbd_dev) queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q); q->limits.discard_granularity = segment_size; q->limits.discard_alignment = segment_size; - q->limits.max_discard_sectors = segment_size / SECTOR_SIZE; + blk_queue_max_discard_sectors(q, segment_size / SECTOR_SIZE); q->limits.discard_zeroes_data = 1; blk_queue_merge_bvec(q, rbd_merge_bvec); -- cgit v1.2.3 From 8ae126660fddbeebb9251a174e6fa45b6ad8f932 Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Mon, 27 Apr 2015 23:48:34 -0700 Subject: block: kill merge_bvec_fn() completely As generic_make_request() is now able to handle arbitrarily sized bios, it's no longer necessary for each individual block driver to define its own ->merge_bvec_fn() callback. Remove every invocation completely. Cc: Jens Axboe Cc: Lars Ellenberg Cc: drbd-user@lists.linbit.com Cc: Jiri Kosina Cc: Yehuda Sadeh Cc: Sage Weil Cc: Alex Elder Cc: ceph-devel@vger.kernel.org Cc: Alasdair Kergon Cc: Mike Snitzer Cc: dm-devel@redhat.com Cc: Neil Brown Cc: linux-raid@vger.kernel.org Cc: Christoph Hellwig Cc: "Martin K. Petersen" Acked-by: NeilBrown (for the 'md' bits) Acked-by: Mike Snitzer Signed-off-by: Kent Overstreet [dpark: also remove ->merge_bvec_fn() in dm-thin as well as dm-era-target, and resolve merge conflicts] Signed-off-by: Dongsu Park Signed-off-by: Ming Lin Signed-off-by: Jens Axboe --- drivers/block/rbd.c | 47 ----------------------------------------------- 1 file changed, 47 deletions(-) (limited to 'drivers/block/rbd.c') diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index dcc86937f55c..71dd061a7e11 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -3462,52 +3462,6 @@ static int rbd_queue_rq(struct blk_mq_hw_ctx *hctx, return BLK_MQ_RQ_QUEUE_OK; } -/* - * a queue callback. Makes sure that we don't create a bio that spans across - * multiple osd objects. One exception would be with a single page bios, - * which we handle later at bio_chain_clone_range() - */ -static int rbd_merge_bvec(struct request_queue *q, struct bvec_merge_data *bmd, - struct bio_vec *bvec) -{ - struct rbd_device *rbd_dev = q->queuedata; - sector_t sector_offset; - sector_t sectors_per_obj; - sector_t obj_sector_offset; - int ret; - - /* - * Find how far into its rbd object the partition-relative - * bio start sector is to offset relative to the enclosing - * device. - */ - sector_offset = get_start_sect(bmd->bi_bdev) + bmd->bi_sector; - sectors_per_obj = 1 << (rbd_dev->header.obj_order - SECTOR_SHIFT); - obj_sector_offset = sector_offset & (sectors_per_obj - 1); - - /* - * Compute the number of bytes from that offset to the end - * of the object. Account for what's already used by the bio. - */ - ret = (int) (sectors_per_obj - obj_sector_offset) << SECTOR_SHIFT; - if (ret > bmd->bi_size) - ret -= bmd->bi_size; - else - ret = 0; - - /* - * Don't send back more than was asked for. And if the bio - * was empty, let the whole thing through because: "Note - * that a block device *must* allow a single page to be - * added to an empty bio." - */ - rbd_assert(bvec->bv_len <= PAGE_SIZE); - if (ret > (int) bvec->bv_len || !bmd->bi_size) - ret = (int) bvec->bv_len; - - return ret; -} - static void rbd_free_disk(struct rbd_device *rbd_dev) { struct gendisk *disk = rbd_dev->disk; @@ -3806,7 +3760,6 @@ static int rbd_init_disk(struct rbd_device *rbd_dev) blk_queue_max_discard_sectors(q, segment_size / SECTOR_SIZE); q->limits.discard_zeroes_data = 1; - blk_queue_merge_bvec(q, rbd_merge_bvec); disk->queue = q; q->queuedata = rbd_dev; -- cgit v1.2.3