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authorLinus Torvalds <torvalds@linux-foundation.org>2015-09-02 13:10:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-02 13:10:25 -0700
commit1081230b748de8f03f37f80c53dfa89feda9b8de (patch)
tree7238d60e01f0843bad8f03b5d84e4220fbba5e76 /drivers/block/rbd.c
parentdf910390e2db07a76c87f258475f6c96253cee6c (diff)
parent2ca495ac27d245513c11fed70591b1838250e240 (diff)
Merge branch 'for-4.3/core' of git://git.kernel.dk/linux-block
Pull core block updates from Jens Axboe: "This first core part of the block IO changes contains: - Cleanup of the bio IO error signaling from Christoph. We used to rely on the uptodate bit and passing around of an error, now we store the error in the bio itself. - Improvement of the above from myself, by shrinking the bio size down again to fit in two cachelines on x86-64. - Revert of the max_hw_sectors cap removal from a revision again, from Jeff Moyer. This caused performance regressions in various tests. Reinstate the limit, bump it to a more reasonable size instead. - Make /sys/block/<dev>/queue/discard_max_bytes writeable, by me. Most devices have huge trim limits, which can cause nasty latencies when deleting files. Enable the admin to configure the size down. We will look into having a more sane default instead of UINT_MAX sectors. - Improvement of the SGP gaps logic from Keith Busch. - Enable the block core to handle arbitrarily sized bios, which enables a nice simplification of bio_add_page() (which is an IO hot path). From Kent. - Improvements to the partition io stats accounting, making it faster. From Ming Lei. - Also from Ming Lei, a basic fixup for overflow of the sysfs pending file in blk-mq, as well as a fix for a blk-mq timeout race condition. - Ming Lin has been carrying Kents above mentioned patches forward for a while, and testing them. Ming also did a few fixes around that. - Sasha Levin found and fixed a use-after-free problem introduced by the bio->bi_error changes from Christoph. - Small blk cgroup cleanup from Viresh Kumar" * 'for-4.3/core' of git://git.kernel.dk/linux-block: (26 commits) blk: Fix bio_io_vec index when checking bvec gaps block: Replace SG_GAPS with new queue limits mask block: bump BLK_DEF_MAX_SECTORS to 2560 Revert "block: remove artifical max_hw_sectors cap" blk-mq: fix race between timeout and freeing request blk-mq: fix buffer overflow when reading sysfs file of 'pending' Documentation: update notes in biovecs about arbitrarily sized bios block: remove bio_get_nr_vecs() fs: use helper bio_add_page() instead of open coding on bi_io_vec block: kill merge_bvec_fn() completely md/raid5: get rid of bio_fits_rdev() md/raid5: split bio for chunk_aligned_read block: remove split code in blkdev_issue_{discard,write_same} btrfs: remove bio splitting and merge_bvec_fn() calls bcache: remove driver private bio splitting code block: simplify bio_add_page() block: make generic_make_request handle arbitrarily sized bios blk-cgroup: Drop unlikely before IS_ERR(_OR_NULL) block: don't access bio->bi_error after bio_put() block: shrink struct bio down to 2 cache lines again ...
Diffstat (limited to 'drivers/block/rbd.c')
-rw-r--r--drivers/block/rbd.c49
1 files changed, 1 insertions, 48 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index bc67a93aa4f4..698f761037ce 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3474,52 +3474,6 @@ 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;
@@ -3815,10 +3769,9 @@ 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);
disk->queue = q;
q->queuedata = rbd_dev;