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for-5.1/block-post-20190315

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Merge tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block

Pull more block layer changes from Jens Axboe:
 "This is a collection of both stragglers, and fixes that came in after
  I finalized the initial pull. This contains:

   - An MD pull request from Song, with a few minor fixes

   - Set of NVMe patches via Christoph

   - Pull request from Konrad, with a few fixes for xen/blkback

   - pblk fix IO calculation fix (Javier)

   - Segment calculation fix for pass-through (Ming)

   - Fallthrough annotation for blkcg (Mathieu)"

* tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block: (25 commits)
  blkcg: annotate implicit fall through
  nvme-tcp: support C2HData with SUCCESS flag
  nvmet: ignore EOPNOTSUPP for discard
  nvme: add proper write zeroes setup for the multipath device
  nvme: add proper discard setup for the multipath device
  nvme: remove nvme_ns_config_oncs
  nvme: disable Write Zeroes for qemu controllers
  nvmet-fc: bring Disconnect into compliance with FC-NVME spec
  nvmet-fc: fix issues with targetport assoc_list list walking
  nvme-fc: reject reconnect if io queue count is reduced to zero
  nvme-fc: fix numa_node when dev is null
  nvme-fc: use nr_phys_segments to determine existence of sgl
  nvme-loop: init nvmet_ctrl fatal_err_work when allocate
  nvme: update comment to make the code easier to read
  nvme: put ns_head ref if namespace fails allocation
  nvme-trace: fix cdw10 buffer overrun
  nvme: don't warn on block content change effects
  nvme: add get-feature to admin cmds tracer
  md: Fix failed allocation of md_register_thread
  It's wrong to add len to sector_nr in raid10 reshape twice
  ...
This commit is contained in:
Linus Torvalds 2019-03-16 12:36:39 -07:00
commit 11efae3506
20 changed files with 259 additions and 128 deletions
Download patch file Download diff file Expand all files Collapse all files

15
block/blk-merge.c
View file

@ -180,7 +180,7 @@ static unsigned get_max_segment_size(struct request_queue *q,
*/
static bool bvec_split_segs(struct request_queue *q, struct bio_vec *bv,
unsigned *nsegs, unsigned *last_seg_size,
unsigned *front_seg_size, unsigned *sectors)
unsigned *front_seg_size, unsigned *sectors, unsigned max_segs)
{
unsigned len = bv->bv_len;
unsigned total_len = 0;
@ -190,7 +190,7 @@ static bool bvec_split_segs(struct request_queue *q, struct bio_vec *bv,
* Multi-page bvec may be too big to hold in one segment, so the
* current bvec has to be splitted as multiple segments.
*/
while (len && new_nsegs + *nsegs < queue_max_segments(q)) {
while (len && new_nsegs + *nsegs < max_segs) {
seg_size = get_max_segment_size(q, bv->bv_offset + total_len);
seg_size = min(seg_size, len);
@ -240,6 +240,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q,
bool do_split = true;
struct bio *new = NULL;
const unsigned max_sectors = get_max_io_size(q, bio);
const unsigned max_segs = queue_max_segments(q);
bio_for_each_bvec(bv, bio, iter) {
/*
@ -254,14 +255,14 @@ static struct bio *blk_bio_segment_split(struct request_queue *q,
* Consider this a new segment if we're splitting in
* the middle of this vector.
*/
if (nsegs < queue_max_segments(q) &&
if (nsegs < max_segs &&
sectors < max_sectors) {
/* split in the middle of bvec */
bv.bv_len = (max_sectors - sectors) << 9;
bvec_split_segs(q, &bv, &nsegs,
&seg_size,
&front_seg_size,
&sectors);
&sectors, max_segs);
}
goto split;
}
@ -283,7 +284,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q,
continue;
}
new_segment:
if (nsegs == queue_max_segments(q))
if (nsegs == max_segs)
goto split;
bvprv = bv;
@ -296,7 +297,7 @@ new_segment:
if (nsegs == 1 && seg_size > front_seg_size)
front_seg_size = seg_size;
} else if (bvec_split_segs(q, &bv, &nsegs, &seg_size,
&front_seg_size, &sectors)) {
&front_seg_size, &sectors, max_segs)) {
goto split;
}
}
@ -415,7 +416,7 @@ new_segment:
bvprv = bv;
prev = 1;
bvec_split_segs(q, &bv, &nr_phys_segs, &seg_size,
&front_seg_size, NULL);
&front_seg_size, NULL, UINT_MAX);
}
bbio = bio;
}