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authorLinus Torvalds <torvalds@linux-foundation.org>2018-02-04 22:16:35 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-02-04 22:16:35 +0300
commit64b28683deba132f301d1cecfc25c32e295f53a1 (patch)
treebe38a4e77c530fb129339f983a9d307c60312df8 /drivers/md/dm-rq.c
parentd3658c2266012f270da52e3e0365536e394bd3bd (diff)
parent1d51877578799bfe0fcfe189d8233c9fccf05931 (diff)
downloadlinux-64b28683deba132f301d1cecfc25c32e295f53a1.tar.xz
Merge tag 'for-linus-20180204' of git://git.kernel.dk/linux-block
Pull more block updates from Jens Axboe: "Most of this is fixes and not new code/features: - skd fix from Arnd, fixing a build error dependent on sla allocator type. - blk-mq scheduler discard merging fixes, one from me and one from Keith. This fixes a segment miscalculation for blk-mq-sched, where we mistakenly think two segments are physically contigious even though the request isn't carrying real data. Also fixes a bio-to-rq merge case. - Don't re-set a bit on the buffer_head flags, if it's already set. This can cause scalability concerns on bigger machines and workloads. From Kemi Wang. - Add BLK_STS_DEV_RESOURCE return value to blk-mq, allowing us to distuingish between a local (device related) resource starvation and a global one. The latter might happen without IO being in flight, so it has to be handled a bit differently. From Ming" * tag 'for-linus-20180204' of git://git.kernel.dk/linux-block: block: skd: fix incorrect linux/slab_def.h inclusion buffer: Avoid setting buffer bits that are already set blk-mq-sched: Enable merging discard bio into request blk-mq: fix discard merge with scheduler attached blk-mq: introduce BLK_STS_DEV_RESOURCE
Diffstat (limited to 'drivers/md/dm-rq.c')
-rw-r--r--drivers/md/dm-rq.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index aeaaaef43eff..bf0b840645cc 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -408,7 +408,7 @@ static blk_status_t dm_dispatch_clone_request(struct request *clone, struct requ
clone->start_time = jiffies;
r = blk_insert_cloned_request(clone->q, clone);
- if (r != BLK_STS_OK && r != BLK_STS_RESOURCE)
+ if (r != BLK_STS_OK && r != BLK_STS_RESOURCE && r != BLK_STS_DEV_RESOURCE)
/* must complete clone in terms of original request */
dm_complete_request(rq, r);
return r;
@@ -500,7 +500,7 @@ check_again:
trace_block_rq_remap(clone->q, clone, disk_devt(dm_disk(md)),
blk_rq_pos(rq));
ret = dm_dispatch_clone_request(clone, rq);
- if (ret == BLK_STS_RESOURCE) {
+ if (ret == BLK_STS_RESOURCE || ret == BLK_STS_DEV_RESOURCE) {
blk_rq_unprep_clone(clone);
tio->ti->type->release_clone_rq(clone);
tio->clone = NULL;
@@ -772,7 +772,6 @@ static blk_status_t dm_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
/* Undo dm_start_request() before requeuing */
rq_end_stats(md, rq);
rq_completed(md, rq_data_dir(rq), false);
- blk_mq_delay_run_hw_queue(hctx, 100/*ms*/);
return BLK_STS_RESOURCE;
}