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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-10 20:06:54 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-10 20:06:54 +0300 |
commit | 8df2a0a6da450b0fc28f1fed110817c1d98b84c2 (patch) | |
tree | b1f741ff9f6f03ddf8a90f6447b6920638d9858c /block | |
parent | 172edde9604941f61d75bb3b4f88068204f8c086 (diff) | |
parent | cb6b771b05c3026a85ed4817c1b87c5e6f41d136 (diff) |
Merge tag 'block-5.7-2020-04-10' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Here's a set of fixes that should go into this merge window. This
contains:
- NVMe pull request from Christoph with various fixes
- Better discard support for loop (Evan)
- Only call ->commit_rqs() if we have queued IO (Keith)
- blkcg offlining fixes (Tejun)
- fix (and fix the fix) for busy partitions"
* tag 'block-5.7-2020-04-10' of git://git.kernel.dk/linux-block:
block: fix busy device checking in blk_drop_partitions again
block: fix busy device checking in blk_drop_partitions
nvmet-rdma: fix double free of rdma queue
blk-mq: don't commit_rqs() if none were queued
nvme-fc: Revert "add module to ops template to allow module references"
nvme: fix deadlock caused by ANA update wrong locking
nvmet-rdma: fix bonding failover possible NULL deref
loop: Better discard support for block devices
loop: Report EOPNOTSUPP properly
nvmet: fix NULL dereference when removing a referral
nvme: inherit stable pages constraint in the mpath stack device
blkcg: don't offline parent blkcg first
blkcg: rename blkcg->cgwb_refcnt to ->online_pin and always use it
nvme-tcp: fix possible crash in recv error flow
nvme-tcp: don't poll a non-live queue
nvme-tcp: fix possible crash in write_zeroes processing
nvmet-fc: fix typo in comment
nvme-rdma: Replace comma with a semicolon
nvme-fcloop: fix deallocation of working context
nvme: fix compat address handling in several ioctls
Diffstat (limited to 'block')
-rw-r--r-- | block/blk-cgroup.c | 22 | ||||
-rw-r--r-- | block/blk-mq.c | 9 | ||||
-rw-r--r-- | block/partitions/core.c | 2 |
3 files changed, 26 insertions, 7 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index c15a26096038..c5dc833212e1 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -883,8 +883,8 @@ static void blkcg_css_offline(struct cgroup_subsys_state *css) /* this prevents anyone from attaching or migrating to this blkcg */ wb_blkcg_offline(blkcg); - /* put the base cgwb reference allowing step 2 to be triggered */ - blkcg_cgwb_put(blkcg); + /* put the base online pin allowing step 2 to be triggered */ + blkcg_unpin_online(blkcg); } /** @@ -983,11 +983,11 @@ blkcg_css_alloc(struct cgroup_subsys_state *parent_css) } spin_lock_init(&blkcg->lock); + refcount_set(&blkcg->online_pin, 1); INIT_RADIX_TREE(&blkcg->blkg_tree, GFP_NOWAIT | __GFP_NOWARN); INIT_HLIST_HEAD(&blkcg->blkg_list); #ifdef CONFIG_CGROUP_WRITEBACK INIT_LIST_HEAD(&blkcg->cgwb_list); - refcount_set(&blkcg->cgwb_refcnt, 1); #endif list_add_tail(&blkcg->all_blkcgs_node, &all_blkcgs); @@ -1006,6 +1006,21 @@ unlock: return ret; } +static int blkcg_css_online(struct cgroup_subsys_state *css) +{ + struct blkcg *blkcg = css_to_blkcg(css); + struct blkcg *parent = blkcg_parent(blkcg); + + /* + * blkcg_pin_online() is used to delay blkcg offline so that blkgs + * don't go offline while cgwbs are still active on them. Pin the + * parent so that offline always happens towards the root. + */ + if (parent) + blkcg_pin_online(parent); + return 0; +} + /** * blkcg_init_queue - initialize blkcg part of request queue * @q: request_queue to initialize @@ -1199,6 +1214,7 @@ static void blkcg_exit(struct task_struct *tsk) struct cgroup_subsys io_cgrp_subsys = { .css_alloc = blkcg_css_alloc, + .css_online = blkcg_css_online, .css_offline = blkcg_css_offline, .css_free = blkcg_css_free, .can_attach = blkcg_can_attach, diff --git a/block/blk-mq.c b/block/blk-mq.c index f6291ceedee4..8e56884fd2e9 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1289,7 +1289,7 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list, * the driver there was more coming, but that turned out to * be a lie. */ - if (q->mq_ops->commit_rqs) + if (q->mq_ops->commit_rqs && queued) q->mq_ops->commit_rqs(hctx); spin_lock(&hctx->lock); @@ -1911,6 +1911,8 @@ blk_status_t blk_mq_request_issue_directly(struct request *rq, bool last) void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx, struct list_head *list) { + int queued = 0; + while (!list_empty(list)) { blk_status_t ret; struct request *rq = list_first_entry(list, struct request, @@ -1926,7 +1928,8 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx, break; } blk_mq_end_request(rq, ret); - } + } else + queued++; } /* @@ -1934,7 +1937,7 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx, * the driver there was more coming, but that turned out to * be a lie. */ - if (!list_empty(list) && hctx->queue->mq_ops->commit_rqs) + if (!list_empty(list) && hctx->queue->mq_ops->commit_rqs && queued) hctx->queue->mq_ops->commit_rqs(hctx); } diff --git a/block/partitions/core.c b/block/partitions/core.c index b79c4513629b..bc1ded1331b1 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -496,7 +496,7 @@ int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev) if (!disk_part_scan_enabled(disk)) return 0; - if (bdev->bd_part_count || bdev->bd_super) + if (bdev->bd_part_count || bdev->bd_openers > 1) return -EBUSY; res = invalidate_partition(disk, 0); if (res) |