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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-22 15:00:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-22 15:00:11 -0700 |
| commit | 68cf8d0c720cdb76dc912c983d8dae9de6d6e5cf (patch) | |
| tree | 41779dfce5cae3dc495f27f76ed8e66dd046ac4c /block/blk-cgroup.c | |
| parent | 0fbf2cc983ca15208545010863c6536d36a25f3a (diff) | |
| parent | f3cff25f05f2ac29b2ee355e611b0657482f6f1d (diff) | |
| download | kernel-common-68cf8d0c720cdb76dc912c983d8dae9de6d6e5cf.tar.gz kernel-common-68cf8d0c720cdb76dc912c983d8dae9de6d6e5cf.tar.bz2 kernel-common-68cf8d0c720cdb76dc912c983d8dae9de6d6e5cf.zip | |
Merge branch 'for-3.12/core' of git://git.kernel.dk/linux-block
Pull block IO fixes from Jens Axboe:
"After merge window, no new stuff this time only a collection of neatly
confined and simple fixes"
* 'for-3.12/core' of git://git.kernel.dk/linux-block:
cfq: explicitly use 64bit divide operation for 64bit arguments
block: Add nr_bios to block_rq_remap tracepoint
If the queue is dying then we only call the rq->end_io callout. This leaves bios setup on the request, because the caller assumes when the blk_execute_rq_nowait/blk_execute_rq call has completed that the rq->bios have been cleaned up.
bio-integrity: Fix use of bs->bio_integrity_pool after free
blkcg: relocate root_blkg setting and clearing
block: Convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)
block: trace all devices plug operation
Diffstat (limited to 'block/blk-cgroup.c')
| -rw-r--r-- | block/blk-cgroup.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index e90c7c164c83..4e491d9b5292 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -235,8 +235,13 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg, blkg->online = true; spin_unlock(&blkcg->lock); - if (!ret) + if (!ret) { + if (blkcg == &blkcg_root) { + q->root_blkg = blkg; + q->root_rl.blkg = blkg; + } return blkg; + } /* @blkg failed fully initialized, use the usual release path */ blkg_put(blkg); @@ -335,6 +340,15 @@ static void blkg_destroy(struct blkcg_gq *blkg) rcu_assign_pointer(blkcg->blkg_hint, NULL); /* + * If root blkg is destroyed. Just clear the pointer since root_rl + * does not take reference on root blkg. + */ + if (blkcg == &blkcg_root) { + blkg->q->root_blkg = NULL; + blkg->q->root_rl.blkg = NULL; + } + + /* * Put the reference taken at the time of creation so that when all * queues are gone, group can be destroyed. */ @@ -360,13 +374,6 @@ static void blkg_destroy_all(struct request_queue *q) blkg_destroy(blkg); spin_unlock(&blkcg->lock); } - - /* - * root blkg is destroyed. Just clear the pointer since - * root_rl does not take reference on root blkg. - */ - q->root_blkg = NULL; - q->root_rl.blkg = NULL; } /* @@ -970,8 +977,6 @@ int blkcg_activate_policy(struct request_queue *q, ret = PTR_ERR(blkg); goto out_unlock; } - q->root_blkg = blkg; - q->root_rl.blkg = blkg; list_for_each_entry(blkg, &q->blkg_list, q_node) cnt++; |