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authorTejun Heo <tj@kernel.org>2012-04-01 12:30:01 -0700
committerTejun Heo <tj@kernel.org>2012-04-01 12:55:00 -0700
commit959d851caa48829eb85cb85aa949fd6b4c5d5bc6 (patch)
tree3ba9c94ec346275fb44c4f0d1cd2537cdff8d811 /block/blk-ioc.c
parenta5567932fc926739e29e98487128080f40c61710 (diff)
parent48ddbe194623ae089cc0576e60363f2d2e85662a (diff)
downloadlwn-959d851caa48829eb85cb85aa949fd6b4c5d5bc6.tar.gz
lwn-959d851caa48829eb85cb85aa949fd6b4c5d5bc6.zip
Merge branch 'for-3.5' of ../cgroup into block/for-3.5/core-merged
cgroup/for-3.5 contains the following changes which blk-cgroup needs to proceed with the on-going cleanup. * Dynamic addition and removal of cftypes to make config/stat file handling modular for policies. * cgroup removal update to not wait for css references to drain to fix blkcg removal hang caused by cfq caching cfqgs. Pull in cgroup/for-3.5 into block/for-3.5/core. This causes the following conflicts in block/blk-cgroup.c. * 761b3ef50e "cgroup: remove cgroup_subsys argument from callbacks" conflicts with blkiocg_pre_destroy() addition and blkiocg_attach() removal. Resolved by removing @subsys from all subsys methods. * 676f7c8f84 "cgroup: relocate cftype and cgroup_subsys definitions in controllers" conflicts with ->pre_destroy() and ->attach() updates and removal of modular config. Resolved by dropping forward declarations of the methods and applying updates to the relocated blkio_subsys. * 4baf6e3325 "cgroup: convert all non-memcg controllers to the new cftype interface" builds upon the previous item. Resolved by adding ->base_cftypes to the relocated blkio_subsys. Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'block/blk-ioc.c')
-rw-r--r--block/blk-ioc.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 3f3dd51a1280..1e2d53b04858 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -130,6 +130,7 @@ static void ioc_release_fn(struct work_struct *work)
void put_io_context(struct io_context *ioc)
{
unsigned long flags;
+ bool free_ioc = false;
if (ioc == NULL)
return;
@@ -144,8 +145,13 @@ void put_io_context(struct io_context *ioc)
spin_lock_irqsave(&ioc->lock, flags);
if (!hlist_empty(&ioc->icq_list))
schedule_work(&ioc->release_work);
+ else
+ free_ioc = true;
spin_unlock_irqrestore(&ioc->lock, flags);
}
+
+ if (free_ioc)
+ kmem_cache_free(iocontext_cachep, ioc);
}
EXPORT_SYMBOL(put_io_context);