From: Shaohua Li <[email protected]> Hi,
The IO dispatched to under layer disk by loop block device isn't cloned from original bio, so the IO loses cgroup information of original bio. These IO escapes from cgroup control. The patches try to address this issue. The idea is quite generic, but we currently only make it work for blkcg. Thanks, Shaohua V2->V3: - Make the API more robust pointed out by Tejun V1->V2: - Address a couple of issues pointed out by Tejun Shaohua Li (4): kthread: add a mechanism to store cgroup info blkcg: delete unused APIs block: make blkcg aware of kthread stored original cgroup info block/loop: make loop cgroup aware block/bio.c | 31 ---------------------- drivers/block/loop.c | 13 +++++++++ drivers/block/loop.h | 1 + include/linux/bio.h | 2 -- include/linux/blk-cgroup.h | 25 +++++------------- include/linux/kthread.h | 11 ++++++++ kernel/kthread.c | 66 ++++++++++++++++++++++++++++++++++++++++++++-- 7 files changed, 96 insertions(+), 53 deletions(-) -- 2.9.5
