From: Shaohua Li <shli@xxxxxx> 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 Shaohua Li (3): kthread: add a mechanism to store cgroup info 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 | 13 +++++++++++ include/linux/sched.h | 1 + kernel/kthread.c | 57 +++++++++++++++++++++++++++++++++++++++++++++- 8 files changed, 91 insertions(+), 52 deletions(-) -- 2.9.5
