Commit 13e5c52d authored by wangyigen's avatar wangyigen Committed by wangyigen
Browse files

cgroup_writeback: bind blkcg and memcg 

referenceDist inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I9JEA3


CVE: not cve

-------------------------------

The below process requires manual binding of memcg and blkcg
Previous bufferI/O speed limit schemes for OpenEuler:
commit 644547a9 ("cgroup: support cgroup writeback on cgroupv1")
commit 5a8638d6 ("cgroup: Add cgroup1_get_from_id()")
The test is as follows:
1. Start a Docker（Firstly, you need to obtain a Docker image）
docker run ti -- rm mtos: latest bash
2. Obtain the cgroupid of the Docker
stat /sys/fs/cgroup/blkio/docker/{docker_id}
3. It is necessary to manually bind memcg and blkcg
echo ${blk_inde_id} > \
/sys/fs/cgroup/blkio/docker/{docker_id}/memory.wb_blkio_ino
4. Speed limit
echo 253:0 209715200 > \
/sys/fs/cgroup/blkio/docker/{docker_id}/blkio. throttle. writebps device
5 Speed measurement
Running in Docker
dd if=/dev/zero of=/ Testfile bs=4k count=10000
Local operation
iostat - xz 1
I refer to the solution provided by Alibaba:
automatically bind memcg and blkcg every time
cgroup_migrate_execute is executed

Signed-off-by: default avatarwangyigen <ygw111@yeah.net>
parent fca9656c

arch/arm64/configs/openeuler_defconfig

+1 −0
Original line number Diff line number Diff line
@@ -153,6 +153,7 @@ CONFIG_MEMCG_MEMFS_INFO=y 
CONFIG_BLK_CGROUP=y

CONFIG_CGROUP_WRITEBACK=y

CONFIG_CGROUP_V1_WRITEBACK=y

CONFIG_CGROUP_V1_BIND_BLKCG_MEMCG=y

CONFIG_CGROUP_SCHED=y

CONFIG_QOS_SCHED=y

CONFIG_QOS_SCHED_MULTILEVEL=y

arch/x86/configs/openeuler_defconfig

+1 −0
Original line number Diff line number Diff line
@@ -158,6 +158,7 @@ CONFIG_MEMCG_MEMFS_INFO=y 
CONFIG_BLK_CGROUP=y

CONFIG_CGROUP_WRITEBACK=y

CONFIG_CGROUP_V1_WRITEBACK=y

CONFIG_CGROUP_V1_BIND_BLKCG_MEMCG=y

CONFIG_CGROUP_SCHED=y

CONFIG_QOS_SCHED=y

CONFIG_QOS_SCHED_MULTILEVEL=y

include/linux/backing-dev.h

+9 −0
Original line number Diff line number Diff line
@@ -359,6 +359,10 @@ static inline void unlocked_inode_to_wb_end(struct inode *inode, 
	rcu_read_unlock();

}





void bind_memcg_blkcg_link(struct cgroup_subsys *ss,

			     struct css_set *cset);



#else	/* CONFIG_CGROUP_WRITEBACK */



static inline bool inode_cgwb_enabled(struct inode *inode)
@@ -411,6 +415,11 @@ static inline int inode_congested(struct inode *inode, int cong_bits) 
	return wb_congested(&inode_to_bdi(inode)->wb, cong_bits);

}



static inline void bind_memcg_blkcg_link(struct cgroup_subsys *ss,

					   struct css_set *cset)

{

}



#endif	/* CONFIG_CGROUP_WRITEBACK */



static inline int inode_read_congested(struct inode *inode)

init/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -993,6 +993,11 @@ config CGROUP_V1_WRITEBACK 
	depends on CGROUP_WRITEBACK

	default n



config CGROUP_V1_BIND_BLKCG_MEMCG

        bool "Add switches to bind memcg and blkcg"

        depends on CGROUP_V1_WRITEBACK

        default n



menuconfig CGROUP_SCHED

	bool "CPU controller"

	default n

kernel/cgroup/cgroup.c

+10 −0
Original line number Diff line number Diff line
@@ -83,6 +83,12 @@ 
DEFINE_MUTEX(cgroup_mutex);

DEFINE_SPINLOCK(css_set_lock);



#ifdef CONFIG_CGROUP_V1_BIND_BLKCG_MEMCG

int sysctl_bind_memcg_blkcg_enable = 1;

#else

int sysctl_bind_memcg_blkcg_enable;

#endif



#ifdef CONFIG_PROVE_RCU

EXPORT_SYMBOL_GPL(cgroup_mutex);

EXPORT_SYMBOL_GPL(css_set_lock);
@@ -2558,6 +2564,10 @@ static int cgroup_migrate_execute(struct cgroup_mgctx *mgctx) 
				tset->ssid = ssid;

				ss->attach(tset);

			}

			if (sysctl_bind_memcg_blkcg_enable) {

				list_for_each_entry(cset, &tset->dst_csets, mg_node)

					bind_memcg_blkcg_link(ss, cset);

			}

		} while_each_subsys_mask();

	}