On 2016/9/2 17:12, Sverd Johnsen wrote: > Hi! I'am on 4.4.19 (arm) and seem to have all requirements for CPU > cgroups build into the kernel: > > # zgrep -P "CGROUP|GROUP|FAIR" /proc/config.gz > CONFIG_CGROUPS=y > # CONFIG_CGROUP_DEBUG is not set > # CONFIG_CGROUP_FREEZER is not set > CONFIG_CGROUP_PIDS=y > CONFIG_CGROUP_DEVICE=y > CONFIG_CGROUP_CPUACCT=y > # CONFIG_CGROUP_PERF is not set > CONFIG_CGROUP_SCHED=y > CONFIG_FAIR_GROUP_SCHED=y > CONFIG_RT_GROUP_SCHED=y > CONFIG_BLK_CGROUP=y > # CONFIG_DEBUG_BLK_CGROUP is not set > # CONFIG_SCHED_AUTOGROUP is not set > CONFIG_CFQ_GROUP_IOSCHED=y > # CONFIG_NET_CLS_CGROUP is not set > # CONFIG_CGROUP_NET_PRIO is not set > # CONFIG_CGROUP_NET_CLASSID is not set > # CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE is not set > # CONFIG_THERMAL_GOV_FAIR_SHARE is not set > > Other cgroups also work: > > # findmnt -a > TARGET SOURCE > FSTYPE OPTIONS > |-/sys sysfs > sysfs rw,nosuid,nodev,noexec,relatime > | |-/sys/kernel/security securityfs > securityfs rw,nosuid,nodev,noexec,relatime > | |-/sys/fs/cgroup tmpfs > tmpfs ro,nosuid,nodev,noexec,mode=755 > | | |-/sys/fs/cgroup/systemd cgroup > cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd > | | |-/sys/fs/cgroup/devices cgroup > cgroup rw,nosuid,nodev,noexec,relatime,devices > | | |-/sys/fs/cgroup/blkio cgroup > cgroup rw,nosuid,nodev,noexec,relatime,blkio > | | |-/sys/fs/cgroup/pids cgroup > cgroup rw,nosuid,nodev,noexec,relatime,pids > | | `-/sys/fs/cgroup/cpuacct cgroup > cgroup rw,nosuid,nodev,noexec,relatime,cpuacct > > However I get this: > > # dmesg | egrep "cgroup|control group" > [ 0.000000] Initializing cgroup subsys cpu > [ 0.000000] Initializing cgroup subsys cpuacct > [ 0.001242] Disabling cpu control group subsystem dmesg | grep "Command line", and then I guess we'll get to know why. > [ 0.001263] Initializing cgroup subsys io > [ 0.001289] Initializing cgroup subsys devices > [ 0.001304] Initializing cgroup subsys pids > > # column -t /proc/cgroups > #subsys_name hierarchy num_cgroups enabled > cpu 0 1 0 > cpuacct 5 59 1 > blkio 3 9 1 > devices 2 56 1 > pids 4 64 1 > > Why? really weird. I control the boot process (systemd 231) > and nothing there apparently disables it. When I try to mount cpu > cgroup manually I just > get ENOENT -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
