Mounting blkio cgroup hierarchy

Any ideas?

I've been trying to configure cgroups and have encountered some very strange behavior. In particular, when I follow the instructions in Documentation/cgroups/blkio-controller.txt I quickly reach an error,

$ cd /mnt
$ sudo mkdir -p cgroups/blkio
$ # Confirm it's not already mounted:
$ cat /proc/mounts
$ sudo mount -t cgroup -o blkio none /mnt/cgroups/blkio

mount: special device none does not exist

I've done quite a bit of Googling and yet it's very difficult to find good information on configuring cgroups. I would use the libcg toolset[1] but every attempt to configure it has ended in frustratingly vague error messages.

Any ideas?

Any ideas?

I've been trying to configure cgroups and have encountered some very strange behavior. In particular, when I follow the instructions in Documentation/cgroups/blkio-controller.txt I quickly reach an error,

$ cd /mnt
$ sudo mkdir -p cgroups/blkio
$ # Confirm it's not already mounted:
$ cat /proc/mounts
rootfs / rootfs rw 0 0
none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
none /proc proc rw,nosuid,nodev,noexec,relatime 0 0
none /dev devtmpfs rw,relatime,size=1993264k,nr_inodes=498316,mode=755 0 0
none /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
/dev/disk/by-uuid/7d908a9f-fe46-4a82-bb2b-3fc108c96280 / ext4 rw,relatime,errors=remount-ro,barrier=1,data=ordered 0 0
none /sys/kernel/debug debugfs rw,relatime 0 0
none /sys/kernel/security securityfs rw,relatime 0 0
none /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0
none /var/run tmpfs rw,nosuid,relatime,mode=755 0 0
none /var/lock tmpfs rw,nosuid,nodev,noexec,relatime 0 0
/dev/sda1 /boot ext4 rw,relatime,barrier=1,data=ordered 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nosuid,nodev,noexec,relatime 0 0
gvfs-fuse-daemon /home/ben/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,relatime,user_id=1000,group_id=1000 0 0
$ sudo mount -t cgroup -o blkio none /mnt/cgroups/blkio
mount: special device none does not exist

I've done quite a bit of Googling and yet it's very difficult to find good information on configuring cgroups. I would use the libcg toolset[1] but every attempt to configure it has ended in frustratingly vague error messages.

I've been trying to configure cgroups and have encountered some very strange behavior. In particular, when I follow the instructions in Documentation/cgroups/blkio-controller.txt I quickly reach an error,

$ cd /mnt
$ sudo mkdir -p cgroups/blkio
$ # Confirm it's not already mounted:
$ cat /proc/mounts
$ sudo mount -t cgroup -o blkio none /mnt/cgroups/blkio

mount: special device none does not exist

I've done quite a bit of Googling and yet it's very difficult to find good information on configuring cgroups. I would use the libcg toolset[1] but every attempt to configure it has ended in frustratingly vague error messages.

Any ideas?

Quoted 9 lines · Ben Gamari

I've been trying to configure cgroups and have encountered some very strange behavior. In particular, when I follow the instructions in Documentation/cgroups/blkio-controller.txt I quickly reach an error,

$ cd /mnt
$ sudo mkdir -p cgroups/blkio
$ # Confirm it's not already mounted:
$ cat /proc/mounts
$ sudo mount -t cgroup -o blkio none /mnt/cgroups/blkio

...

Quoted 7 lines

mount: special device none does not exist

I've done quite a bit of Googling and yet it's very difficult to find good information on configuring cgroups. I would use the libcg toolset[1] but every attempt to configure it has ended in frustratingly vague error messages.

Quoted 2 lines

Any ideas?

I suspect you didn't have blkio enabled in your kernel config.

Quoted 9 lines · Ben Gamari

I've been trying to configure cgroups and have encountered some very strange behavior. In particular, when I follow the instructions in Documentation/cgroups/blkio-controller.txt I quickly reach an error,

$ cd /mnt
$ sudo mkdir -p cgroups/blkio
$ # Confirm it's not already mounted:
$ cat /proc/mounts
$ sudo mount -t cgroup -o blkio none /mnt/cgroups/blkio

...

Quoted 7 lines

mount: special device none does not exist

I've done quite a bit of Googling and yet it's very difficult to find good information on configuring cgroups. I would use the libcg toolset[1] but every attempt to configure it has ended in frustratingly vague error messages.

Quoted 2 lines

Any ideas?

I suspect you didn't have blkio enabled in your kernel config.