AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

io-controller: Document for blkio.weight_device

Browse Source 
Here is the document for blkio.weight_device

Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Gui Jianfeng 2010-04-13 16:07:50 +08:00 committed by Jens Axboe
parent 34d0f179d6
commit da69da184c
1 changed files with 30 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
Documentation/cgroups/blkio-controller.txt
View File

@ -76,9 +76,38 @@ CONFIG_DEBUG_BLK_CGROUP
Details of cgroup files Details of cgroup files
======================= =======================
- blkio.weight - blkio.weight
- Specifies per cgroup weight. - Specifies per cgroup weight. This is default weight of the group
on all the devices until and unless overridden by per device rule.
(See blkio.weight_device).
Currently allowed range of weights is from 100 to 1000. Currently allowed range of weights is from 100 to 1000.
- blkio.weight_device
- One can specify per cgroup per device rules using this interface.
These rules override the default value of group weight as specified
by blkio.weight.
Following is the format.
#echo dev_maj:dev_minor weight > /path/to/cgroup/blkio.weight_device
Configure weight=300 on /dev/sdb (8:16) in this cgroup
# echo 8:16 300 > blkio.weight_device
# cat blkio.weight_device
dev weight
8:16 300
Configure weight=500 on /dev/sda (8:0) in this cgroup
# echo 8:0 500 > blkio.weight_device
# cat blkio.weight_device
dev weight
8:0 500
8:16 300
Remove specific weight for /dev/sda in this cgroup
# echo 8:0 0 > blkio.weight_device
# cat blkio.weight_device
dev weight
8:16 300
- blkio.time - blkio.time
- disk time allocated to cgroup per device in milliseconds. First - disk time allocated to cgroup per device in milliseconds. First
two fields specify the major and minor number of the device and two fields specify the major and minor number of the device and