Author Topic: Error detection Module Limit server resources (cgroups) error Invalid argument  (Read 158 times)

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I am performing tests with Cgroups.
I found out that this module has taken the wrong disk parameters. Specifically the MAJ: MIN part of the drive
Config on CWP:
Code: [Select]
blkio {
             blkio.throttle.read_bps_device = "8:33 20971520";
             blkio.throttle.write_bps_device = "8:33 20971520";
         }
In the case of lscgroup error:

Code: [Select]
Error: failed to set /sys/fs/cgroup/blkio/vanthoi/blkio.throttle.read_bps_device: Invalid argument
Error: failed to set /sys/fs/cgroup/blkio/vanthoi/blkio.throttle.write_bps_device: Invalid argument

After searching on google, I found an error caused by MAJ: MIN.
For example, my / home partition is / dev / sdc1 with MAJ: MIN 8:33

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cat / proc / partitions | grep sdc
   8 32 262144000 sdc
   8 33 262142976 sdc1

But to limit the read / write speed on the hard disk, you need to use MAJ: MIN of the non-partition drive.

Config manal:
 
Code: [Select]
blkio {
             blkio.throttle.read_bps_device = "8:32 20971520";
             blkio.throttle.write_bps_device = "8:32 20971520";
         }

I then proceeded to correct MAJ: MIN in the configuration so that everything was resolved.

Send developers to fix this module in the next update.
I am running on CentOS Linux release 7.8.2003
Kernel Version: 3.10.0-1127.13.1.el7.x86_64
« Last Edit: June 30, 2020, 04:48:22 PM by vanthoi »

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hi try to remove cgroup then install it again.

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I have exactly the same problem.

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I have found the problem.

Cgroup/Kernel.org have chage the way to add blkio.throttle.read_bps_device and blkio.throttle.write_bps_device.

Before you add this way

Exampel for /dev/sda2
blkio.throttle.read_bps_device = "8:2 800000";
blkio.throttle.write_bps_device = "8:2 1024000";

The new is this
You add throttle for /dev/sda (the device) and not to the partitions /dev/sda2
blkio.throttle.read_bps_device = "8:0 800000";
blkio.throttle.write_bps_device = "8:0 1024000";

Readme here: https://www.kernel.org/doc/Documentation/cgroup-v1/blkio-controller.txt

Quick fix is to do the following

Code: [Select]
sed -i 's/8:2/8:0/g' /etc/cgconfig.d/* && systemctl restart cgconfig.service
This you need to do every time you change CGroup.