Messages in this thread | | | Date | Mon, 3 Oct 2011 20:39:23 +0200 | Subject | cgroup blkio bug/feedback | From | " " <> |
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I've been testing cgroup blkio controller in production eviroment for many days now especialy blkio.throttle.write_iops_device and blkio.throttle.read_iops_device. I'm using software raid so I have to limit on devices like /dev/md2 which is 9:2 in my system. Limiting works fine but every some time whole system overloads and only thing to do is hard reboot. For two times this happened with cgroup that was used to limit rsync-ing about 30GB of data. Somewhere in the middle loadavg starts to rise quicly, shell hangs at every kill command and soft reboot does not work. When I do echo "9:2 0" > blkio.throttle.read_iops_device and echo "9:2 0" > blkio.throttle.write_iops_device problem was immeadetly gone. Unfortunetly I don't know how to get more information about this durring such overload time, especialy since many commands does not work (disk access however works fine during that time). So its more of a feedback than a bug report unfortunately.
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