Public bug reported: bcache (bcache0 in this sample) ioutil goes to 100% and avgqu-sz also gets affected. Bcache slaves don't get affected, but does affect storage performance.
See excerpt (bcache0): http://pastebin.ubuntu.com/23948463/ * Bcache blocks are running Ceph OSDs. * HW is PowerEdge R730xd * Kernel version is: 4.4.0-51-generic * Ubuntu 14.04.5 LTS * bcache-tools 1.0.7-1~14.04.1 Please let me know if you would need further detail. ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete ** Tags: canonical-bootstack -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1662573 Title: bcache ioutil to 100% needs node reboot (no kern logs related) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1662573/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
