Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.10 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10-rc7 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1662573 Title: bcache ioutil to 100% needs node reboot (no kern logs related) Status in linux package in Ubuntu: Incomplete Bug description: 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1662573/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
