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 v4.7-rc1 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/v4.7-rc1-yakkety/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1589418 Title: udisksd high CPU usage Status in linux package in Ubuntu: Incomplete Bug description: Using: libudisks2-0:amd64 2.1.6-2ubuntu1 Ubuntu 4.2.0-36.42-generic 4.2.8-ckt8 Description: Ubuntu 15.10 Release: 15.10 When I add USB drives to my system I end-up with udisksd using 100% of a core shortly after. After some time this goes up to 200% (in one step), so using 2 cores. Thread view shows CPU time of CMD 'pool': # ps -T -p <pid-of-udisksd> PID SPID TTY TIME CMD 26229 26229 ? 00:00:00 udisksd 26229 26230 ? 00:00:00 gmain 26229 26232 ? 00:00:00 gdbus 26229 26233 ? 00:00:00 probing-thread 26229 26234 ? 00:00:00 cleanup 26229 3325 ? 00:33:16 pool 26229 5027 ? 00:03:00 pool My solution is to kill it and let it restart. Strace needs to follow threads to show activity, it's then flooding with: # strace -p <udisksd-pid> -f [pid 3325] poll([{fd=12, events=POLLIN}, {fd=17, events=POLLOUT}, {fd=18, events=POLLIN}, {fd=20, events=POLLIN}], 4, 0) = 2 ([{fd=12, revents=POLLIN}, {fd=17, revents=POLLOUT}]) [pid 3325] read(12, "\2\0\0\0\0\0\0\0", 16) = 8 [pid 3325] write(12, "\1\0\0\0\0\0\0\0", 8) = 8 [pid 3325] write(2, "\n(udisksd:26229): GLib-WARNING *"..., 87) = 87 [pid 3325] write(12, "\1\0\0\0\0\0\0\0", 8) = 8 [pid 3325] poll([{fd=12, events=POLLIN}, {fd=17, events=POLLOUT}, {fd=18, events=POLLIN}, {fd=20, events=POLLIN}], 4, 0) = 2 ([{fd=12, revents=POLLIN}, {fd=17, revents=POLLOUT}]) [pid 3325] read(12, "\2\0\0\0\0\0\0\0", 16) = 8 [pid 3325] write(12, "\1\0\0\0\0\0\0\0", 8) = 8 [pid 3325] write(2, "\n(udisksd:26229): GLib-WARNING *"..., 87) = 87 [pid 3325] write(12, "\1\0\0\0\0\0\0\0", 8) = 8 [pid 3325] poll([{fd=12, events=POLLIN}, {fd=17, events=POLLOUT}, {fd=18, events=POLLIN}, {fd=20, events=POLLIN}], 4, 0) = 2 ([{fd=12, revents=POLLIN}, {fd=17, revents=POLLOUT}]) [pid 3325] read(12, "\2\0\0\0\0\0\0\0", 16) = 8 [pid 3325] write(12, "\1\0\0\0\0\0\0\0", 8) = 8 [pid 3325] write(2, "\n(udisksd:26229): GLib-WARNING *"..., 87) = 87 [pid 3325] write(12, "\1\0\0\0\0\0\0\0", 8) = 8 [pid 3325] poll([{fd=12, events=POLLIN}, {fd=17, events=POLLOUT}, {fd=18, events=POLLIN}, {fd=20, events=POLLIN}], 4, 0) = 2^CProcess 26229 detached THANKS! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1589418/+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
