-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On Sun, 28 Feb 2016 12:19:43 +0100 Anders Nylander <randomsa...@gmail.com> wrote:
> Following the removal of of the USB device, I noticed very high CPU usage > being caused by kworker and ksoftirqd. > Using perf to log 10s of data and then reading the report, I noticed that > xhci_hcd/xhci_hub_control was generating a LOT of work for the kworker > (~42%). I'm experiencing a very similar behavior on my ThinkPad X250 attached to a dock. It doesn't happen every time I resume, but quite often these days (on 4.18.8-1). Unplugging an USB3 disk plugged to the dock fixed the problem for me, and replugging it worked as well, so maybe there's some kind of loop I managed to break with that. I also noticed https://bugzilla.redhat.com/show_bug.cgi?id=1325488 on the exact same setup, but there's no other info there. I'll try to dig upstream, but unfortunately it's not that easily reproducible here. Regards, - -- Yves-Alexis -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEE8vi34Qgfo83x35gF3rYcyPpXRFsFAluqfCEACgkQ3rYcyPpX RFtQ6ggA36IjHB87mtIr2ciKDn2DY5afR2oWQ1zlmKXBRQBwVTSxxVFOJ/HP8Mhi flNOTgChEDjs9+cZiWAPxfJkEpbJBkXxVrios0/eRaV5drpCh5oo3h40ln1E4H+M 6ouvDvKtOo8szqJppE2ATYIZ3uXknaN53b2bDAUvjuPHTp688vk47hTCL3rPjVTL LQifiMHWQcqixodBZTh+uQxdDDjKrQ7bVY0gUjAEEkQq/2wgAm1RFtYtHAMfvfek 6gWmQ58mRsaEVTWPaLqSBhybEfvw8djlNo4sp2F/rT/0Hzp1OCIrzbQDUnGB9ttP VF//XAvs8/5ChbhMPNXNRCkS6CFxBw== =EgQP -----END PGP SIGNATURE-----
