I observed the high cpu usage after upgrading from udev-233 to udev-236/udev-238 on Gentoo Linux. Downgrading back to udev-233 lets me use newer kernels (currently running 4.15.18) without any problems.
Using DELL Latitude E6400 from 2009, with same Broadcom Bluetooth module as mentioned above.
I observed the high cpu usage after upgrading from udev-233 to udev-236/udev-238 on Gentoo Linux. Downgrading back to udev-233 lets me use newer kernels (currently running 4.15.18) without any problems.
Using DELL Latitude E6400 from 2009, with same Broadcom Bluetooth module as mentioned above.