Hi,
Looks like kernel config CONFIG_USB_STORAGE_DEBUG=y has been set in the Debian Jessie 4.0.4 build. That means, that when I have I/O to a usb-storage device, systemd-journald is consuming ~70-90% CPU time on consuming debug log lines from the kernel.
Is this by purpose? How would I be able to filter or disable all this log content from the kernel to journald?