Some more information about the crash kernel parameters:
Since kernel v4.5, the correct parameter to disable USB subsystem
initialization is "usbcore.nousb" always (instead of "nousb" in case
the subsystem is built-in). This was changed by commit 097a9ea0e48
("usb: make "nousb" a clear module parameter").
We need to take this into account in kdump-tools, or else we may boot
with USB in kdump even the command-line saying the opposite.
The "reset_devices" parameter hints the drivers that they may be
booting from a non-healthy condition and need to issue a reset to the
adapter. Drivers that currently implement this feature are (kernel
v4.19): hpsa, ipr, megaraid_sas, mpt3sas, smartpqi, xenbus.
