Since the update for Linux 2.6.8-rc1, which makes use of 'early_param',
you will see the following message similar to the following (example
taken from i386) if you pass 'kgdbwait' on the command line:
"Uncompressing Linux... Ok, booting the kernel."
If you don't pass 'kgdbwait' and connect to the target via serial or
ethernet, or use SysRq-G, you will see the following explicit message, on
all architectures:
"Waiting for connection from remote GDB"