Reading boot messages on the fly

[Bill Nottingham]

Jay Cliburn (jacliburn at bellsouth.net) said: 
> I've been experimenting with different methods for reading messages that 
> scroll by rapidly during boot.  Several days ago on fedora-list, Dave Jones 
> advised someone to use boot_delay=500 on the kernel command line to 
> introduce a delay between boot messages.  I tried this, and it works really 
> well to a point, however once the kernel frees init memory, something 
> happens and the scroll speed returns to normal (which is very, very fast).
> 
> powernow-k8:    0 : fid 0xa (1800 MHz), vid 0x6
> powernow-k8:    1 : fid 0x2 (1000 MHz), vid 0x12
> ACPI: (supports S0 S3 S4 S5)
> Freeing unused kernel memory: 212k freed    <-------- Last "slow" message
> Losing some ticks... checking if CPU frequency changed.
> Write protecting the kernel read-only data: 477k
> input: AT Translated Set 2 keyboard as /class/input/input0
> USB Universal Host Controller Interface driver v3.0

boot_delay affects kernel messages only; it does not affect userspace
messages (such as the initrd, etc.).

Bill