how does an initramfs handle the "root=" boot time param?

["Robert P. J. Day" <rpjday@xxxxxxxxxxxxxx>]

  i'm reading the "init" script contained in my current kernel's
initramfs, and i can see how installing that kernel ran a post-install
script that created "init" and hard-coded it to refer to my actual
root filesystem.

  so what happens when i boot and specify an alternate root FS with
"root="?  somehow, that has to override the hardcoded partition name
in "init", no?  when is that done?  thanks.

rday

-- 
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Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

http://crashcourse.ca
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