[syslinux] Append boot device to /proc/cmdline

[Bernd Blaauw]

Op 28-11-2009 6:57, H. Peter Anvin schreef:
> Hmmm... Syslinux already provides the filesystem type it is booted from
> via the bootloader ID; there is some additional information that it can
> provide, e.g. device type (fd,hd,cdrom,pxe), bios number, and partition
> offset (if applicable for the device type.)  This doesn't automatically
> map 1:1 onto the Linux device mappings, but it's probably the best that
> one can do.
>    

Memdisk-ISO means a hdd-booted (or USB-stick for that matter) ISO (in 
RAM) won't show you booted from harddisk if the ISO-image contains 
isolinux. It then shows last-used-bootloader-ID, which would be 
Isolinux, which then incorrectly implies you booted from physical CD 
(and thus are in trouble as CD drivers won't find any device, nor 
scripts will find the remainder of files on a disc in physical CD drive).