[syslinux] cptime/memdisk block size

[H. Peter Anvin]

On 09/21/2012 11:31 PM, Bernd Blaauw wrote:
> Op 22-9-2012 0:58, H. Peter Anvin schreef:
> 
>> MEMDISK doesn't load anything.  Syslinux loads things, and uses a block
>> size of (typically) 63.5K which is the maximum supported by EDD 3.0.
> 
> Thank you very much for stating this performance limitation to syslinux
> core, and likely linux.c32 module as well. I'll refrain from loading too
> large ISO/harddisk images this way and stick with operating systems that
> support ramdisk loading on their own, like PartedMagic or Knoppix
> ("knoppix64 toram").
> 

It's not "of the Syslinux core", it is a limitation of the EDD interface
in BIOS.  EDD 4 (or UEFI when used in native mode) lifts this
limitation, but there are very few if any EDD 4 implementations on the
market at the moment.

	-hpa