mem= parameter, 2.4.18 vs 2.4.24

[Jan Knutar]

Just upgraded an old computer from 2.4.18 to 2.4.24. The system has 24M 
ram, but the bios reports only 16.

Discovered that mem=24M doesn't let Linux use all of it, like in 2.4.18, 
only 16M in 2.4.24.

mem=8M@16M has the desired result, making the whole incredibly large 24M 
ram available :-)

RTFSing leads me to believe that mem=xxxM can only limit ram size, but 
Documentation/memory.txt and Documentation/kernel-parameters.txt make 
me think ram=24M should work like it did in 2.4.18.  I'm guessing 
nobody updated the documentation? :)

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