Query regarding kernel memory

[Vaibhav Jain]

Hi,

I read a few articles on linux virtual memory management such as this one :
http://lwn.net/Articles/75174/

which say that earlier linux kernel could only use memory slightly below 1
GB. They have
given the reason for it but I am unable to understand.They further describe
the use of High memory and low memory.
Could anybody please explain the reason for kernel not being able to use the
1 GB completely?
Also please provide references for high memory and low memory.


Thanks
Vaibhav Jain
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20110725/edba29bb/attachment.html