THANKS for your reply again!!!
Some of the segments used by Linux are, defined in GDT: kernel code
segment, kernel data segment, user code segment, and user data segment.
All these segment have the 'base=0x00000000' and 'Limit=0xfffff', which
means they all share the same full range of memory. This means they all
share the same linear address space. What I can't understand is that
why don't the kernel just use linear addresses, without worrying
logical address. Beause to me, the logical address makes no use in this
case.
Regards!
Fei
