sahlot arvind wrote:
Hi All,
I just started learning Linux Virtual Memory Management Subsystem.
I see the memory is divided into three zones. Comments in file mm/mmzone.h
/*
* ZONE_DMA < 16 MB ISA DMA capable memory
* ZONE_NORMAL 16-896 MB direct mapped by the kernel
* ZONE_HIGHMEM > 896 MB only page cache and user processes
*/
Here second comment (ZONE_NORMAL) says that it is directly mapped by
kernel.
Could anybody please tell me what does direct mean here?
Does this mean Physical address = Virtual Address???
It means physical address = virtual address - "a fixed offset" (which is
0xc0000000)
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