Sunday, March 9, 2014

How will the Kernel Space mapping look like when our RAM is less than 896 MB?

The kernel virtual space will map linearly to the entire physical address linerly if the RAM is upto 896 MB.
For ex. if we have only 512, there will be only 512 MB mapped.
i.e if our physical memory is in 0x00000000 to 0x20000000, it will be mapped for direct kernel access to virtual addresses 0xC0000000 to 0xE0000000 (linear mapping).

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