pandari kashyap wrote:
Hello fellow Kernel newbies,
One of the popular text books says that the processes runnning on Linux
on 32 bit architectures has the impression that it has 4GB of memory for
itself. My question is:
a) if every process has 4GB of Linear address space for itself, then how
does Linux differentiate between processes?. In the sense how does linux
differentiate between accesses to same addresses (ex address 500) in
different processes.
At context switch time, it changes the CPU to look at
a different set of page tables.
The 4GB of linear address space is divided, the bottom
3GB are different in every process, the top 1GB is for
kernel stuff, and is the same in every process.
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