I was reading about paging and swap-space and I'm a little confused about how much space (and where) on the hard-disk is used to page out / swap-out frames. Let's think of the following scenario :
We have a single process which progressively uses newer pages in virtual memory. Each time for a new page, we allocate a frame in physical memory.
But after a while, frames in the physical memory get exhausted and we choose a victim frame to be removed from RAM.
I have the following doubts :
Does the victim frame get swapped out to the swap space or paged out to some different location (apart from swap-space) on the hard-disk?
From what I've seen, swap space is usually around 1-2x size of RAM, so does this mean a process can use only RAM + swap-space amount of memory in total? Or would it be more than that and limited by the size of virtual memory?
I'm a bit confused about PAM and PolKit. As I understand it now, PAM is a suite of libraries for authenticating users while PolKit is a layer of security on top of the DBus. Is that right?
Could someone offer me a high level overview of the differences between them?
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