Recall Memory Protection
Page Table 0
Main
Memory
Process 0
VPN PPN
0 1
1 3
2
3 INV
Page Table 1
Process 1
VPN PPN
0 4
1 DP0
2
3 INV
PP0
PP1
PP3
PP4
Free
This page is shared
between the processes!
x
y
x and y are termed
shared variables
PP2
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