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how to disconnect connections between a vm page and physical page?
I use a embedded linux which don't use swap part.
my code use a lot of buf pools. after the buf in the pool is write(the first time, kernel will find a free physical page and connect it to the vm page), is there a method to disconnect connections between vm page and physical page? so the physical page can be used by others that really need it, other than occupied by the buf in pool.
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