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 Why is swap_free() called inside delete_from_swap_cache() in linux 
2.4.19? I believe delete_from_swap_cache() is called when we write a page 
to the swap disk. swap_free() decreases the count of number of references 
to that page. I am not understanding why should we decrement the count of 
references when we are swapping the page to the disk.

 Thanks,
 Raghu

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