how to get PFN of page cache?

[김찬]

Oh, I see.
By PFN of page cache, do you mean the one in the memory management unit? Or is there another page cache for the disk cache(I’m not sure if there’s one)?
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From: pravin jadav [mailto:pravin.jadav17 at gmail.com] 
Sent: Friday, March 21, 2014 1:08 PM
To: 김찬; Valdis Kletnieks
Cc: Pranay Srivastava; Kernelnewbies at kernelnewbies.org
Subject: Re: how to get PFN of page cache?

basically i need to develop kernel module that get PFN of page cache and is corresponding disk block number.

after getting PFN and Disk block number, user space program transfer PFN and Disk blick number to the source VMM and remote VMM. 

i use that module in virtual machine(VM) live migration.