how to get PFN of page cache?

[Valdis.Kletnieks at vt.edu]

On Thu, 20 Mar 2014 17:14:57 +0530, pravin jadav said:

> i want to develop linux kernel module that will get PFN of pagecache pages.
> please help me how to develop this kind of kernel module.

What do you intend to do with the page once you find its PFN?  It's quite
possible there's already an API to do what you want without even needing
its PFN - or good technical reasons to not do what your module intends to
do once it has the PFN....
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