suse man page for invalidate_mapping_pages

INVALIDATE_MAPPING_P(9) 				    Memory Management in Linux					   INVALIDATE_MAPPING_P(9)

NAME
       invalidate_mapping_pages - Invalidate all the unlocked pages of one inode

SYNOPSIS
       unsigned long invalidate_mapping_pages(struct address_space * mapping, pgoff_t start, pgoff_t end);

ARGUMENTS
       mapping
	   the address_space which holds the pages to invalidate

       start
	   the offset 'from' which to invalidate

       end
	   the offset 'to' which to invalidate (inclusive)

DESCRIPTION
       This function only removes the unlocked pages, if you want to remove all the pages of one inode, you must call truncate_inode_pages.

       invalidate_mapping_pages will not block on IO activity. It will not invalidate pages which are dirty, locked, under writeback or mapped
       into pagetables.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010						   INVALIDATE_MAPPING_P(9)