suse man page for find_or_create_page

FIND_OR_CREATE_PAGE(9)					    Memory Management in Linux					    FIND_OR_CREATE_PAGE(9)

NAME
       find_or_create_page - locate or add a pagecache page

SYNOPSIS
       struct page * find_or_create_page(struct address_space * mapping, pgoff_t index, gfp_t gfp_mask);

ARGUMENTS
       mapping
	   the page's address_space

       index
	   the page's index into the mapping

       gfp_mask
	   page allocation mode

DESCRIPTION
       Locates a page in the pagecache. If the page is not present, a new page is allocated using gfp_mask and is added to the pagecache and to
       the VM's LRU list. The returned page is locked and has its reference count incremented.

       find_or_create_page may sleep, even if gfp_flags specifies an atomic allocation!

       find_or_create_page returns the desired page's address, or zero on memory exhaustion.

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