find_or_create_page man page on Oracle

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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 3.8.	   June 2014		FIND_OR_CREATE_PAGE(9)
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