find_or_create_page

Langue: en

Autres versions - même langue

Version: June 2009 (debian - 07/07/09)

Section: 9 (Appels noyau Linux)

Sommaire

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.