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.