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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

March 2016 Kernel Hackers Manual 3.2.