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READ_CACHE_PAGE(9) Memory Management in Linux READ_CACHE_PAGE(9)

NAME

read_cache_page - read into page cache, fill it if needed

SYNOPSIS

struct page * read_cache_page(struct address_space * mapping, pgoff_t index, int (*filler) (void *, struct page *), void * data);

ARGUMENTS

mapping
the page's address_space

index

the page index

filler

function to perform the read

data

first arg to filler(data, page) function, often left as NULL

DESCRIPTION

Read into the page cache. If a page already exists, and PageUptodate is not set, try to fill the page and wait for it to become unlocked.

If the page does not get brought uptodate, return -EIO.

COPYRIGHT

April 2019 Kernel Hackers Manual 4.9.