1FIND_OR_CREATE_PAGE(9)    Memory Management in Linux    FIND_OR_CREATE_PAGE(9)
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NAME

6       find_or_create_page - locate or add a pagecache page
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SYNOPSIS

9       struct page * find_or_create_page(struct address_space * mapping,
10                                         pgoff_t index, gfp_t gfp_mask);
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ARGUMENTS

13       mapping
14           the page's address_space
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16       index
17           the page's index into the mapping
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19       gfp_mask
20           page allocation mode
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DESCRIPTION

23       Looks up the page cache slot at mapping & offset. If there is a page
24       cache page, it is returned locked and with an increased refcount.
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26       If the page is not present, a new page is allocated using gfp_mask and
27       added to the page cache and the VM's LRU list. The page is returned
28       locked and with an increased refcount.
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30       On memory exhaustion, NULL is returned.
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32       find_or_create_page may sleep, even if gfp_flags specifies an atomic
33       allocation!
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36Kernel Hackers Manual 3.10         June 2019            FIND_OR_CREATE_PAGE(9)
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