PAGECACHE_GET_PAGE(9)               Memory Management in Linux              PAGECACHE_GET_PAGE(9)



NAME
       pagecache_get_page - find and get a page reference

SYNOPSIS
       struct page * pagecache_get_page(struct address_space * mapping, pgoff_t offset,
                                        int fgp_flags, gfp_t gfp_mask);

ARGUMENTS
       mapping
           the address_space to search

       offset
           the page index

       fgp_flags
           PCG flags

       gfp_mask
           gfp mask to use for the page cache data page allocation

DESCRIPTION
       Looks up the page cache slot at mapping & offset.

       PCG flags modify how the page is returned.

       FGP_ACCESSED: the page will be marked accessed FGP_LOCK: Page is return locked FGP_CREAT:
       If page is not present then a new page is allocated using gfp_mask and added to the page
       cache and the VM's LRU list. The page is returned locked and with an increased refcount.
       Otherwise, NULL is returned.

       If FGP_LOCK or FGP_CREAT are specified then the function may sleep even if the GFP flags
       specified for FGP_CREAT are atomic.

       If there is a page cache page, it is returned with an increased refcount.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                     PAGECACHE_GET_PAGE(9)