pagecache_get_page (9) - Linux Man Pages
pagecache_get_page: find and get a page reference
pagecache_get_page - find and get a page reference
struct page * pagecache_get_page(struct address_space
*mapping, pgoff_t offset, int fgp_flags, gfp_t gfp_mask);
- the address_space to search
- the page index
- PCG flags
- gfp mask to use for the page cache data page allocation
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.