centos man page for grab_cache_page_nowait

GRAB_CACHE_PAGE_NOWA(9) 				    Memory Management in Linux					   GRAB_CACHE_PAGE_NOWA(9)

NAME
       grab_cache_page_nowait - returns locked page at given index in given cache

SYNOPSIS
       struct page * grab_cache_page_nowait(struct address_space * mapping, pgoff_t index);

ARGUMENTS
       mapping
	   target address_space

       index
	   the page index

DESCRIPTION
       Same as grab_cache_page, but do not wait if the page is unavailable. This is intended for speculative data generators, where the data can
       be regenerated if the page couldn't be grabbed. This routine should be safe to call while holding the lock for another page.

       Clear __GFP_FS when allocating the page to avoid recursion into the fs and deadlock against the caller's locked page.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   GRAB_CACHE_PAGE_NOWA(9)