grab_cache_page_nowait man page on Scientific

grab_cache_page_nowait man page on Scientific

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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 2.6.	 November 2013	       GRAB_CACHE_PAGE_NOWA(9)

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