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)
