From 038a07a5420a59f1291dcf2a506f66335ec1cf9c Mon Sep 17 00:00:00 2001 From: Mike Rapoport Date: Thu, 23 Aug 2018 17:01:19 -0700 Subject: docs/core-api: mm-api: add section about GFP flags Link: http://lkml.kernel.org/r/1532626360-16650-8-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport Reviewed-by: Andrew Morton Cc: Jonathan Corbet Cc: Matthew Wilcox Cc: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/core-api/mm-api.rst | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'Documentation') diff --git a/Documentation/core-api/mm-api.rst b/Documentation/core-api/mm-api.rst index b5913aad3ae6..46ae3537fb12 100644 --- a/Documentation/core-api/mm-api.rst +++ b/Documentation/core-api/mm-api.rst @@ -14,6 +14,27 @@ User Space Memory Access .. kernel-doc:: mm/util.c :functions: get_user_pages_fast +Memory Allocation Controls +========================== + +Functions which need to allocate memory often use GFP flags to express +how that memory should be allocated. The GFP acronym stands for "get +free pages", the underlying memory allocation function. Not every GFP +flag is allowed to every function which may allocate memory. Most +users will want to use a plain ``GFP_KERNEL``. + +.. kernel-doc:: include/linux/gfp.h + :doc: Page mobility and placement hints + +.. kernel-doc:: include/linux/gfp.h + :doc: Watermark modifiers + +.. kernel-doc:: include/linux/gfp.h + :doc: Reclaim modifiers + +.. kernel-doc:: include/linux/gfp.h + :doc: Common combinations + The Slab Cache ============== -- cgit v1.2.3