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authorMike Rapoport <rppt@linux.vnet.ibm.com>2018-08-23 17:01:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-23 18:48:43 -0700
commit038a07a5420a59f1291dcf2a506f66335ec1cf9c (patch)
tree007f3997e908f780f28501d3a8c2d3356b4394ba
parent263fade51f7bdd5ad7ebbfe82113a44c5ea4c36c (diff)
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 <rppt@linux.vnet.ibm.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/core-api/mm-api.rst21
1 files changed, 21 insertions, 0 deletions
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
==============