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author | Jonathan Corbet <corbet@lwn.net> | 2018-11-20 09:22:24 -0700 |
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committer | Jonathan Corbet <corbet@lwn.net> | 2018-11-20 09:22:24 -0700 |
commit | 3870a2371263d4f8e6cec4a8b3860c1f6ee601ad (patch) | |
tree | 8a9bbcc4d39de7a9ba66674c0c14d8036f58d254 /include/linux/slab.h | |
parent | acf0f57a2cb89be0d99fb834079f91b1c67aa133 (diff) | |
parent | 01598ba6b1a863fbd819fc5c36c27886e5072164 (diff) | |
download | linux-3870a2371263d4f8e6cec4a8b3860c1f6ee601ad.tar.gz linux-3870a2371263d4f8e6cec4a8b3860c1f6ee601ad.tar.bz2 linux-3870a2371263d4f8e6cec4a8b3860c1f6ee601ad.zip |
Merge branch 'kmalloc' into docs-next
jc: fixed conflict with willy's memory-allocation tag patch.
Diffstat (limited to 'include/linux/slab.h')
-rw-r--r-- | include/linux/slab.h | 55 |
1 files changed, 27 insertions, 28 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h index 918f374e7156..11bb14a7c069 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -486,48 +486,47 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags) * kmalloc is the normal method of allocating memory * for objects smaller than page size in the kernel. * - * The @flags argument may be one of: + * The @flags argument may be one of the GFP flags defined at + * include/linux/gfp.h and described at + * :ref:`Documentation/core-api/mm-api.rst <mm-api-gfp-flags>` * - * %GFP_USER - Allocate memory on behalf of user. May sleep. + * The recommended usage of the @flags is described at + * :ref:`Documentation/core-api/memory-allocation.rst <memory-allocation>` * - * %GFP_KERNEL - Allocate normal kernel ram. May sleep. + * Below is a brief outline of the most useful GFP flags * - * %GFP_ATOMIC - Allocation will not sleep. May use emergency pools. - * For example, use this inside interrupt handlers. + * %GFP_KERNEL + * Allocate normal kernel ram. May sleep. * - * %GFP_HIGHUSER - Allocate pages from high memory. + * %GFP_NOWAIT + * Allocation will not sleep. * - * %GFP_NOIO - Do not do any I/O at all while trying to get memory. + * %GFP_ATOMIC + * Allocation will not sleep. May use emergency pools. * - * %GFP_NOFS - Do not make any fs calls while trying to get memory. - * - * %GFP_NOWAIT - Allocation will not sleep. - * - * %__GFP_THISNODE - Allocate node-local memory only. - * - * %GFP_DMA - Allocation suitable for DMA. - * Should only be used for kmalloc() caches. Otherwise, use a - * slab created with SLAB_DMA. + * %GFP_HIGHUSER + * Allocate memory from high memory on behalf of user. * * Also it is possible to set different flags by OR'ing * in one or more of the following additional @flags: * - * %__GFP_HIGH - This allocation has high priority and may use emergency pools. - * - * %__GFP_NOFAIL - Indicate that this allocation is in no way allowed to fail - * (think twice before using). + * %__GFP_HIGH + * This allocation has high priority and may use emergency pools. * - * %__GFP_NORETRY - If memory is not immediately available, - * then give up at once. + * %__GFP_NOFAIL + * Indicate that this allocation is in no way allowed to fail + * (think twice before using). * - * %__GFP_NOWARN - If allocation fails, don't issue any warnings. + * %__GFP_NORETRY + * If memory is not immediately available, + * then give up at once. * - * %__GFP_RETRY_MAYFAIL - Try really hard to succeed the allocation but fail - * eventually. + * %__GFP_NOWARN + * If allocation fails, don't issue any warnings. * - * There are other flags available as well, but these are not intended - * for general use, and so are not documented here. For a full list of - * potential flags, always refer to linux/gfp.h. + * %__GFP_RETRY_MAYFAIL + * Try really hard to succeed the allocation but fail + * eventually. */ static __always_inline void *kmalloc(size_t size, gfp_t flags) { |