KMALLOC_ARRAY - Online Linux Manual Page

Section : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Memory Management in Linux
NAMEkmalloc_array − allocate memory for an array​.
SYNOPSISvoid * kmalloc_array(size_t n, size_t size, gfp_t flags);
ARGUMENTSn number of elements​. size element size​. flags the type of memory to allocate​.
DESCRIPTIONThe flags argument may be one of: GFP_USER − Allocate memory on behalf of user​. May sleep​. GFP_KERNEL − Allocate normal kernel ram​. May sleep​. GFP_ATOMIC − Allocation will not sleep​. May use emergency pools​. For example, use this inside interrupt handlers​. GFP_HIGHUSER − Allocate pages from high memory​. GFP_NOIO − Do not do any I/O at all while trying to get memory​. 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​. Also it is possible to set different flags by OR´ing in one or more of the following additional flags: __GFP_COLD − Request cache−cold pages instead of trying to return cache−warm pages​. __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_NORETRY − If memory is not immediately available, then give up at once​. __GFP_NOWARN − If allocation fails, don´t issue any warnings​. __GFP_REPEAT − If allocation fails initially, try once more before failing​. 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​.
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