KMALLOC_ARRAY - Online Linux Manual PageSection : 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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