MEMPOOL_CREATE(9) Memory Management in Linux MEMPOOL_CREATE(9)NAME
mempool_create - create a memory pool
mempool_t * mempool_create(int min_nr, mempool_alloc_t * alloc_fn, mempool_free_t * free_fn, void * pool_data);
the minimum number of elements guaranteed to be allocated for this pool.
user-defined element-allocation function.
user-defined element-freeing function.
optional private data available to the user-defined functions.
this function creates and allocates a guaranteed size, preallocated memory pool. The pool can be used from the mempool_alloc and
mempool_free functions. This function might sleep. Both the alloc_fn and the free_fn functions might sleep - as long as the mempool_alloc
function is not called from IRQ contexts.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 MEMPOOL_CREATE(9)
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KMALLOC_ARRAY(9) Memory Management in Linux KMALLOC_ARRAY(9)NAME
kmalloc_array - allocate memory for an array.
void * kmalloc_array(size_t n, size_t size, gfp_t flags);
number of elements.
the type of memory to allocate.
The 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.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 KMALLOC_ARRAY(9)
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