KFREE(9) Memory Management in Linux KFREE(9)NAME
kfree - free previously allocated memory
SYNOPSIS
void kfree(const void * objp);
ARGUMENTS
objp
pointer returned by kmalloc.
DESCRIPTION
If objp is NULL, no operation is performed.
Don't free memory not originally allocated by kmalloc or you will run into trouble.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 KFREE(9)
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KMEM_CACHE_CREATE(9) Memory Management in Linux KMEM_CACHE_CREATE(9)NAME
kmem_cache_create - Create a cache.
SYNOPSIS
struct kmem_cache * kmem_cache_create(const char * name, size_t size, size_t align, unsigned long flags, void (*ctor) (void *));
ARGUMENTS
name
A string which is used in /proc/slabinfo to identify this cache.
size
The size of objects to be created in this cache.
align
The required alignment for the objects.
flags
SLAB flags
ctor
A constructor for the objects.
DESCRIPTION
Returns a ptr to the cache on success, NULL on failure. Cannot be called within a int, but can be interrupted. The ctor is run when new
pages are allocated by the cache.
name must be valid until the cache is destroyed. This implies that the module calling this has to destroy the cache before getting
unloaded. Note that kmem_cache_name is not guaranteed to return the same pointer, therefore applications must manage it themselves.
The flags are
SLAB_POISON - Poison the slab with a known test pattern (a5a5a5a5) to catch references to uninitialised memory.
SLAB_RED_ZONE - Insert `Red' zones around the allocated memory to check for buffer overruns.
SLAB_HWCACHE_ALIGN - Align the objects in this cache to a hardware cacheline. This can be beneficial if you're counting cycles as closely
as davem.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 KMEM_CACHE_CREATE(9)