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KSIZE(9) Memory Management in Linux KSIZE(9)
NAME
ksize - get the actual amount of memory allocated for a given object
SYNOPSIS
size_t ksize(const void * objp);
ARGUMENTS
objp
Pointer to the object
DESCRIPTION
kmalloc may internally round up allocations and return more memory than
requested. ksize can be used to determine the actual amount of memory
allocated. The caller may use this additional memory, even though a
smaller amount of memory was initially specified with the kmalloc call.
The caller must guarantee that objp points to a valid object previously
allocated with either kmalloc or kmem_cache_alloc. The object must not
be freed during the duration of the call.
COPYRIGHT
Kernel Hackers Manual 2.6. November 2013 KSIZE(9)
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