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 3.10 June 2014 KSIZE(9)
