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 4.8.                 January 2017                                  KSIZE(9)