Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
probe::vm.kmem_cache_free - Fires when kmem_cache_free is requested
SYNOPSIS
vm.kmem_cache_free
VALUES
name
Name of the probe point
call_site
Address of the function calling this kmemory function
ptr
Pointer to the kmemory allocated which is returned by kmem_cache
caller_function
Name of the caller function.
SystemTap Tapset Reference March 2016 PROBE::VM.KMEM_CAC(3stap)