"to_ftrace(id)"
"       <unknown>-10    (   10) [000] .... 0.000000: kfree: call_site=16 ptr=32"
"       <unknown>-10    (   10) [000] .... 0.000000: kfree: call_site=18446744073709551600 ptr=18446744073709551584"
"       <unknown>-10    (   10) [000] .... 0.000000: kmalloc: bytes_alloc=32 bytes_req=16 call_site=18446744073709551600 gfp_flags=GFP_NOWAIT ptr=18446744073709551584"