mykey "Some payload" Key ID is 64a4dca $ grep '64a4dca' /proc/keys 064a4dca I--Q--- 1 perminstantiated: $ ./t_request_key user mtk:key1 "Payload data" $ grep '2dddaf50' /proc/keys 2dddaf50 I--Q--- 1 permlike with the following command: cat /proc/cpuinfo | grep ' mpx ' A thread may not switch