Robuta

https://manpages.ubuntu.com/manpages/questing/man2/tgkill.2.html Ubuntu Manpage: tkill, tgkill - send a signal to a thread send a signal to a thread send a ubuntu manpage signal thread https://lkml.indiana.edu/hypermail/linux/kernel/0812.3/00027.html Linux-Kernel Archive: [RFC][PATCH 7/7][v4] SI_TKILL: Masquerade si_pid when crossing pidns boundary