On Mon, May 11, 2020 at 03:59:17PM +0200, Andrzej Pietrasiewicz wrote: > Some userland might want to implement a policy to signal a configured > process with a configured signal. This patch adds necessary kernel-side > infrastructure and the newly added handler is triggered with > Alt-Shift-SysRq-s. Optionally the userland can also specify the expected > name of parent process of the victim. THat's crazy, what "userspace" wants to do something like this that can't just do it by running a program? Why force the kernel to do it for them? And you don't document any of this :( greg k-h