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[feature request] *: introduce pidfd-socket flag #4045

Merged
merged 1 commit into from
Nov 22, 2023
Merged

[feature request] *: introduce pidfd-socket flag #4045

merged 1 commit into from
Nov 22, 2023

Commits on Nov 21, 2023

  1. *: introduce pidfd-socket flag 

    The container manager like containerd-shim can't use cgroup.kill feature or
freeze all the processes in cgroup to terminate the exec init process.
It's unsafe to call kill(2) since the pid can be recycled. It's good to
provide the pidfd of init process through the pidfd-socket. It's similar to
the console-socket. With the pidfd, the container manager like containerd-shim
can send the signal to target process safely.

And for the standard init process, we can have polling support to get
exit event instead of blocking on wait4.

Signed-off-by: Wei Fu <[email protected]>
    @fuweid
    fuweid committed Nov 21, 2023
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