On 2019-05-16, Oleg Nesterov <oleg@xxxxxxxxxx> wrote: > On 05/16, Christian Brauner wrote: > > > > With the introduction of pidfds through CLONE_PIDFD it is possible to > > created pidfds at process creation time. > > Now I am wondering why do we need CLONE_PIDFD, you can just do > > pid = fork(); > pidfd_open(pid); While the race window would be exceptionally short, there is the possibility that the child will die and their pid will be recycled before you do pidfd_open(). CLONE_PIDFD removes the race completely. -- Aleksa Sarai Senior Software Engineer (Containers) SUSE Linux GmbH <https://www.cyphar.com/>
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