On Sat, Mar 30, 2019 at 9:09 AM Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > On Fri, Mar 29, 2019 at 8:54 AM Christian Brauner <christian@xxxxxxxxxx> wrote: > > > > /* Introduction */ > > This adds the pidfd_open() syscall. > > pidfd_open() allows to retrieve file descriptors for a given pid. This > > includes both file descriptors for processes and file descriptors for > > threads. > > I'm ok with the pidfd_open() call to just get a pidfd, but that > "pidfd_to_profs()" needs to go away. > > If you want to open the /proc/<pid>/status file, then just do that. > This whole "do one and convert to the other" needs to die. No, no, no. How do you propose that someone open the /proc/<pid>/status file in a race-free manner starting with the result of calling pidfd_open?
