On 8 August 2016 at 14:11, Tom Horsley <horsley1...@gmail.com> wrote: > Every once in a while google-chrome goes into a 100% cpu loop. > I got curious and examined the thread that was running at 100% > and strace says this over and over again till I interrupt it: > > gettid() = 1 > gettid() = 1 > gettid() = 1 > gettid() = 1 > ^Cstrace: Process 18863 detached > <detached ...> > > Clearly Process 18863 isn't the init process, how can it > have a tid of 1?
If you call clone() with CLONE_NEWPID then the new process will run in a new PID namespace (with new pids/tids starting at 1). The new process still has a pid in the old (containing) namespace, here presumably 18863. Chrome is probably using namespaces to isolate itself from the rest of the system. You can read more about CLONE_NEWPID in 'man 2 clone'. Vegard
