On 03/06, Peter Zijlstra wrote: > > and this is a failed fork(). > > > However, inherited events don't have a filedesc to fput(), and > similarly, a task that fails for has never been visible to attach a perf > event to because it never hits the pid-hash.
Yes, it is not visible to find_task_by_vpid() until copy_process() does attach_pid(PIDTYPE_PID), and copy_process() can't fail after that. Oleg.
