On 11/14, Michal Hocko wrote: > > > I don't understand why it isn't appropriate for exec to block. The > > exec can freeze. When tasks are thawed, the killed sub-thread will die > > and wake de_thread(). The exec will continue to work from resume. > > Because this is fragile. I don't really agree, but... > I haven't checked the full set of resources the > task holds when in this path but I can imagine we can introduce lock > dependency on freezing really easily. And you are right, see another email I sent you a minute ago. But again, we need to change de_thread to sleep without cred_guard_mutex anyway, so I think this change is fine. At least in that it can't add the new problems. Oleg.
