Hi, On 02/21, Tejun Heo wrote: > > So, I really wanna avoid allowing userspace to cause D state sleeps. ... > ptrace support is a lot less important than kill for sure but if at > all possible I think it'd be better to have it Tejun, I agree it would be better. I did not argue with that. The question is how this can be implemented. And how much uglifications^W complications in the core kernel code this needs. > To summarize, the ideal result is the frozen state to be "stuck in > jobctl stop loop" Not sure I understand, but I don't think this can work... Let me repeat, imo the freezer should be "reliable", it shouldn't stuck in CGRP_FREEZE state forever if, say, it races with vfork(). And personally I think this is more important than (very limited) ptrace support. So I think it too should somehow interact with freezable_schedule/etc. Oleg.
