On 07/10, Pavel Begunkov wrote: > > On 7/10/24 01:54, Tejun Heo wrote: > >Yeah, the question is: If CRIU is to use cgroup freezer to freeze the tasks > >and then go around tracing each to make dump, would the freezer be enough in > >avoiding interim state changes? Using CRIU implementation is a bit arbitrary > >but I think checkpoint-restart is a useful bar to measure what should stay > >stable while a cgroup is frozen. > > Sounds like in the long run we might want to ignore task_work while > it's frozen, Just in case, this is what I have in mind right now, but I am still not sure and can't make a "clean" patch. If nothing else. CRIU needs to attach and make this task TASK_TRACED, right? And once the target task is traced, it won't react to task_work_add(TWA_SIGNAL). Oleg.
