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    SubjectRe: [PATCH 06/16] freezer: make exiting tasks properly unfreezable

    Not a comment, but the question. Probably falls into the "read the
    whole series" category too.

    On 08/19, Tejun Heo wrote:
    > There's no point in freezing an exiting task.

    This is not clear to me. Probably this is fine, I do not know what
    the callers of freeze_processes() actually expect.

    > @@ -915,6 +913,12 @@ NORET_TYPE void do_exit(long code)
    > ptrace_event(PTRACE_EVENT_EXIT, code);
    > + /*
    > + * With ptrace notification done, there's no point in freezing from
    > + * here on. Disallow freezing.
    > + */
    > + current->flags |= PF_NOFREEZE;

    OK, but what PF_NOFREEZE actually means?

    Apart from "dont try to freeze" it means "no need to freeze", yes?

    IOW, try_to_freeze_tasks() can succeed even if we have a lot of
    exitinig task which can make some activity, say, disk i/o. Is this

    Once again, I do not understand the problem-space at all, jus I am



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