Messages in this thread | | | Date | Sat, 12 May 2007 18:25:58 +0400 | From | Oleg Nesterov <> | Subject | Re: [PATCH 1/7] Freezer: Read PF_BORROWED_MM in a nonracy way |
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On 05/12, Rafael J. Wysocki wrote: > > Hmm, I'm not sure if the task can call try_to_freeze() after doing exit(). > May it happen?
It can, note the do_exit()->ptrace_notify(). But this doesn't matter, I think. From the freezer POV an exiting task has 2 "interesting" events
exit_mm() ->mm becomes NULL
exit_notify() ->exit_state != 0, and perhaps the task disappears from global process list
> Or, perhaps, it's better to clear TIF_FREEZE (unconditionally) in exit_mm(), > after we've done tsk->mm = NULL? Oleg, what do you think?
Please see another message.
Oleg.
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