Re: [PATCH] wait_task_zombie: don't fight with non-existing race with a dying ptracee

> (textually depends on wait_task_zombie-remove-unneeded-child-signal-check.patch)
> 
> The "p->exit_signal == -1 && p->ptrace == 0" check and the comment are bogus.
> We already did exactly the same check in eligible_child(), we did not drop
> tasklist_lock since then, and both variables need write_lock(tasklist) to be
> changed.

I think this is correct.  IIRC, when the check was added, ->ptrace could be
cleared some other way.


Thanks,
Roland
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References:
- [PATCH] wait_task_zombie: don't fight with non-existing race with a dying ptracee
  - From: Oleg Nesterov <[email protected]>

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