Re: [PATCH] notify_parent and ptrace cleanup

[Linus Torvalds]

On Thu, 26 Aug 2004, OGAWA Hirofumi wrote:
> 
> Sorry for about it. Yes, racy is implementation issue. And AFAIK, it
> seems to be fixed by we don't allow SIGCONT. (If it doesn't break userland)

We should split TASK_STOPPED into two different cases: TASK_STOPPED and 
TASK_PTRACED.

A true TASK_STOPPED continues on SIGCONT. A TASK_PTRACED only continues 
when the ptracer says so.

That should be trivially invisible to the user (the only part a user would 
see would be if we make "ps" show a different letter for the PTRACED 
state..)

		Linus
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