> You're right, we just need to clear p->ptrace.  And there was a problem
> with debugged detached tasks.  Ingo, does this look right to you?  It
> passes my testing.  Handle unlinking in release_task instead of at both
> call sites, since they both need it.
your patch works for me - in fact it works better than the one i sent. I
had another (largely unrelated) patch which i suspected to cause hung
unkillable zombies while stracing an application - it turned out that your
patch fixes this artifact as well.
(Linus, please apply Daniel's patch, not mine.)
	Ingo
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