Re: 2.1.111 SMP fix in sys_wait4()

Linus Torvalds (torvalds@transmeta.com)
Mon, 27 Jul 1998 23:45:30 -0700 (PDT)

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On Tue, 28 Jul 1998, Eric PAIRE wrote:
>
> The p_[o]pptr links are modified without any lock held when a debugged ZOMBIE
> task status is got by the debugger task. I think that the links should be
> modified with tasklist_lock exclusively help since they can be modified in
> parallel by forget_original_parent(). I suggest the enclosed patch for 2.1.111
> to fix this potential (and extremely unfrequent :-) SMP problem.

Looks good, applied.

Linus

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