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Date: Mon, 12 May 2003 23:53:12 -0700 (PDT)
From: Doug Barton <DougB@FreeBSD.org>
To: Don Lewis <truckman@FreeBSD.org>
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Subject: Re: mtv leaves a zombie after exit
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On Mon, 12 May 2003, Don Lewis wrote:

> On 12 May, Doug Barton wrote:
> > On Mon, 12 May 2003, Terry Lambert wrote:
> >
> >> A "ps -gaxl" will print the wait channel, which may be more
> >> informative.
> >
> >  UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT  TT    TIME COMMAND
> > 1000   0    1   0 -84  0   0   0 -      ZW    p4 0:00.00  (mtvp)
> >
> > BTW, inre your question about the shell, it's bash. But, I get the exact
> > same results if mtv is started as a child of the shell, as a child of
> > windowmaker, or as a child of netscape.
>
> Does this application use Linux threads?

Yes. I've never needed the linux threads port to run mtv, but just for
grins I installed it and I get the same results.

> The following code in wait1() makes me think that if a thread somehow
> gets orphaned by the parent Linux process, it will never get reaped.
> The exit code for Linux should probably wait for any child threads to
> exit.

Cool!  Fixing that is beyond me, but if someone sends me a patch, I'll be
glad to test it. Thanks for your analysis.

Doug

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