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Date:      Sat, 10 Dec 2011 14:02:54 -0800
From:      Kevin Oberman <kob6558@gmail.com>
To:        gljennjohn@googlemail.com
Cc:        freebsd-ports@freebsd.org
Subject:   Re: dvdrip hang when PERL_VERSION=5.12.4
Message-ID:  <CAN6yY1t8LuM5BPS7T1kczZ9Kf7v6d5WA3B9_6TwQzpfDXrdJJg@mail.gmail.com>
In-Reply-To: <20111210193313.225a20f0@ernst.jennejohn.org>
References:  <20111210193313.225a20f0@ernst.jennejohn.org>

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On Sat, Dec 10, 2011 at 10:33 AM, Gary Jennejohn
<gljennjohn@googlemail.com> wrote:
>
> I just noticed that dvdrip does not work when PERL_VERSION=3D5.12.4.
>
> Ths symptom is a hang as soon as the user tries to create a new project.
> Here's the ps output:
> 150 5360 4704 =A0 =A0 1 =A040 =A00 236740 =A047116 umtxn =A0 =A0I =A0 =A0=
 2 =A0 =A00:00.88
> /usr/local/bin/perl /usr/local/bin/dvdrip
>
> Note the umtxn.
>
> Forcing PERL_VERSION=3D5.8.9 and reinstalling dvdrip results in a working
> copy and creating a new project returns basically immediately and everyth=
ing
> else also works.
>
> Just thought I'd report it for the archive.

Ouch! umtxn is waiting on a kernel lock. This should NOT happen and it
looks more like a kernel issue than a userland one.

If you can still run dvdrip with 5.12.4, what does 'procstat -k PID"
show? It should provide some useful kernel stack information. Also,
what version of FreeBSD and is it on i386, and64, or some other?
--=20
R. Kevin Oberman, Network Engineer
E-mail: kob6558@gmail.com



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