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From: Juli Mallett <jmallett@FreeBSD.org>
Date: Sun, 28 Apr 2013 16:29:29 -0700
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Subject: Re: TF_NEEDSYN flag never set.
To: Barry Spinney <spinney@tilera.com>
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On Sun, Apr 28, 2013 at 3:31 PM, Barry Spinney <spinney@tilera.com> wrote:
> (p.s. I doubt it matters which version of code, but to be precise this is from the
> /pub/FreeBSD/development/tarballs named "src_stable_6.tar.gz" dated "4/21/2013 01:15 AM",
> gotten from ftp1.us.freebsd.org<ftp://ftp1.us.freebsd.org>)

Barry, of course the version of code matters :)

You might try using FXR for these sorts of lookups in the future:
http://fxr.watson.org/fxr/ident?i=TF_NEEDSYN

Or just check out -CURRENT using Subversion.  Or are you actually
working on 6.x and so need an answer for 6.x?

Thanks,
Juli.