weird Ctrl-T debug messages
Michael Gmelin
freebsd at grem.de
Sat Jun 27 14:50:23 UTC 2020
On Sat, 27 Jun 2020 06:21:17 -0700
John Baldwin <jhb at FreeBSD.org> wrote:
> On 6/27/20 2:59 AM, Michael Gmelin wrote:
> >
> >
> > On Sat, 27 Jun 2020 12:06:17 +0300
> > Andriy Gapon <avg at FreeBSD.org> wrote:
> >
> >> On 27/06/2020 10:44, Li-Wen Hsu wrote:
> >>> On Sat, Jun 27, 2020 at 3:04 PM Hartmann, O.
> >>> <ohartmann at walstatt.org> wrote:
> >>>>
> >>>> Running poudriere on recent CURRENT with (recent) 12-STABLE and
> >>>> CURRENT jails reveals a weird behaviour recently when hitting
> >>>> Ctrl-T:
> >>> ...
> >>>> Is this debug fallout from /bin/sh?
> >>>
> >>> It's because kern.tty_info_kstacks is on by default now:
> >>>
> >>> https://svnweb.freebsd.org/changeset/base/362141
> >>
> >> May I suggest that the stack trace is printed procstat -kk style
> >> (single line) ? I think that the more compact output would be more
> >> convenient.
> >
> > It's a cool feature and having it on by default on CURRENT certainly
> > helps to discover it, which is great. Thanks for implementing this!
> >
> > I wouldn't enable it by default on RELEASE versions though, as
> > CTRL-T is a user interface to get status information (at least this
> > is how I use it personally, e.g., while running commands like
> > dd[0], cp, mv, poudriere etc.), not for getting debug output.
>
> I agree with this.
>
> > Question: Speaking of discovering the feature, wouldn't it make
> > sense to document this tunable on the stack(9) and/or tty(4) man
> > page(s)?
>
> This sounds like a great idea. Would you able to come up with a
> patch? I'd be happy to review it.
Sure, it actually seems like that termios(4) is the best
place to put this information.
https://reviews.freebsd.org/D25488
Best,
Michael
--
Michael Gmelin
More information about the freebsd-current
mailing list