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Date:      Sun, 23 Mar 2014 20:19:44 -0400
From:      Glen Barber <gjb@FreeBSD.org>
To:        John Baldwin <jhb@freebsd.org>
Cc:        svn-src-head@freebsd.org, Aleksandr Rybalko <ray@freebsd.org>, src-committers@freebsd.org, svn-src-all@freebsd.org
Subject:   Re: svn commit: r263321 - head/sys/dev/vt
Message-ID:  <20140324001944.GT3452@glenbarber.us>
In-Reply-To: <201403191453.47690.jhb@freebsd.org>
References:  <201403182222.s2IMMmOM081929@svn.freebsd.org> <201403191453.47690.jhb@freebsd.org>

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On Wed, Mar 19, 2014 at 02:53:47PM -0400, John Baldwin wrote:
> On Tuesday, March 18, 2014 6:22:48 pm Aleksandr Rybalko wrote:
> > Author: ray
> > Date: Tue Mar 18 22:22:47 2014
> > New Revision: 263321
> > URL: http://svnweb.freebsd.org/changeset/base/263321
> >=20
> > Log:
> >   Switch kern.vt.suspendswitch to 0 by default (disabled).
> >   kern.vt.suspendswitch - sysctl/tunable which enable switch to VT0 bef=
ore going
> >   to suspend and switch back after resume.
> >  =20
> >   MFC after:	7 days
>=20
> I think it is fine to change the default, but I'm not certain that this f=
ixes
> the panics on resume.  So far no one has reported back that this did fix =
them
> after I suggested it.  It would be good to fix the panics as well if poss=
ible.
> The last time I looked at it in detail, it seemed like the callout for on=
ly
> ttyv0 had been zero'd.  Other ttyv timers used in switching still had the=
 correct
> contents.
>=20

I can confirm setting kern.vt.suspendswitch=3D0 fixes the panic for me.

Glen


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