Subject: Re: port-xen/30977: FPU troubles
To: None <port-xen-maintainer@netbsd.org, gnats-admin@netbsd.org,>
From: Quentin Garnier <cube@cubidou.net>
List: netbsd-bugs
Date: 12/09/2005 17:50:03
The following reply was made to PR port-xen/30977; it has been noted by GNATS.
From: Quentin Garnier <cube@cubidou.net>
To: Manuel Bouyer <bouyer@antioche.eu.org>
Cc: Paul Ripke <stix@stix.id.au>, gnats-bugs@NetBSD.org,
port-xen@NetBSD.org
Subject: Re: port-xen/30977: FPU troubles
Date: Fri, 9 Dec 2005 18:45:50 +0100
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On Wed, Nov 23, 2005 at 01:47:04PM +0100, Manuel Bouyer wrote:
> On Wed, Nov 23, 2005 at 08:15:04AM +1100, Paul Ripke wrote:
> > I've finally got around to trying xen (NetBSD-3.0BETA, xen 2.0.7) and
> > have run into this PR in DOM0.
> >=20
> > First sign was xearth coredumping on login. Next was only "clicking"
> > from xmms, and I've had xpdf core, too.
> >=20
> > A little debugging shows that the FPU state is not being correctly
> > saved or restored during "some" context switches. The following code
> > appears to exhibit the behaviour reliably:
[...]
> Index: i386/machdep.c
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
ogg123 is happier with this, but still not perfect.
gkrellm, OTOH, is really not happy with it.
--=20
Quentin Garnier - cube@cubidou.net - cube@NetBSD.org
"When I find the controls, I'll go where I like, I'll know where I want
to be, but maybe for now I'll stay right here on a silent sea."
KT Tunstall, Silent Sea, Eye to the Telescope, 2004.
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