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From: John Baldwin <jhb@freebsd.org>
To: Jeremy Chadwick <koitsu@freebsd.org>
Date: Tue, 7 Oct 2008 10:02:56 -0400
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	Gerrit =?iso-8859-1?q?K=FChn?= <gerrit@pmp.uni-hannover.de>, d@delphij.net
Subject: Re: Regression 7.0R -> 7-stable?
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On Tuesday 07 October 2008 09:37:10 am Jeremy Chadwick wrote:
> On Tue, Oct 07, 2008 at 02:37:24PM +0200, Gerrit K=FChn wrote:
> > On Tue, 7 Oct 2008 13:38:01 +0200 Gerrit K=FChn <gerrit@pmp.uni-hannove=
r.de>
> > wrote about Re: Regression 7.0R -> 7-stable?:
> >=20
> > [...]
> >=20
> > GK> However, yesterday I upgraded the system to a recent 7-stable
> > GK> codebase, and now it locks again hard after probing the CPU cores. =
My
> > GK> setup remained exactly the same, the new code just does not work.
> > GK> Please let me know what I have do to provide further information.
> >=20
> > Well, comparing the kernel setups again I found one thing that makes a
> > difference: The scheduler (somewhen SCHED_ULE has been declared the
> > default).
> > SCHED_ULE is crashing the system, SCHED_4BSD works fine...
>=20
> This is of great concern if in fact that's true.
>=20
> I'm adding Jeff Roberson, author of the ULE/SMP2.0 code, to the CC.

Do you have more details about the crash?  Are you getting an actual panic=
=20
with messages on the console, or are you still seeing hangs?  When you get =
a=20
hang, can you break into the debugger and get a crash dump?

=2D-=20
John Baldwin