Date: Tue, 7 Oct 2008 10:02:56 -0400 From: John Baldwin <jhb@freebsd.org> To: Jeremy Chadwick <koitsu@freebsd.org> Cc: freebsd-stable@freebsd.org, jeff@freebsd.org, Gerrit =?iso-8859-1?q?K=FChn?= <gerrit@pmp.uni-hannover.de>, d@delphij.net Subject: Re: Regression 7.0R -> 7-stable? Message-ID: <200810071002.56788.jhb@freebsd.org> In-Reply-To: <20081007133710.GA50114@icarus.home.lan> References: <20080807132947.061d24eb.gerrit@pmp.uni-hannover.de> <20081007143724.a01502e4.gerrit@pmp.uni-hannover.de> <20081007133710.GA50114@icarus.home.lan>
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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 Kühn wrote: > > On Tue, 7 Oct 2008 13:38:01 +0200 Gerrit Kühn <gerrit@pmp.uni-hannover.de> > > wrote about Re: Regression 7.0R -> 7-stable?: > > > > [...] > > > > 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. > > > > 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... > > This is of great concern if in fact that's true. > > 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 with messages on the console, or are you still seeing hangs? When you get a hang, can you break into the debugger and get a crash dump? -- John Baldwin
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