Date: Thu, 28 Oct 2004 16:20:16 +0200
From: Ingo Molnar <mingo@elte.hu>
To: "K.R. Foley" <kr@cybsft.com>
Cc: linux-kernel@vger.kernel.org, Lee Revell <rlrevell@joe-job.com>,
       Rui Nuno Capela <rncbc@rncbc.org>, Mark_H_Johnson@Raytheon.com,
       Bill Huey <bhuey@lnxw.com>, Adam Heath <doogie@debian.org>,
       Florian Schmidt <mista.tapas@gmx.net>,
       Thomas Gleixner <tglx@linutronix.de>,
       Michal Schmidt <xschmi00@stud.feec.vutbr.cz>,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
       Karsten Wiese <annabellesgarden@yahoo.de>
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4
Message-ID: <20041028142016.GA27593@elte.hu>
References: <20041019180059.GA23113@elte.hu> <20041020094508.GA29080@elte.hu> <20041021132717.GA29153@elte.hu> <20041022133551.GA6954@elte.hu> <20041022155048.GA16240@elte.hu> <20041022175633.GA1864@elte.hu> <20041025104023.GA1960@elte.hu> <20041027001542.GA29295@elte.hu> <20041027130359.GA6203@elte.hu> <4180FEBB.5020802@cybsft.com>
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* K.R. Foley <kr@cybsft.com> wrote:

> I have been having problems on my UP system at home with all of the
> more recent patches (since U10.X). Some would boot and then the
> networking was severely busted (slowdowns, hangs, etc.), some would
> not even boot.  V0.4.3 was of the no boot variety. Just for grins I
> disabled kudzu, and the thing boots fine with no networking or other
> problems. This very well may have been a fluke, but I have
> successfully booted this kernel twice now. It did hang on a reboot at
> the point when it should have been doing the actual reboot and I had
> to press the button. I didn't have time this morning to turn kudzu
> back on to see if was just a fluke that it didn't boot the first time.
> Not sure what, if anything, this means, but V0.4.3 is running very
> nicely on my UP system with no lag or noticeable problems.

just to make sure - could try to run kudzu manually after bootup and
observe what happens? Do you have a udev based system? I recently
corrupted my udev database via a crash and had to remove the
/dev/.udev.tdb file and had to regenerate it via 'udevstart'. (be
careful doing that though, it might mess up your system.) The symtoms
were a hung kudzu - while in reality it 'hung' because udev and udevinfo
processes looped in userspace forever. Weirdly, the stock Fedora kernel
didnt hang in this same phase, so there might still be a
PREEMPT_REALTIME bug here.

	Ingo
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