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Date: Tue, 5 Oct 2004 02:19:44 +0100 (WEST)
Subject: Re: [patch] voluntary-preempt-2.6.9-rc3-mm1-S9
From: "Rui Nuno Capela" <rncbc@rncbc.org>
To: "Ingo Molnar" <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org, "Lee Revell" <rlrevell@joe-job.com>,
       "K.R. Foley" <kr@cybsft.com>, "thewade" <pdman@aproximation.org>,
       "Florian Schmidt" <mista.tapas@gmx.net>
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Ingo wrote:
>
> i've released the -S9 VP patch:
> http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc3-mm2-S9
>

Me again, we bad humor :(

My SMP/HT box is (again) terribly in that uglyness of being quite
unfriendly to -mm1, -mm2, and indirectly to -S8 and -S9 labeled kernels.

It works quite well with vanilla 2.6.9-rc3, though.

But very, very bad with those -mm1 or -mm2 patches. To get it straight,
almost all the time it hangs, randomly, but not as completely as to a
dramatic cold-reboot. It stalls on the the most administrative tasks. Name
one, and it stalls! I can hardly feel lucky if it sometimes reaches the
login prompt, while boot/initing.

I know you remember this story. Yeah. This seems quite similar to some of
earlier problems, but (un/fortunately) it doesn't seem related to VP at
all. Just having -mm1 or -mm2 is enough to make this machine go astray.

However, as usual, this seems to be ix86 SMP/HT specific. On my laptop, I
get to run full 2.6.9-rc3-mm2-S9 UP very happily.

Sorry if I can't get any real or useful debug data for now. The bad
behavior I'm referring to, is terribly non-deterministic, so I couldn't
get a pattern yet.

I just wanted to let you know ;)

Sorry for the bandwidth waste,

Cheers,
-- 
rncbc aka Rui Nuno Capela
rncbc@rncbc.org

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