To: linux-kernel@vger.kernel.org
From: torvalds@transmeta.com (Linus Torvalds)
Subject: Re: Stress testing 2.4.14-pre6
Date: Thu, 1 Nov 2001 16:24:09 +0000 (UTC)
Organization: Transmeta Corporation
Message-ID: <9rrsv9$b9l$1@penguin.transmeta.com>
In-Reply-To: <3BE073B6.BDCB3D56@redhat.com>
NNTP-Posting-Date: 1 Nov 2001 16:26:28 GMT
Cache-Post-Path: palladium.transmeta.com!unknown@penguin.transmeta.com
Sender: linux-kernel-owner@vger.kernel.org

In article <3BE073B6.BDCB3D56@redhat.com>,
Bob Matthews  <bmatthews@redhat.com> wrote:
>Hi Linus,
>
>We've been doing some stress-testing on 2.4.14-pre6 and have encountered
>a couple of problems.  The platform is an 8xPIII with 8G RAM and 32G
>swap.  After running Cerberus for about 3 hours, the machine hung
>completely.  I was not able to switch VC's.

There is some race somewhere - I've found one interrupt race (that
actually seems to exist in the 2.2.x VM too, but is probably _much_
harder to trigger where an interrupt at _just_ the right time will
corrupt the per-process local page list.  That looks so unlikely that I
doubt that is it, but I'm looking for others (the irq one wasn't even a
SMP race - it's on UP too, surprise surprise). 

Working on it, in other words.

		Linus
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