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Re: [Xen-devel] Xen 3.4.2 dump registers triggers watchdog

To: Andrew Lyon <andrew.lyon@xxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Xen 3.4.2 dump registers triggers watchdog
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Fri, 11 Dec 2009 15:33:46 +0000
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On 11/12/2009 15:14, "Andrew Lyon" <andrew.lyon@xxxxxxxxx> wrote:

> I have two systems running Xen 3.4.2 both with opensuse/novell forward
> ported dom0 kernel, one 2.6.29 the other 2.6.32, on both of them
> dumping Xen registers using 'd' with the xen watchdog enabled triggers
> the watchdog and reboot, is this normal?

Either the serial line is very slow, or timings are off in the watchdog code
so it triggers too early (should need to see no softirq activity for 5
seconds before watchdog fires).

We could put a watchdog_disable()/enable() around the 'd' key handler, if
it's just simply that the serial output is taking too long.

 -- Keir

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