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Re: [Xen-devel] refcount errors then crash on XenoLinux with the latest

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] refcount errors then crash on XenoLinux with the latest source
From: Kip Macy <kmacy@xxxxxxxxxxx>
Date: Tue, 24 Feb 2004 09:21:11 -0800 (PST)
Cc: Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx
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Or accidentally left-clicking on the console window with the mouse while
trying to copy the output. Interesting side affect, several mouse clicks
== reboot.

                -Kip

On Tue, 24 Feb 2004, Keir Fraser wrote:

> > > It happened again. Is it possible that Xen isn't disabling network
> > > interrupts while it is "auditing all pages"?
> >
> > Quite possibly. The auditing code was added fairly recently
> > specifically to assist debugging of a guest OS that was
> > internally 'leaking' references to pages.
> >
> > Its not in any of the non-debug builds, and is not well
> > tested. In the circumstance we were using it the problem with the
> > guestOS was rather subtle and just a couple of pages were failing
> > the audit and generating log messages. (The audit code gets
> > called when the guest does something 'weird', or when you invoke
> > the appropriate keyboard handler)
> >
> > If your machine has lots of physical memory, the auditing will
> > take some time, and I'm not surprised that its causing
> > problems. If its not helping you, just comment it out, or invoke
> > it via the keyboard handler when you want it.
>
> In fact the auditing code is only ever invoked in response to keyboard
> or serial input. Just avoid pressing the 'm' key. :-)
>
>  -- Keir
>
>
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