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

[Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>]

> 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.

Cheers,
Ian





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