Re: [Xen-devel] Reproducible system crash

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 16 Mar 2005, at 18:00, Peter Joanes wrote:

> (XEN) DOM0: (file=memory.c, line=409) Bad L1 type settings 0100
> (XEN) DOM0: (file=memory.c, line=1759) ptwr: Could not re-validate l1 
> page
> (XEN)
Someone is attempting to set _PAGE_GLOBAL bit in one of the page-table 
entries.
XenLinux should never do this -- do you have any suspicious-looking 
modules installed in your kernel that may need fixing? Alternatively we 
could silently drop the bit rather than killing the guest. :-)
It would be interesting to know, if you kill the test that fails above 
in the Xen code, whether your problems all go away. It's the test that 
starts:
    if ( unlikely(l1v & (_PAGE_GLOBAL|_PAGE_PAT)) )

 -- Keir



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