RE: [Xen-devel] Live migration leaves page tables read-only?

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> I forgot to mention that a very simple test case I wrote using shared
> memory and the mprotect call didn't fail. So, the only test case I
have
> at the moment is to run SAP.

What happens if you use non-live relo?

Also, can you repro on 32b?

Thanks,
Ian

 
> John Byrne
> 
> John Byrne wrote:
> >
> > I have been trying to debug a problem live-migrating SAP on
Xen-3.0.3
> > x86-64 (I also tested Xen-unstable changeset 12548) without success.
> >
> > SAP seems to run fine on a given host; live-migrating it to another
host
> > causes the guest to almost immediately panic in the mprotect() call
in
> > the change_pte_range() routine in the set_pte_at() macro because the
> > page table page it is trying to update is write-protected.
> >
> > My attempts at understanding where this is coming from have come to
> > naught. Any help in running this down would be appreciated. I am
> > perfectly willing/able to write some debugging code if I am given a
few
> > clues what to look for.
> >
> > Thanks,
> >
> > John Byrne
> >
> >
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
> >
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel