Jan Beulich
2011-Jul-15 08:55 UTC
[Xen-devel] [PATCH] x86: fix guest migration after c/s 20892:d311d1efc25e
Guests would not manage to run successfully after being migrated to a
host having sufficiently much more memory than the host they were
originally started on.
Subsequently the plan is to re-enable the changes behavior under the
control of a guest kernel announced feature flag.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -4861,7 +4861,7 @@ long arch_memory_op(int op, XEN_GUEST_HA
.max_mfn = MACH2PHYS_NR_ENTRIES - 1
};
- if ( !mem_hotplug )
+ if ( !mem_hotplug && current->domain == dom0 )
mapping.max_mfn = max_page - 1;
if ( copy_to_guest(arg, &mapping, 1) )
return -EFAULT;
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Ian Campbell
2011-Jul-15 08:58 UTC
[Xen-devel] Re: [PATCH] x86: fix guest migration after c/s 20892:d311d1efc25e
On Fri, 2011-07-15 at 09:55 +0100, Jan Beulich wrote:> Guests would not manage to run successfully after being migrated to a > host having sufficiently much more memory than the host they were > originally started on. > > Subsequently the plan is to re-enable the changes behavior under the > control of a guest kernel announced feature flag. > > Signed-off-by: Jan Beulich <jbeulich@novell.com>Thanks Jan, I think this is a good workaround for the time being. Acked-by: Ian Campbell <ian.campbell@citrix.com>> > --- a/xen/arch/x86/mm.c > +++ b/xen/arch/x86/mm.c > @@ -4861,7 +4861,7 @@ long arch_memory_op(int op, XEN_GUEST_HA > .max_mfn = MACH2PHYS_NR_ENTRIES - 1 > }; > > - if ( !mem_hotplug ) > + if ( !mem_hotplug && current->domain == dom0 ) > mapping.max_mfn = max_page - 1; > if ( copy_to_guest(arg, &mapping, 1) ) > return -EFAULT; > > >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel