| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
RE: [Xen-devel] Live migration leaves page tables read-only?
> Solaris implements PROT_NONE by entirely invalidating the PTE (ie. it
> becomes zero). Hence our PTEs always had either zero or have the
PRESENT
> bit set. The only exception to this was adding some fixage to allow
> for the old Xen writable page table approach which temporarily made
> the upper table non-PRESENT.
>
> So you can make not-present, but non-zero entries mean anything you
want.
> As long as it's the guest OS that creates the entries, we'll just not
do
> it.
Just to be confirm: in Solaris there are no not-present PTE's that
contain machine addresses.
This means we need to implement the scheme that Keir suggested to enable
the guest OS to tell xen/xc_save/restore about flags in not-present PTEs
that should trigger a m2p conversion.
Ian
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home