On 01/12/14 14:38, David Vrabel wrote:
> On 20/11/14 18:28, Andrew Cooper wrote:
>> 1) Freeze the guests p2m during live migrate
>> 2) Deep p2m dirty tracking
>> 3) Eagerly check for p2m structure changes.
>> 4) Request p2m structure change updates from the guest
>> Proposed solution: A combinatio
On 20/11/14 18:28, Andrew Cooper wrote:
>
> 1) Freeze the guests p2m during live migrate
> 2) Deep p2m dirty tracking
> 3) Eagerly check for p2m structure changes.
> 4) Request p2m structure change updates from the guest
> Proposed solution: A combination of 2, 3 and 4.
Option 5: don't change a
On 27/11/14 15:28, Tim Deegan wrote:
> At 15:16 + on 27 Nov (1417097812), Andrew Cooper wrote:
>> On 27/11/14 15:00, Tim Deegan wrote:
>>> At 10:54 + on 21 Nov (1416563695), Andrew Cooper wrote:
On 21/11/14 10:43, Jan Beulich wrote:
On 20.11.14 at 19:28, wrote:
>> Should
At 15:16 + on 27 Nov (1417097812), Andrew Cooper wrote:
> On 27/11/14 15:00, Tim Deegan wrote:
> > At 10:54 + on 21 Nov (1416563695), Andrew Cooper wrote:
> >> On 21/11/14 10:43, Jan Beulich wrote:
> >> On 20.11.14 at 19:28, wrote:
> Should the guest change the p2m structure durin
On 27/11/14 15:00, Tim Deegan wrote:
> At 10:54 + on 21 Nov (1416563695), Andrew Cooper wrote:
>> On 21/11/14 10:43, Jan Beulich wrote:
>> On 20.11.14 at 19:28, wrote:
Should the guest change the p2m structure during live migration, the
toolstack ends up with a stale p2m with a n
At 10:32 + on 21 Nov (1416562351), Andrew Cooper wrote:
> On 21/11/14 05:41, Juergen Gross wrote:
> > On 11/20/2014 07:28 PM, Andrew Cooper wrote:
> >> Hello,
> >>
> >> Tim, David and I were discussing this over lunch. This email is a
> >> (hopefully accurate) account of our findings, and pote
At 10:54 + on 21 Nov (1416563695), Andrew Cooper wrote:
> On 21/11/14 10:43, Jan Beulich wrote:
> On 20.11.14 at 19:28, wrote:
> >> Should the guest change the p2m structure during live migration, the
> >> toolstack ends up with a stale p2m with a non-p2m frame in the middle,
> >> resulti
On 11/21/2014 01:15 PM, Jan Beulich wrote:
On 21.11.14 at 12:24, wrote:
On Fri, 2014-11-21 at 12:20 +0100, Juergen Gross wrote:
On 11/21/2014 12:15 PM, Ian Campbell wrote:
On Fri, 2014-11-21 at 11:07 +, Andrew Cooper wrote:
On 21/11/14 10:46, Ian Campbell wrote:
On Fri, 2014-11-21 at 10
>>> On 21.11.14 at 12:24, wrote:
> On Fri, 2014-11-21 at 12:20 +0100, Juergen Gross wrote:
>> On 11/21/2014 12:15 PM, Ian Campbell wrote:
>> > On Fri, 2014-11-21 at 11:07 +, Andrew Cooper wrote:
>> >> On 21/11/14 10:46, Ian Campbell wrote:
>> >>> On Fri, 2014-11-21 at 10:24 +, Andrew Coope
On Fri, 2014-11-21 at 12:20 +0100, Juergen Gross wrote:
> On 11/21/2014 12:15 PM, Ian Campbell wrote:
> > On Fri, 2014-11-21 at 11:07 +, Andrew Cooper wrote:
> >> On 21/11/14 10:46, Ian Campbell wrote:
> >>> On Fri, 2014-11-21 at 10:24 +, Andrew Cooper wrote:
> On 21/11/14 09:43, Ian C
On 11/21/2014 12:15 PM, Ian Campbell wrote:
On Fri, 2014-11-21 at 11:07 +, Andrew Cooper wrote:
On 21/11/14 10:46, Ian Campbell wrote:
On Fri, 2014-11-21 at 10:24 +, Andrew Cooper wrote:
On 21/11/14 09:43, Ian Campbell wrote:
I don't see any (explicit) mention of the pfn_to_mfn_frame_
On Fri, 2014-11-21 at 11:07 +, Andrew Cooper wrote:
> On 21/11/14 10:46, Ian Campbell wrote:
> > On Fri, 2014-11-21 at 10:24 +, Andrew Cooper wrote:
> >> On 21/11/14 09:43, Ian Campbell wrote:
> >>> I don't see any (explicit) mention of the pfn_to_mfn_frame_list_list
> >>> here, where does
On 21/11/14 10:46, Ian Campbell wrote:
> On Fri, 2014-11-21 at 10:24 +, Andrew Cooper wrote:
>> On 21/11/14 09:43, Ian Campbell wrote:
>>> I don't see any (explicit) mention of the pfn_to_mfn_frame_list_list
>>> here, where does that fit in?
>>>
>> It is referenced several times, although not b
On 21/11/14 10:43, Jan Beulich wrote:
On 20.11.14 at 19:28, wrote:
>> Should the guest change the p2m structure during live migration, the
>> toolstack ends up with a stale p2m with a non-p2m frame in the middle,
>> resulting in bogus cross-referencing. Should the guest change an entry
>> in
On Fri, 2014-11-21 at 10:24 +, Andrew Cooper wrote:
> On 21/11/14 09:43, Ian Campbell wrote:
>
> > On Thu, 2014-11-20 at 18:28 +, Andrew Cooper wrote:
> > > Realistically, this means no updates to the
> > > p2m at all, due to several potential race conditions.
> > From the rest of the mail
>>> On 20.11.14 at 19:28, wrote:
> Should the guest change the p2m structure during live migration, the
> toolstack ends up with a stale p2m with a non-p2m frame in the middle,
> resulting in bogus cross-referencing. Should the guest change an entry
> in the p2m, the p2m frame itself will be rese
On 21/11/14 05:41, Juergen Gross wrote:
> On 11/20/2014 07:28 PM, Andrew Cooper wrote:
>> Hello,
>>
>> Tim, David and I were discussing this over lunch. This email is a
>> (hopefully accurate) account of our findings, and potential solutions.
>> (If I have messed up, please shout.)
>>
>> Currently
On 21/11/14 09:43, Ian Campbell wrote:
> On Thu, 2014-11-20 at 18:28 +, Andrew Cooper wrote:
>> Realistically, this means no updates to the
>> p2m at all, due to several potential race conditions.
> From the rest of the mail it seems as if you are talking primarily about
> changes to the p2m *s
On Thu, 2014-11-20 at 18:28 +, Andrew Cooper wrote:
> Realistically, this means no updates to the
> p2m at all, due to several potential race conditions.
>From the rest of the mail it seems as if you are talking primarily about
changes to the p2m *structure*, i.e. which guest frames contain th
On 11/20/2014 07:28 PM, Andrew Cooper wrote:
Hello,
Tim, David and I were discussing this over lunch. This email is a
(hopefully accurate) account of our findings, and potential solutions.
(If I have messed up, please shout.)
Currently, correct live migration of PV domains relies on the toolst
Hello,
Tim, David and I were discussing this over lunch. This email is a
(hopefully accurate) account of our findings, and potential solutions.
(If I have messed up, please shout.)
Currently, correct live migration of PV domains relies on the toolstack
(which has a live mapping of the guests p2
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