Xen devel - Mar 2006 - RE: Assertion ''! IS_INVALID_M2P_ENTRY(gpfn)'' failedkillsmachine

Keir Fraser wrote:
> On 29 Mar 2006, at 17:09, Nakajima, Jun wrote:
> 
>> Are you doing live migration? In the default setup for domUs, the
>> shadow code is never used.
> 
> The mini patches for Linux we submitted to lkml depend on shadow mode.
> 
>   -- Keir
> 
So this is _not_ for 3.0.2? I expect some hiccups with that if domUs
start using other than log-dirty mode (e.g. SHM_translate). For this
particular bug, I think the P2M table is missing the mapping for the
xenpage_list. We''ll take a look at that.

For PAE or x86-64, although xenlinux uses subset of the shadow
sub-modes, I guess we have more bugs with domUs simply because we
haven''t tested (we have higher confidence with log-dirty mode for domU
live migration). HVM guests have been tested well, and they use the
shadow mode combined with SHM_external (which domUs don''t).

Jun
---
Intel Open Source Technology Center

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On 29 Mar 2006, at 18:12, Nakajima, Jun wrote:
> So this is _not_ for 3.0.2? I expect some hiccups with that if domUs
> start using other than log-dirty mode (e.g. SHM_translate). For this
> particular bug, I think the P2M table is missing the mapping for the
> xenpage_list. We''ll take a look at that.
The mini-linux patches are not going into our repository at all, so the 
patches have no relation to our release process.
> For PAE or x86-64, although xenlinux uses subset of the shadow
> sub-modes, I guess we have more bugs with domUs simply because we
> haven''t tested (we have higher confidence with log-dirty mode for
domU
> live migration). HVM guests have been tested well, and they use the
> shadow mode combined with SHM_external (which domUs don''t).
Well, Christian''s fixed one or two bugs today. We''re finding
the bugs
one by one. :-)

  -- Keir


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