[Xen-devel] RE: tmem and localhost migration

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> 08.02.10 18:24 >>>
>Yes, tmem is compatible with migration (and save/restore)
>and was tested with localhost migration as well as
>cross-host migration.  BUT, I don't know if I tested
>it when there is no free (but only freeable) memory,
>which might, as suggested in the separate thread,
>fail due to shadow memory requiring order=2 allocations.
>
>Or are you seeing a different problem?

Unfortunately we seem to: For one there is an apparent deadlock
(DomU having read-locked tmem_lock thus preventing Dom0 to obtain
a write lock thereof, DomU spinning to acquire a read lock in
obj_find()). Also, I think numerous domain references get leaked, but
I think I have a patch ready to address that (will send out later today,
after having it at least build-validated).

Jan


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