[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Live migration and PV device handling

Hi all,

I am trying to understand how live-migration happens in xen. I am
looking in the HVM guest case and I have dug into the relevant parts
of the toolstack and the hypervisor regarding memory, vCPU context

In particular, I am interested in how PV device migration happens. I
assume that the guest is not aware of any suspend/resume operations
being done, nor do its PFNs need to change, so I suspect xenstore
device entries (for VIFs / VBDs) for the guest remain intact. However,
it is not entirely clear to me how xenstore entry migration happens.

As I am probably missing something obvious, could someone point me to
the part of the code where xenstore entries are being copied across to
the destination node?




Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.