Re: [Qemu-devel] [GSoC] Help needed in implementing live migration

[Sukrit Bhatnagar]

On Tue, 25 Jun 2019 at 00:11, Dr. David Alan Gilbert
<address@hidden> wrote:
>
> * Sukrit Bhatnagar (address@hidden) wrote:
> > Hi David,
> >
> > I am Sukrit, GSoC participant working on PVRDMA live migration.
> > We had a short chat about vmxnet3 migration about a week ago
> > on the IRC channel.
> >
> > I am facing an issue while doing migration of the pvrdma device.
> > While loading the device state, we need to perform a few dma
> > mappings on the destination. But on the destination, the migration
> > fails due a BounceBuffer being locked (in_use). This global
> > BounceBuffer is used in address_space_map/unmap functions
> > which the rdma_pci_dma_map/unmap calls.
> > Essentially, we need a way to remap guest physical address on
> > the destination after migration.
> >
> > I had posted an RFC a while ago on the list:
> > https://lists.gnu.org/archive/html/qemu-devel/2019-06/msg04924.html
> > https://lists.gnu.org/archive/html/qemu-devel/2019-06/msg04923.html
> >
> > My mentors (Marcel and Yuval) told me to ask you for help
> > regarding this. It would be really great if you can guide me in
> > finding a workaround for this.
>
> Hi,
>   I'll have a look; I need to get some other things finished first.

Adding cc: qemu-devel, sorry for the private email.

> Dave
> > Thanks,
> > Sukrit
> --
> Dr. David Alan Gilbert / address@hidden / Manchester, UK