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Re: [Qemu-devel] [PATCH v2 3/5] migration: do explicit incoming setup fo
Dr. David Alan Gilbert
Re: [Qemu-devel] [PATCH v2 3/5] migration: do explicit incoming setup for rdma
Wed, 27 Jun 2018 15:13:04 +0100
* Peter Xu (address@hidden) wrote:
> On Wed, Jun 27, 2018 at 01:25:45PM +0100, Dr. David Alan Gilbert wrote:
> > * Peter Xu (address@hidden) wrote:
> > > RDMA does not support postcopy recovery, so no need to go into such
> > > logic. Instead of calling migration_fd_process_incoming(), let's call
> > > the two functions that setup the incoming migration. There should have
> > > no functional change at all.
> > Can you explain why we need to though? The reason I ask is that there
> > is Lidong Chen's work that gets postcopy partially working with RDMA, so
> > then the next question is bound to be recovery.
> Ah if so this patch needs to change. Could you paste me the message
> id of the work? Or link?
> After all I'll need to keep this bit, but I am just curious about what
> is "partially" mean here. :)
It enables postcopy with RDMA, but once it switches into postcopy mode
it doesn't use the fast features of RDMA, it still shuffles the data
as a stream (using some more basic RDMA features).
> Peter Xu
Dr. David Alan Gilbert / address@hidden / Manchester, UK
[Qemu-devel] [PATCH v2 4/5] migration: unbreak postcopy recovery, Peter Xu, 2018/06/27
[Qemu-devel] [PATCH v2 5/5] migration: unify incoming processing, Peter Xu, 2018/06/27