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Re: [libvirt] [PATCH v3 00/14] Implement post-copy migration



On Wed, Mar 02, 2016 at 12:42:21 +0100, Jiri Denemark wrote:
> (See "Add public APIs for post-copy migration" patch for more details
> about post-copy migration.)
> 
> Post-copy support was originally written by Cristian Klein in 2014, but
> no one touched the series since then. Some patches in this series are
> modified versions of the old patches from Cristian, some patches had to
> be rewritten from scratch since libvirt code changed a lot (we started
> using migration events), and some patches are completely new.
> 
> While post-copy migration is included in QEMU 2.5.0, it didn't support
> everything libvirt needs. Thus you need QEMU from git to use post-copy.
> Luckily, the QEMU migration capability we need to enable to use
> post-copy is still prefixed with "x-", which means it's still considered
> experimental. We are pretty sure the interface QEMU provides is OK, but
> we'd like to wait until seamless SPICE migration is fixed for post-copy
> before removing the experimental prefix. This should hopefully happen in
> time for QEMU 2.6.0.

The SPICE issue has already been fixed in QEMU. Dave Gilbert will send a
patch for removing the "x-" prefix and once it is pushed we can update
this code and push it to libvirt (as long as this series gets positive
review, of course).

Jirka


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