Re: [libvirt] [PATCH 11/19] qemu: Migration job on source daemon
On Fri, Jul 08, 2011 at 01:34:16AM +0200, Jiri Denemark wrote:
Make MIGRATION_OUT use the new helper methods.
This also introduces new protection to migration v3 process: the
migration job is held from Begin to Confirm to avoid changes to a domain
during migration (esp. between Begin and Perform phases). This change,
however brings a small issue when Prepare step fails during normal (not
p2p or tunneled) migration when old client talks to new libvirtd. The
old client doesn't call Confirm (with cancelled == 1) to end the
migration job. I'm open to suggestions how to solve this in the best
way. My idea is to use flags for Begin3 and Perform3 that would enable
this extra protection by moving migration job start from Perform to
Begin phase while maintaining the old behavior if the flags are not set.
Note that virDomainAbortJob will be able to cancel migration in any
phase (i.e., not only in Perform phase).
What do you mean by 'old client' in this context ? A v3 migration
client from the 0.9.3 release, or a v2 migration client from a
< 0.9.3 release
Regards,
Daniel
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