[RFC PATCH 18/41] qemu: snapshot: Don't propagate bitmaps to upper layers

Eric Blake eblake at redhat.com
Fri Jun 19 20:01:25 UTC 2020

On 6/9/20 10:00 AM, Peter Krempa wrote:
> With the upcoming changes to use 'dirty-bitmap-populate' job, this will
> no longer be required to do the backups, so we can stop creating bitmaps
> which would be pointless.

Even if qemu 5.1 adds block-dirty-bitmap-populate, don't we still want 
to keep supporting qemu 5.0 where it was not present, and therefore need 
code for propagating bitmaps during snapshot creation?  Or is the plan 
that you won't enable incremental backup support in libvirt unless you 
detect new enough qemu including bitmap-populate support?

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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