On 06/29/2018 03:03 AM, Denis Plotnikov wrote:
The capability is used for the background vmstate saving
using the migration infrastructure.
Background vmstate saving means that the majority of vmstate
(RAM) is saved in the background when VM's vCPUS are running.
This helps to reduce the VM downtime on VM snapshotting.
Signed-off-by: Denis Plotnikov <dplotni...@virtuozzo.com>
---
migration/migration.c | 35 +++++++++++++++++++++++++++++++++++
migration/migration.h | 1 +
qapi/migration.json | 6 +++++-
3 files changed, 41 insertions(+), 1 deletion(-)
+++ b/qapi/migration.json
@@ -352,12 +352,16 @@
#
# @x-multifd: Use more than one fd for migration (since 2.11)
#
+# @background-snapshot: Using migration infrastructure makes VM snapshot
+# saving its RAM in background. This reduces VM downtime. (since 2.12)
You've missed 2.12; the next release is 3.0 (and even then, we're fast
coming up on soft freeze, so a maintainer must be willing to take this
feature soon, or it will become 3.1 material).
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
