fridtjof/qemu-cr16
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

virtio-mem: Exclude unplugged memory during migration

Browse source 
The content of unplugged memory is undefined and should not be migrated,
ever. Exclude all unplugged memory during precopy using the precopy notifier
infrastructure introduced for free page hinting in virtio-balloon.

Unplugged memory is marked as "not dirty", meaning it won't be
considered for migration.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200626072248.78761-21-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
David Hildenbrand 2020-06-26 09:22:47 +02:00 • committed by Michael S. Tsirkin
parent 43e5495027
commit 0bc7806c5a
2 changed files with 56 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/hw/virtio/virtio-mem.h
View file

@ -67,6 +67,9 @@ typedef struct VirtIOMEM {
/* notifiers to notify when "size" changes */
NotifierList size_change_notifiers;
/* don't migrate unplugged memory */
NotifierWithReturn precopy_notifier;
} VirtIOMEM;
typedef struct VirtIOMEMClass {