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| author | David Hildenbrand <david@redhat.com> | 2020-06-26 09:22:47 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-07-03 07:57:04 -0400 |
| commit | 0bc7806c5a670fa0bd160caf07489a5106a67d55 (patch) | |
| tree | b2dc4633af2ee77b06d0542a90e6f4e95f69f482 /include/hw/virtio | |
| parent | 43e5495027c5b784d23bd0cd9e5a4308a43b9603 (diff) | |
| download | qemu-0bc7806c5a670fa0bd160caf07489a5106a67d55.zip | |
virtio-mem: Exclude unplugged memory during migration
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>
Diffstat (limited to 'include/hw/virtio')
| -rw-r--r-- | include/hw/virtio/virtio-mem.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio-mem.h b/include/hw/virtio/virtio-mem.h index b74c77cd42..0778224964 100644 --- a/include/hw/virtio/virtio-mem.h +++ b/include/hw/virtio/virtio-mem.h @@ -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 { |