[libvirt PATCH 5/7] Add VIR_MIGRATE_ZEROCOPY flag
The flag can be used to enable zero-copy mechanism for migrating memory
pages.
Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com>
---
include/libvirt/libvirt-domain.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-domain.h
index 1ea3284e63..05344aaa95 100644
--- a/include/libvirt/libvirt-domain.h
+++ b/include/libvirt/libvirt-domain.h
@@ -1089,6 +1089,15 @@ typedef enum {
* Since: 8.5.0
*/
VIR_MIGRATE_POSTCOPY_RESUME = (1 << 19),
+
+ /* Use zero-copy mechanism for migrating memory pages. For QEMU/KVM this
+ * means QEMU will be temporarily allowed to lock all guest pages in host's
+ * memory, although only those that are queued for transfer will be locked
+ * at the same time.
+ *
+ * Since: 8.5.0
+ */
+ VIR_MIGRATE_ZEROCOPY = (1 << 20),
} virDomainMigrateFlags;
--
2.35.1