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virtio-mem: Drop precopy notifier 

Migration code now properly handles RAMBlocks which are indirectly managed
by a RamDiscardManager. No need for manual handling via the free page
optimization interface, let's get rid of it.

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
David Hildenbrand 2021-10-11 19:53:42 +02:00 committed by Juan Quintela
parent be39b4cd20
commit f4578df399
2 changed files with 0 additions and 37 deletions
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34
hw/virtio/virtio-mem.c
View File

@ -776,7 +776,6 @@ static void virtio_mem_device_realize(DeviceState *dev, Error **errp)
host_memory_backend_set_mapped(vmem->memdev, true);
vmstate_register_ram(&vmem->memdev->mr, DEVICE(vmem));
qemu_register_reset(virtio_mem_system_reset, vmem);
precopy_add_notifier(&vmem->precopy_notifier);
/*
* Set ourselves as RamDiscardManager before the plug handler maps the
@ -796,7 +795,6 @@ static void virtio_mem_device_unrealize(DeviceState *dev)
* found via an address space anymore. Unset ourselves.
*/
memory_region_set_ram_discard_manager(&vmem->memdev->mr, NULL);
precopy_remove_notifier(&vmem->precopy_notifier);
qemu_unregister_reset(virtio_mem_system_reset, vmem);
vmstate_unregister_ram(&vmem->memdev->mr, DEVICE(vmem));
host_memory_backend_set_mapped(vmem->memdev, false);
@ -1089,43 +1087,11 @@ static void virtio_mem_set_block_size(Object *obj, Visitor *v, const char *name,
vmem->block_size = value;
}
static int virtio_mem_precopy_exclude_range_cb(const VirtIOMEM *vmem, void *arg,
uint64_t offset, uint64_t size)
{
void * const host = qemu_ram_get_host_addr(vmem->memdev->mr.ram_block);
qemu_guest_free_page_hint(host + offset, size);
return 0;
}
static void virtio_mem_precopy_exclude_unplugged(VirtIOMEM *vmem)
{
virtio_mem_for_each_unplugged_range(vmem, NULL,
virtio_mem_precopy_exclude_range_cb);
}
static int virtio_mem_precopy_notify(NotifierWithReturn *n, void *data)
{
VirtIOMEM *vmem = container_of(n, VirtIOMEM, precopy_notifier);
PrecopyNotifyData *pnd = data;
switch (pnd->reason) {
case PRECOPY_NOTIFY_AFTER_BITMAP_SYNC:
virtio_mem_precopy_exclude_unplugged(vmem);
break;
default:
break;
}
return 0;
}
static void virtio_mem_instance_init(Object *obj)
{
VirtIOMEM *vmem = VIRTIO_MEM(obj);
notifier_list_init(&vmem->size_change_notifiers);
vmem->precopy_notifier.notify = virtio_mem_precopy_notify;
QLIST_INIT(&vmem->rdl_list);
object_property_add(obj, VIRTIO_MEM_SIZE_PROP, "size", virtio_mem_get_size,

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

@ -65,9 +65,6 @@ struct VirtIOMEM {
/* notifiers to notify when "size" changes */
NotifierList size_change_notifiers;
/* don't migrate unplugged memory */
NotifierWithReturn precopy_notifier;
/* listeners to notify on plug/unplug activity. */
QLIST_HEAD(, RamDiscardListener) rdl_list;
};