On Wed, 13 Dec 2017 18:08:04 +0000
"Dr. David Alan Gilbert (git)" <dgilb...@redhat.com> wrote:
> From: "Dr. David Alan Gilbert" <dgilb...@redhat.com>
>
> Add a 2nd 'vhost_memory' structure that will be used to build
> the new version as the listener iterates over the address space.
I'd suggest to add temporary 'mem_sections' instead and
create/use/free temporary 'vhost_memory' structure at commit time,
(1 less duplicated data set to keep in memory)
>
> Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
> ---
> hw/virtio/vhost.c | 3 +++
> include/hw/virtio/vhost.h | 1 +
> 2 files changed, 4 insertions(+)
>
> diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
> index c7ce7baf9b..4523f45587 100644
> --- a/hw/virtio/vhost.c
> +++ b/hw/virtio/vhost.c
> @@ -632,6 +632,8 @@ static void vhost_begin(MemoryListener *listener)
> memory_listener);
> dev->mem_changed_end_addr = 0;
> dev->mem_changed_start_addr = -1;
> +
> + dev->tmp_mem = g_malloc0(offsetof(struct vhost_memory, regions));
> }
>
> static void vhost_commit(MemoryListener *listener)
> @@ -641,6 +643,7 @@ static void vhost_commit(MemoryListener *listener)
> uint64_t log_size;
> int r;
>
> + g_free(dev->tmp_mem);
> if (!dev->memory_changed) {
> return;
> }
> diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h
> index 467dc7794b..41f9e569be 100644
> --- a/include/hw/virtio/vhost.h
> +++ b/include/hw/virtio/vhost.h
> @@ -70,6 +70,7 @@ struct vhost_dev {
> bool memory_changed;
> hwaddr mem_changed_start_addr;
> hwaddr mem_changed_end_addr;
> + struct vhost_memory *tmp_mem;
> const VhostOps *vhost_ops;
> void *opaque;
> struct vhost_log *log;
