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Re: [PATCH v3 4/5] vhost: Add high-level state save/load functions
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [PATCH v3 4/5] vhost: Add high-level state save/load functions |
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Date: |
Mon, 25 Sep 2023 16:23:53 -0400 |
On Fri, Sep 15, 2023 at 12:25:29PM +0200, Hanna Czenczek wrote:
> vhost_save_backend_state() and vhost_load_backend_state() can be used by
> vhost front-ends to easily save and load the back-end's state to/from
> the migration stream.
>
> Because we do not know the full state size ahead of time,
> vhost_save_backend_state() simply reads the data in 1 MB chunks, and
> writes each chunk consecutively into the migration stream, prefixed by
> its length. EOF is indicated by a 0-length chunk.
>
> Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
> ---
> include/hw/virtio/vhost.h | 35 +++++++
> hw/virtio/vhost.c | 204 ++++++++++++++++++++++++++++++++++++++
> 2 files changed, 239 insertions(+)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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