Re: [PATCH v1 0/2] vhost: memslot handling improvements

[Stefan Hajnoczi]

On Thu, Feb 16, 2023 at 12:47:50PM +0100, David Hildenbrand wrote:
> Following up on my previous work to make virtio-mem consume multiple
> memslots dynamically [1] that requires precise accounting between used vs.
> reserved memslots, I realized that vhost makes this extra hard by
> filtering out some memory region sections (so they don't consume a
> memslot) in the vhost-user case, which messes up the whole memslot
> accounting.
> 
> This series fixes what I found to be broken and prepares for more work on
> [1]. Further, it cleanes up the merge checks that I consider unnecessary.
> 
> [1] https://lkml.kernel.org/r/20211027124531.57561-8-david@redhat.com
> 
> Cc: "Michael S. Tsirkin" <mst@redhat.com>
> Cc: Stefan Hajnoczi <stefanha@redhat.com>
> Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
> 
> David Hildenbrand (2):
>   vhost: Defer filtering memory sections until building the vhost memory
>     structure
>   vhost: Remove vhost_backend_can_merge() callback
> 
>  hw/virtio/vhost-user.c            | 14 -----
>  hw/virtio/vhost-vdpa.c            |  1 -
>  hw/virtio/vhost.c                 | 85 ++++++++++++++++++++-----------
>  include/hw/virtio/vhost-backend.h |  4 --
>  4 files changed, 56 insertions(+), 48 deletions(-)
> 
> -- 
> 2.39.1
> 

I'm not familiar enough with the memslot code to review this properly,
but overall it looks okay:

Acked-by: Stefan Hajnoczi <stefanha@redhat.com>

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