Re: [Xen-devel] [PATCH 4/6] xen-gntdev: Support mapping in HVM domains

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

> +static int unmap_grant_pages(struct grant_map *map, int offset, int pages);
> +
>  /* ------------------------------------------------------------------ */
>  
>  static void gntdev_print_maps(struct gntdev_priv *priv,
> @@ -179,11 +184,34 @@ static void gntdev_put_map(struct grant_map *map)
>  
>       atomic_sub(map->count, &pages_mapped);
>  
> -     if (map->pages)
> +     if (map->pages) {
> +             if (!use_ptemod)
> +                     unmap_grant_pages(map, 0, map->count);

In the past (before this patch) the unmap_grant_pages would be called
on the .ioctl, .release, and .close (on VMA). This adds it now also
on the mmu_notifier_ops paths. Why?


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