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Re: [Qemu-devel] [RFC v2 4/6] hostmem: return recreated MemoryRegion if


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [RFC v2 4/6] hostmem: return recreated MemoryRegion if current can't be reused
Date: Mon, 08 Jun 2015 17:30:20 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0


On 08/06/2015 17:19, Igor Mammedov wrote:
>  MemoryRegion *
>  host_memory_backend_get_memory(HostMemoryBackend *backend, Error **errp)
>  {
> +    UserCreatableClass *ucc = USER_CREATABLE_GET_CLASS(backend);
> +
> +    if (memory_region_is_hva_mapped(&backend->mr)) {
> +        object_unparent(OBJECT(&backend->mr));
> +        ucc->complete(USER_CREATABLE(backend), errp);
> +    }

I'm not sure I understand this, and the commit message... doesn't help.

Is it for the case where you unplug memory and then reuse the old
backend?  Can we just outlaw this, forcing each memory backend to be
used only once?

Paolo



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