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Subject: Re: [PATCH 1/2] xen: expand BALLOON_MEMORY_HOTPLUG description
To:     Roger Pau Monne <roger.pau@citrix.com>,
        linux-kernel@vger.kernel.org
Cc:     Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Stefano Stabellini <sstabellini@kernel.org>,
        xen-devel@lists.xenproject.org
References: <20200324150015.50496-1-roger.pau@citrix.com>
From:   =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= <jgross@suse.com>
Message-ID: <42a7b408-1ea1-04fa-e70b-cbdaba54c558@suse.com>
Date:   Tue, 24 Mar 2020 16:13:48 +0100
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On 24.03.20 16:00, Roger Pau Monne wrote:
> To mention it's also useful for PVH or HVM domains that require
> mapping foreign memory or grants.
> 
> Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
> ---
> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> Cc: Juergen Gross <jgross@suse.com>
> Cc: Stefano Stabellini <sstabellini@kernel.org>
> Cc: xen-devel@lists.xenproject.org
> ---
>   drivers/xen/Kconfig | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
> index 61212fc7f0c7..57ddd6f4b729 100644
> --- a/drivers/xen/Kconfig
> +++ b/drivers/xen/Kconfig
> @@ -19,6 +19,10 @@ config XEN_BALLOON_MEMORY_HOTPLUG
>   	  It is very useful on critical systems which require long
>   	  run without rebooting.
>   
> +	  It's also very useful for translated domains (PVH or HVM) to obtain

I'd rather say "(non PV)" or "(PVH, HVM or Arm)".

> +	  unpopulated physical memory ranges to use in order to map foreign
> +	  memory or grants.
> +
>   	  Memory could be hotplugged in following steps:
>   
>   	    1) target domain: ensure that memory auto online policy is in
> 

With that:

Reviewed-by: Juergen Gross <jgross@suse.com>


Juergen