Re: [PATCH 2/2] Revert "xen: fix p2m size in dom0 for disabled memory hotplug case"

[Boris Ostrovsky <boris.ostrovsky@oracle.com>]

On 3/17/21 7:04 AM, Roger Pau Monne wrote:
>  
>  	/*
> -	 * Clamp the amount of extra memory to a XEN_EXTRA_MEM_RATIO
> -	 * factor the base size.
> +	 * Clamp the amount of extra memory to a EXTRA_MEM_RATIO
> +	 * factor the base size.  On non-highmem systems, the base
> +	 * size is the full initial memory allocation; on highmem it
> +	 * is limited to the max size of lowmem, so that it doesn't
> +	 * get completely filled.
>  	 *
>  	 * Make sure we have no memory above max_pages, as this area
>  	 * isn't handled by the p2m management.
> +	 *
> +	 * In principle there could be a problem in lowmem systems if
> +	 * the initial memory is also very large with respect to
> +	 * lowmem, but we won't try to deal with that here.
>  	 */


This comment looks out-of-date in light of deprecated support for 32-bit PV. So I think we don't need to revert this part (except for the macro name).


-boris