Re: [PATCH v3] SUPPORT.md: extend security support for x86 hosts to 12 TiB of memory

[Julien Grall <julien@xxxxxxx>]

Hi Jan,

On 02/06/2022 09:43, Jan Beulich wrote:
> c49ee0329ff3 ("SUPPORT.md: limit security support for hosts with very
> much memory"), as a result of XSA-385, restricted security support to
> 8 TiB of host memory. While subsequently further restricted for Arm,
> extend this to 12 TiB on x86, putting in place a guest restriction to
> 8 TiB (or yet less for Arm) in exchange.
>
> A 12 TiB x86 host was certified successfully for use with Xen 4.14 as
> per https://www.suse.com/nbswebapp/yesBulletin.jsp?bulletinNumber=150753.
> This in particular included running as many guests (2 TiB each) as
> possible in parallel, to actually prove that all the memory can be used
> like this. It may be relevant to note that the Optane memory there was
> used in memory-only mode, with DRAM acting as cache.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> Acked-by: George Dunlap <george.dunlap@xxxxxxxxxx>
Acked-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall