Message ID | 873890bc-e5fd-a9ed-77ff-7bd06d390ae9@suse.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | [v3] SUPPORT.md: extend security support for x86 hosts to 12 TiB of memory | expand |
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@suse.com> > Acked-by: George Dunlap <george.dunlap@citrix.com> Acked-by: Julien Grall <jgrall@amazon.com> Cheers,
--- a/SUPPORT.md +++ b/SUPPORT.md @@ -50,7 +50,7 @@ For the Cortex A57 r0p0 - r1p1, see Erra ### Physical Memory - Status, x86: Supported up to 8 TiB. Hosts with more memory are supported, but not security supported. + Status, x86: Supported up to 12 TiB. Hosts with more memory are supported, but not security supported. Status, Arm32: Supported up to 12 GiB Status, Arm64: Supported up to 2 TiB @@ -121,6 +121,14 @@ ARM only has one guest type at the momen Status: Supported +## Guest Limits + +### Memory + + Status, x86: Supported up to 8 TiB. Guests with more memory, but less than 16 TiB, are supported, but not security supported. + Status, Arm32: Supported up to 12 GiB + Status, Arm64: Supported up to 1 TiB + ## Hypervisor file system ### Build info