On 6/25/19 11:16 AM, Igor Mammedov wrote:
Fallback might affect guest or worse whole host performance or functionality if backing file were used to share guest RAM with another process.
Patch deprecates fallback so that we could remove it in future and ensure that QEMU will provide expected behavior and fail if it can't use user provided backing file.
Signed-off-by: Igor Mammedov <imammedo@redhat.com> --- v2: * improve text language (Markus Armbruster <armbru@redhat.com>)
Is this deprecation introspectible? Does it need to be? Do we even need a deprecation period, or can we declare this a bug fix (it was a bug that we didn't fail outright on an impossible request) and do it immediately? If it is not a bug fix, perhaps it could be made introspectible by having a new boolean parameter to opt in to the failure now, rather than 2 releases from now? -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org