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deprecate -mem-path fallback to anonymous RAM

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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>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190626074228.11558-1-imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Igor Mammedov 2019-06-26 03:42:28 -04:00 • committed by Eduardo Habkost
parent d730b9d1f2
commit cb79224b7e
2 changed files with 13 additions and 2 deletions
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6
hw/core/numa.c
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@ -479,8 +479,10 @@ static void allocate_system_memory_nonnuma(MemoryRegion *mr, Object *owner,
if (mem_prealloc) {
exit(1);
}
error_report("falling back to regular RAM allocation.");
warn_report("falling back to regular RAM allocation");
error_printf("This is deprecated. Make sure that -mem-path "
" specified path has sufficient resources to allocate"
" -m specified RAM amount");
/* Legacy behavior: if allocation failed, fall back to
* regular RAM allocation.
*/