[PATCH 2/8] qemuBuildMemoryBackendProps: Respect //memoryBacking/allocation/@mode=immediate

[Michal Privoznik]

If user specifies immediate memory allocation in the domain XML,
they want QEMU to fully allocate its memory. And if the memory
was allocated using plain '-m' then we would honour it. But, if a
memory backend is used, then we don't set the prealloc attribute
of the backend.

Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
 src/qemu/qemu_command.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index ef6866f6c8..e1c4be03e5 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -3044,6 +3044,9 @@ qemuBuildMemoryBackendProps(virJSONValuePtr *backendProps,
     if (discard == VIR_TRISTATE_BOOL_ABSENT)
         discard = def->mem.discard;
 
+    if (def->mem.allocation == VIR_DOMAIN_MEMORY_ALLOCATION_IMMEDIATE)
+        prealloc = true;
+
     if (virDomainNumatuneGetMode(def->numa, mem->targetNode, &mode) < 0 &&
         virDomainNumatuneGetMode(def->numa, -1, &mode) < 0)
         mode = VIR_DOMAIN_NUMATUNE_MEM_STRICT;
-- 
2.26.2