qemu: command: Shuffle around formating of alias for memory backend objs

Move the alias as the second formated argument and tweak the tests so
that a future refactor that will change the order doesn't break tests.

src/qemu/qemu_command.c

@@ -4623,8 +4623,8 @@ qemuBuildMemoryBackendStr(unsigned long long size,
         if (!(mem_path = qemuGetHugepagePath(&cfg->hugetlbfs[i])))
             goto cleanup;
 
-        virBufferAsprintf(&buf, "memory-backend-file,prealloc=yes,mem-path=%s",
-                          mem_path);
+        virBufferAsprintf(&buf, "memory-backend-file,id=%s%zu", aliasPrefix, id);
+        virBufferAsprintf(&buf, ",prealloc=yes,mem-path=%s", mem_path);
 
         switch (memAccess) {
         case VIR_MEM_ACCESS_SHARED:
@@ -4647,11 +4647,10 @@ qemuBuildMemoryBackendStr(unsigned long long size,
             goto cleanup;
         }
 
-        virBufferAddLit(&buf, "memory-backend-ram");
+        virBufferAsprintf(&buf, "memory-backend-ram,id=%s%zu", aliasPrefix, id);
     }
 
-    virBufferAsprintf(&buf, ",size=%lluM,id=%s%zu", size / 1024,
-                      aliasPrefix, id);
+    virBufferAsprintf(&buf, ",size=%lluM", size / 1024);
 
     if (userNodeset) {
         if (!(nodemask = virBitmapFormat(userNodeset)))

tests/qemuxml2argvdata/qemuxml2argv-hugepages-pages.args

 LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
 /usr/bin/qemu -S -M pc -m 4096 -smp 4 \
--object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages1G/libvirt/qemu,\
-size=1024M,id=ram-node0,host-nodes=0-3,policy=bind \
+-object memory-backend-file,id=ram-node0,prealloc=yes,\
+mem-path=/dev/hugepages1G/libvirt/qemu,size=1024M,host-nodes=0-3,policy=bind \
 -numa node,nodeid=0,cpus=0,memdev=ram-node0 \
--object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages2M/libvirt/qemu,\
-size=1024M,id=ram-node1,host-nodes=0-3,policy=bind \
+-object memory-backend-file,id=ram-node1,prealloc=yes,\
+mem-path=/dev/hugepages2M/libvirt/qemu,size=1024M,host-nodes=0-3,policy=bind \
 -numa node,nodeid=1,cpus=1,memdev=ram-node1 \
--object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages1G/libvirt/qemu,\
-size=1024M,id=ram-node2,host-nodes=0-3,policy=bind \
+-object memory-backend-file,id=ram-node2,prealloc=yes,\
+mem-path=/dev/hugepages1G/libvirt/qemu,size=1024M,host-nodes=0-3,policy=bind \
 -numa node,nodeid=2,cpus=2,memdev=ram-node2 \
--object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages1G/libvirt/qemu,\
-size=1024M,id=ram-node3,host-nodes=3,policy=bind \
+-object memory-backend-file,id=ram-node3,prealloc=yes,\
+mem-path=/dev/hugepages1G/libvirt/qemu,size=1024M,host-nodes=3,policy=bind \
 -numa node,nodeid=3,cpus=3,memdev=ram-node3 \
 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -usb \
 -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none

tests/qemuxml2argvdata/qemuxml2argv-hugepages-pages2.args

 LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
 /usr/bin/qemu -S -M pc -m 1024 -smp 2 \
--object memory-backend-file,prealloc=yes,\
-mem-path=/dev/hugepages2M/libvirt/qemu,size=256M,id=ram-node0 \
+-object memory-backend-file,id=ram-node0,prealloc=yes,\
+mem-path=/dev/hugepages2M/libvirt/qemu,size=256M \
 -numa node,nodeid=0,cpus=0,memdev=ram-node0 \
--object memory-backend-file,prealloc=yes,\
-mem-path=/dev/hugepages2M/libvirt/qemu,size=768M,id=ram-node1 \
+-object memory-backend-file,id=ram-node1,prealloc=yes,\
+mem-path=/dev/hugepages2M/libvirt/qemu,size=768M \
 -numa node,nodeid=1,cpus=1,memdev=ram-node1 \
 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c \
 -usb -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none

tests/qemuxml2argvdata/qemuxml2argv-hugepages-pages3.args

 LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
 /usr/bin/qemu -S -M pc -m 1024 -smp 2 \
 -numa node,nodeid=0,cpus=0,mem=256 \
--object memory-backend-file,prealloc=yes,\
-mem-path=/dev/hugepages1G/libvirt/qemu,size=768M,id=ram-node1 \
+-object memory-backend-file,id=ram-node1,prealloc=yes,\
+mem-path=/dev/hugepages1G/libvirt/qemu,size=768M \
 -numa node,nodeid=1,cpus=1,memdev=ram-node1 \
 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -usb \
 -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none

tests/qemuxml2argvdata/qemuxml2argv-hugepages-shared.args

 LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
 /usr/bin/qemu -S -M pc -m 4096 -smp 4 \
--object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages1G/libvirt/qemu,\
-size=1024M,id=ram-node0,host-nodes=0-3,policy=bind \
+-object memory-backend-file,id=ram-node0,prealloc=yes,\
+mem-path=/dev/hugepages1G/libvirt/qemu,size=1024M,host-nodes=0-3,policy=bind \
 -numa node,nodeid=0,cpus=0,memdev=ram-node0 \
--object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages2M/libvirt/qemu,\
-share=on,size=1024M,id=ram-node1,host-nodes=0-3,policy=bind \
+-object memory-backend-file,id=ram-node1,prealloc=yes,\
+mem-path=/dev/hugepages2M/libvirt/qemu,share=on,size=1024M,host-nodes=0-3,\
+policy=bind \
 -numa node,nodeid=1,cpus=1,memdev=ram-node1 \
--object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages1G/libvirt/qemu,\
-share=off,size=1024M,id=ram-node2,host-nodes=0-3,policy=bind \
+-object memory-backend-file,id=ram-node2,prealloc=yes,\
+mem-path=/dev/hugepages1G/libvirt/qemu,share=off,size=1024M,host-nodes=0-3,\
+policy=bind \
 -numa node,nodeid=2,cpus=2,memdev=ram-node2 \
--object memory-backend-file,prealloc=yes,mem-path=/dev/hugepages1G/libvirt/qemu,\
-size=1024M,id=ram-node3,host-nodes=3,policy=bind \
+-object memory-backend-file,id=ram-node3,prealloc=yes,\
+mem-path=/dev/hugepages1G/libvirt/qemu,size=1024M,host-nodes=3,policy=bind \
 -numa node,nodeid=3,cpus=3,memdev=ram-node3 \
 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -usb \
 -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none

tests/qemuxml2argvdata/qemuxml2argv-numatune-memnode-no-memory.args

 LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
 /usr/bin/kvm -S -M pc -m 64 -smp 2 \
--object memory-backend-ram,size=32M,id=ram-node0,host-nodes=3,policy=preferred \
+-object memory-backend-ram,id=ram-node0,size=32M,host-nodes=3,policy=preferred \
 -numa node,nodeid=0,cpus=0,memdev=ram-node0 \
 -numa node,nodeid=1,cpus=1,mem=32 \
 -nographic -monitor unix:/tmp/test-monitor,server,nowait \

tests/qemuxml2argvdata/qemuxml2argv-numatune-memnode.args

 LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
 /usr/bin/kvm -S -M pc -m 24104 -smp 32 \
--object memory-backend-ram,size=20M,id=ram-node0,host-nodes=3,policy=preferred \
+-object memory-backend-ram,id=ram-node0,size=20M,host-nodes=3,policy=preferred \
 -numa node,nodeid=0,cpus=0,memdev=ram-node0 \
--object memory-backend-ram,size=645M,id=ram-node1,host-nodes=0-7,policy=bind \
+-object memory-backend-ram,id=ram-node1,size=645M,host-nodes=0-7,policy=bind \
 -numa node,nodeid=1,cpus=1-27,cpus=29,memdev=ram-node1 \
--object memory-backend-ram,size=23440M,id=ram-node2,\
+-object memory-backend-ram,id=ram-node2,size=23440M,\
 host-nodes=1-2,host-nodes=5,host-nodes=7,policy=bind \
 -numa node,nodeid=2,cpus=28,cpus=30-31,memdev=ram-node2 \
 -nographic -monitor unix:/tmp/test-monitor,server,nowait \