memory: Increase guest memory to 4G

The previous guest memory setting was 2G, but the half memory test
would fail because 1G was not enough to maintain the normal operation
of the guest.

Signed-off-by: Hu Shuai <[email protected]>

Author: hs0210

libvirt/tests/cfg/virsh_cmd/domain/virsh_setmem.cfg renamed to libvirt/tests/cfg/memory/virsh_setmem.cfg

@@ -17,6 +17,7 @@
     # expected to fail on older libvirt.
     setmem_old_libvirt_fail = "no"
     take_regular_screendumps = no
+    vm_attrs = {'memory': 4, 'memory_unit': 'GiB', 'current_mem': 4, 'current_mem_unit': 'GiB'}
     variants:
         - valid_options:
             # These should not fail

libvirt/tests/src/virsh_cmd/domain/virsh_setmem.py renamed to libvirt/tests/src/memory/virsh_setmem.py

@@ -10,6 +10,9 @@
 from virttest import libvirt_version
 from virttest.utils_test import libvirt
 from virttest.libvirt_xml import vm_xml
+from virttest.staging import utils_memory
+
+from provider.memory import memory_base
 
 
 # Using as lower capital is not the best way to do, but this is just a
@@ -251,6 +254,21 @@ def print_debug_stats(original_inside_mem, original_outside_mem,
     vmxml = vm_xml.VMXML.new_from_inactive_dumpxml(vm_name)
     backup_xml = vmxml.copy()
 
+    vm_attrs = eval(params.get('vm_attrs'))
+    memory_size = vm_attrs['memory']
+    memory_unit = vm_attrs['memory_unit']
+    guest_memory = memory_base.convert_data_size(
+        str(memory_size) + memory_unit, dest_unit='KiB')
+    host_free_mem = utils_memory.freememtotal()
+    logging.debug("The allocation memory for guest is %sKiB,"
+                  " the total free memory of host is %sKiB.",
+                  guest_memory, host_free_mem)
+    if host_free_mem < guest_memory:
+        test.cancel("There is not enough memory for guest.")
+
+    vmxml.setup_attrs(**vm_attrs)
+    vmxml.sync()
+
     if with_packed and not libvirt_version.version_compare(6, 3, 0):
         test.cancel("The virtio packed attribute is not supported in"
                     " current libvirt version.")