[PATCH v4 3/3] qemu: add parser and formatter for 'restrictive' mode in numatune

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Reviewed-by: Daniel Henrique Barboza <danielhb413@xxxxxxxxx>
Signed-off-by: Luyao Zhong <luyao.zhong@xxxxxxxxx>
---
 include/libvirt/libvirt-domain.h              |  1 +
 src/conf/numa_conf.c                          |  9 ++++
 src/qemu/qemu_command.c                       |  6 ++-
 src/qemu/qemu_process.c                       | 27 ++++++++++++
 src/util/virnuma.c                            |  3 ++
 .../numatune-memnode-invalid-mode.err         |  1 +
 .../numatune-memnode-invalid-mode.xml         | 33 +++++++++++++++
 ...emnode-restrictive-mode.x86_64-latest.args | 40 ++++++++++++++++++
 .../numatune-memnode-restrictive-mode.xml     | 33 +++++++++++++++
 tests/qemuxml2argvtest.c                      |  2 +
 ...memnode-restrictive-mode.x86_64-latest.xml | 41 +++++++++++++++++++
 tests/qemuxml2xmltest.c                       |  1 +
 12 files changed, 196 insertions(+), 1 deletion(-)
 create mode 100644 tests/qemuxml2argvdata/numatune-memnode-invalid-mode.err
 create mode 100644 tests/qemuxml2argvdata/numatune-memnode-invalid-mode.xml
 create mode 100644 tests/qemuxml2argvdata/numatune-memnode-restrictive-mode.x86_64-latest.args
 create mode 100644 tests/qemuxml2argvdata/numatune-memnode-restrictive-mode.xml
 create mode 100644 tests/qemuxml2xmloutdata/numatune-memnode-restrictive-mode.x86_64-latest.xml

diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-domain.h
index 03c119fe26..e99bfb7654 100644
--- a/include/libvirt/libvirt-domain.h
+++ b/include/libvirt/libvirt-domain.h
@@ -1527,6 +1527,7 @@ typedef enum {
     VIR_DOMAIN_NUMATUNE_MEM_STRICT      = 0,
     VIR_DOMAIN_NUMATUNE_MEM_PREFERRED   = 1,
     VIR_DOMAIN_NUMATUNE_MEM_INTERLEAVE  = 2,
+    VIR_DOMAIN_NUMATUNE_MEM_RESTRICTIVE = 3,
 
 # ifdef VIR_ENUM_SENTINELS
     VIR_DOMAIN_NUMATUNE_MEM_LAST /* This constant is subject to change */
diff --git a/src/conf/numa_conf.c b/src/conf/numa_conf.c
index 64b93fd7d1..11093531b5 100644
--- a/src/conf/numa_conf.c
+++ b/src/conf/numa_conf.c
@@ -43,6 +43,7 @@ VIR_ENUM_IMPL(virDomainNumatuneMemMode,
               "strict",
               "preferred",
               "interleave",
+              "restrictive",
 );
 
 VIR_ENUM_IMPL(virDomainNumatunePlacement,
@@ -234,6 +235,14 @@ virDomainNumatuneNodeParseXML(virDomainNumaPtr numa,
                                _("Invalid mode attribute in memnode element"));
                 goto cleanup;
             }
+
+            if (numa->memory.mode == VIR_DOMAIN_NUMATUNE_MEM_RESTRICTIVE &&
+                mode != VIR_DOMAIN_NUMATUNE_MEM_RESTRICTIVE) {
+                virReportError(VIR_ERR_XML_ERROR, "%s",
+                               _("'restrictive' mode is required in memnode element "
+                                 "when mode is 'restrictive' in memory element"));
+                goto cleanup;
+            }
             VIR_FREE(tmp);
             mem_node->mode = mode;
         }
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 5717f7b98d..8e4cf5ea46 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -175,6 +175,7 @@ VIR_ENUM_IMPL(qemuNumaPolicy,
               "bind",
               "preferred",
               "interleave",
+              "restricted",
 );
 
 VIR_ENUM_DECL(qemuAudioDriver);
@@ -3239,7 +3240,10 @@ qemuBuildMemoryBackendProps(virJSONValuePtr *backendProps,
             return -1;
     }
 
-    if (nodemask) {
+    /* If mode is "restrictive", we should only use cgroups setting allowed memory
+     * nodes, and skip passing the host-nodes and policy parameters to QEMU command
+     * line which means we will use system default memory policy. */
+    if (nodemask && mode != VIR_DOMAIN_NUMATUNE_MEM_RESTRICTIVE) {
         if (!virNumaNodesetIsAvailable(nodemask))
             return -1;
         if (virJSONValueObjectAdd(props,
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index fedd1f56b1..8f59609192 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -2692,6 +2692,7 @@ qemuProcessSetupPid(virDomainObjPtr vm,
     g_autoptr(virBitmap) hostcpumap = NULL;
     g_autofree char *mem_mask = NULL;
     int ret = -1;
+    size_t i;
 
     if ((period || quota) &&
         !virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
@@ -2732,6 +2733,32 @@ qemuProcessSetupPid(virDomainObjPtr vm,
                                                 &mem_mask, -1) < 0)
             goto cleanup;
 
+        /* For vCPU threads, mem_mask is different among cells and mem_mask
+         * is used to set cgroups cpuset.mems for vcpu threads. If we specify
+         * 'restrictive' mode, that means we will set system default memory
+         * policy and only use cgroups to restrict allowed memory nodes. */
+        if (nameval == VIR_CGROUP_THREAD_VCPU) {
+            virDomainNumaPtr numatune = vm->def->numa;
+            virBitmapPtr numanode_cpumask = NULL;
+            for (i = 0; i < virDomainNumaGetNodeCount(numatune); i++) {
+                numanode_cpumask = virDomainNumaGetNodeCpumask(numatune, i);
+                /* 'i' indicates the cell id, if the vCPU id is in this cell
+                 * and mode is 'restrictive', we need get the corresponding
+                 * nodeset. */
+                if (virBitmapIsBitSet(numanode_cpumask, id) &&
+                    virDomainNumatuneGetMode(numatune, i, &mem_mode) == 0 &&
+                    mem_mode == VIR_DOMAIN_NUMATUNE_MEM_RESTRICTIVE) {
+                    if (virDomainNumatuneMaybeFormatNodeset(numatune,
+                                                            priv->autoNodeset,
+                                                            &mem_mask, i) < 0) {
+                        goto cleanup;
+                    } else {
+                        break;
+                    }
+                }
+            }
+        }
+
         if (virCgroupNewThread(priv->cgroup, nameval, id, true, &cgroup) < 0)
             goto cleanup;
 
diff --git a/src/util/virnuma.c b/src/util/virnuma.c
index 6c194b54d1..34db746d28 100644
--- a/src/util/virnuma.c
+++ b/src/util/virnuma.c
@@ -152,6 +152,9 @@ virNumaSetupMemoryPolicy(virDomainNumatuneMemMode mode,
         numa_set_interleave_mask(&mask);
         break;
 
+    case VIR_DOMAIN_NUMATUNE_MEM_RESTRICTIVE:
+        break;
+
     case VIR_DOMAIN_NUMATUNE_MEM_LAST:
         break;
     }
diff --git a/tests/qemuxml2argvdata/numatune-memnode-invalid-mode.err b/tests/qemuxml2argvdata/numatune-memnode-invalid-mode.err
new file mode 100644
index 0000000000..180e64d1d8
--- /dev/null
+++ b/tests/qemuxml2argvdata/numatune-memnode-invalid-mode.err
@@ -0,0 +1 @@
+XML error: 'restrictive' mode is required in memnode element when mode is 'restrictive' in memory element
diff --git a/tests/qemuxml2argvdata/numatune-memnode-invalid-mode.xml b/tests/qemuxml2argvdata/numatune-memnode-invalid-mode.xml
new file mode 100644
index 0000000000..a7c18d4d50
--- /dev/null
+++ b/tests/qemuxml2argvdata/numatune-memnode-invalid-mode.xml
@@ -0,0 +1,33 @@
+<domain type='qemu'>
+  <name>QEMUGuest</name>
+  <uuid>9f4b6512-e73a-4a25-93e8-5307802821ce</uuid>
+  <memory unit='KiB'>24682468</memory>
+  <currentMemory unit='KiB'>24682468</currentMemory>
+  <vcpu placement='static'>32</vcpu>
+  <numatune>
+    <memory mode='restrictive' nodeset='0-7'/>
+    <memnode cellid='0' mode='restrictive' nodeset='3'/>
+    <memnode cellid='2' mode='strict' nodeset='1-2,5-7,^6'/>
+  </numatune>
+  <os>
+    <type arch='x86_64' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <cpu>
+    <numa>
+      <cell id='0' cpus='0' memory='20002' unit='KiB'/>
+      <cell id='1' cpus='1-27,29' memory='660066' unit='KiB'/>
+      <cell id='2' cpus='28,30-31' memory='24002400' unit='KiB'/>
+    </numa>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2argvdata/numatune-memnode-restrictive-mode.x86_64-latest.args b/tests/qemuxml2argvdata/numatune-memnode-restrictive-mode.x86_64-latest.args
new file mode 100644
index 0000000000..b37cb93bba
--- /dev/null
+++ b/tests/qemuxml2argvdata/numatune-memnode-restrictive-mode.x86_64-latest.args
@@ -0,0 +1,40 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-QEMUGuest \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-QEMUGuest/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-QEMUGuest/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=QEMUGuest,debug-threads=on \
+-S \
+-object secret,id=masterKey0,format=raw,\
+file=/tmp/lib/domain--1-QEMUGuest/master-key.aes \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-cpu qemu64 \
+-m 24105 \
+-overcommit mem-lock=off \
+-smp 32,sockets=32,cores=1,threads=1 \
+-object memory-backend-ram,id=ram-node0,size=20971520 \
+-numa node,nodeid=0,cpus=0,memdev=ram-node0 \
+-object memory-backend-ram,id=ram-node1,size=676331520 \
+-numa node,nodeid=1,cpus=1-27,cpus=29,memdev=ram-node1 \
+-object memory-backend-ram,id=ram-node2,size=24578621440 \
+-numa node,nodeid=2,cpus=28,cpus=30-31,memdev=ram-node2 \
+-uuid 9f4b6512-e73a-4a25-93e8-5307802821ce \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-boot strict=on \
+-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
+-audiodev id=audio1,driver=none \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
+resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxml2argvdata/numatune-memnode-restrictive-mode.xml b/tests/qemuxml2argvdata/numatune-memnode-restrictive-mode.xml
new file mode 100644
index 0000000000..72949b0657
--- /dev/null
+++ b/tests/qemuxml2argvdata/numatune-memnode-restrictive-mode.xml
@@ -0,0 +1,33 @@
+<domain type='qemu'>
+  <name>QEMUGuest</name>
+  <uuid>9f4b6512-e73a-4a25-93e8-5307802821ce</uuid>
+  <memory unit='KiB'>24682468</memory>
+  <currentMemory unit='KiB'>24682468</currentMemory>
+  <vcpu placement='static'>32</vcpu>
+  <numatune>
+    <memnode cellid='0' mode='restrictive' nodeset='3'/>
+    <memory mode='restrictive' nodeset='0-7'/>
+    <memnode cellid='2' mode='restrictive' nodeset='1-2,5-7,^6'/>
+  </numatune>
+  <os>
+    <type arch='x86_64' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <cpu>
+    <numa>
+      <cell id='0' cpus='0' memory='20002' unit='KiB'/>
+      <cell id='1' cpus='1-27,29' memory='660066' unit='KiB'/>
+      <cell id='2' cpus='28,30-31' memory='24002400' unit='KiB'/>
+    </numa>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 44c2a316b0..5a30f225d7 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -2115,6 +2115,8 @@ mymain(void)
             QEMU_CAPS_NUMA,
             QEMU_CAPS_OBJECT_MEMORY_RAM);
     DO_TEST_PARSE_ERROR("numatune-memnode", NONE);
+    DO_TEST_CAPS_LATEST("numatune-memnode-restrictive-mode");
+    DO_TEST_PARSE_ERROR("numatune-memnode-invalid-mode", NONE);
 
     DO_TEST("numatune-memnode-no-memory",
             QEMU_CAPS_NUMA,
diff --git a/tests/qemuxml2xmloutdata/numatune-memnode-restrictive-mode.x86_64-latest.xml b/tests/qemuxml2xmloutdata/numatune-memnode-restrictive-mode.x86_64-latest.xml
new file mode 100644
index 0000000000..012c526460
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/numatune-memnode-restrictive-mode.x86_64-latest.xml
@@ -0,0 +1,41 @@
+<domain type='qemu'>
+  <name>QEMUGuest</name>
+  <uuid>9f4b6512-e73a-4a25-93e8-5307802821ce</uuid>
+  <memory unit='KiB'>24682468</memory>
+  <currentMemory unit='KiB'>24682468</currentMemory>
+  <vcpu placement='static'>32</vcpu>
+  <numatune>
+    <memory mode='restrictive' nodeset='0-7'/>
+    <memnode cellid='0' mode='restrictive' nodeset='3'/>
+    <memnode cellid='2' mode='restrictive' nodeset='1-2,5,7'/>
+  </numatune>
+  <os>
+    <type arch='x86_64' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <cpu mode='custom' match='exact' check='none'>
+    <model fallback='forbid'>qemu64</model>
+    <numa>
+      <cell id='0' cpus='0' memory='20002' unit='KiB'/>
+      <cell id='1' cpus='1-27,29' memory='660066' unit='KiB'/>
+      <cell id='2' cpus='28,30-31' memory='24002400' unit='KiB'/>
+    </numa>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' index='0' model='piix3-uhci'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <audio id='1' type='none'/>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 4e7cce21c6..2b22da1ebe 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -1107,6 +1107,7 @@ mymain(void)
     DO_TEST("numatune-distances", QEMU_CAPS_NUMA, QEMU_CAPS_NUMA_DIST);
     DO_TEST("numatune-no-vcpu", QEMU_CAPS_NUMA);
     DO_TEST("numatune-hmat", QEMU_CAPS_NUMA_HMAT, QEMU_CAPS_OBJECT_MEMORY_RAM);
+    DO_TEST_CAPS_LATEST("numatune-memnode-restrictive-mode");
 
     DO_TEST("bios-nvram", NONE);
     DO_TEST("bios-nvram-os-interleave", NONE);
-- 
2.25.4




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