[libvirt] [PATCH 2/3] docs, conf, schema: add support for shared memory mapping
Martin Kletzander
mkletzan at redhat.com
Mon Sep 8 11:40:39 UTC 2014
Signed-off-by: Martin Kletzander <mkletzan at redhat.com>
---
docs/formatdomain.html.in | 7 +++-
docs/schemas/domaincommon.rng | 5 +++
src/conf/cpu_conf.c | 25 +++++++++++-
src/conf/cpu_conf.h | 7 ++--
.../qemuxml2argv-cpu-numa-memshared.xml | 28 ++++++++++++++
.../qemuxml2argv-hugepages-shared.xml | 45 ++++++++++++++++++++++
tests/qemuxml2xmltest.c | 2 +
7 files changed, 113 insertions(+), 6 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-cpu-numa-memshared.xml
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-hugepages-shared.xml
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 94236dd..b284d6e 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1105,7 +1105,7 @@
...
<numa>
<cell id='0' cpus='0-3' memory='512000'/>
- <cell id='1' cpus='4-7' memory='512000'/>
+ <cell id='1' cpus='4-7' memory='512000' memShared='on'/>
</numa>
...
</cpu>
@@ -1122,6 +1122,11 @@
assigned <code>id</code>s in the increasing order starting from
0. Mixing cells with and without the <code>id</code> attribute
is not recommended as it may result in unwanted behaviour.
+
+ <span class='since'>Since 1.2.9</span> the optional attribute
+ <code>memShared</code> can control whether the memory is to be
+ mapped as shared or not (values "on"/"off"). This is valid only
+ for hugepages-backed memory.
</p>
<p>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 25ff386..89eb953 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -3980,6 +3980,11 @@
<attribute name="memory">
<ref name="memoryKB"/>
</attribute>
+ <optional>
+ <attribute name="memShared">
+ <ref name="virSwitch"/>
+ </attribute>
+ </optional>
</element>
</define>
diff --git a/src/conf/cpu_conf.c b/src/conf/cpu_conf.c
index 5003cf1..ab31f8d 100644
--- a/src/conf/cpu_conf.c
+++ b/src/conf/cpu_conf.c
@@ -435,7 +435,7 @@ virCPUDefParseXML(xmlNodePtr node,
def->ncells = n;
for (i = 0; i < n; i++) {
- char *cpus, *memory;
+ char *cpus, *memory, *memSharedStr;
int ret, ncpus = 0;
unsigned int cur_cell;
char *tmp = NULL;
@@ -491,7 +491,7 @@ virCPUDefParseXML(xmlNodePtr node,
goto error;
}
- ret = virStrToLong_ui(memory, NULL, 10, &def->cells[cur_cell].mem);
+ ret = virStrToLong_ui(memory, NULL, 10, &def->cells[cur_cell].mem);
if (ret == -1) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("Invalid 'memory' attribute in NUMA cell"));
@@ -499,6 +499,22 @@ virCPUDefParseXML(xmlNodePtr node,
goto error;
}
VIR_FREE(memory);
+
+ memSharedStr = virXMLPropString(nodes[i], "memShared");
+ if (memSharedStr) {
+ def->cells[cur_cell].memShared =
+ virTristateSwitchTypeFromString(memSharedStr);
+
+ if (def->cells[cur_cell].memShared <= 0) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("Invalid 'memShared' attribute "
+ "value '%s'"),
+ memSharedStr);
+ VIR_FREE(memSharedStr);
+ goto cleanup;
+ }
+ VIR_FREE(memSharedStr);
+ }
}
}
@@ -674,10 +690,15 @@ virCPUDefFormatBuf(virBufferPtr buf,
virBufferAddLit(buf, "<numa>\n");
virBufferAdjustIndent(buf, 2);
for (i = 0; i < def->ncells; i++) {
+ virTristateSwitch memShared = def->cells[i].memShared;
+
virBufferAddLit(buf, "<cell");
virBufferAsprintf(buf, " id='%zu'", i);
virBufferAsprintf(buf, " cpus='%s'", def->cells[i].cpustr);
virBufferAsprintf(buf, " memory='%d'", def->cells[i].mem);
+ if (memShared)
+ virBufferAsprintf(buf, " memShared='%s'",
+ virTristateSwitchTypeToString(memShared));
virBufferAddLit(buf, "/>\n");
}
virBufferAdjustIndent(buf, -2);
diff --git a/src/conf/cpu_conf.h b/src/conf/cpu_conf.h
index 2d538db..3083f45 100644
--- a/src/conf/cpu_conf.h
+++ b/src/conf/cpu_conf.h
@@ -93,9 +93,10 @@ struct _virCPUFeatureDef {
typedef struct _virCellDef virCellDef;
typedef virCellDef *virCellDefPtr;
struct _virCellDef {
- virBitmapPtr cpumask; /* CPUs that are part of this node */
- char *cpustr; /* CPUs stored in string form for dumpxml */
- unsigned int mem; /* Node memory in kB */
+ virBitmapPtr cpumask; /* CPUs that are part of this node */
+ char *cpustr; /* CPUs stored in string form for dumpxml */
+ unsigned int mem; /* Node memory in kB */
+ virTristateSwitch memShared;
};
typedef struct _virCPUDef virCPUDef;
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa-memshared.xml b/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa-memshared.xml
new file mode 100644
index 0000000..63d94fa
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-cpu-numa-memshared.xml
@@ -0,0 +1,28 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>16</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>hvm</type>
+ <boot dev='network'/>
+ </os>
+ <cpu>
+ <topology sockets='2' cores='4' threads='2'/>
+ <numa>
+ <cell id='0' cpus='0-7' memory='109550' memShared='on'/>
+ <cell id='1' cpus='8-15' memory='109550' memShared='off'/>
+ </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</emulator>
+ <controller type='usb' index='0'/>
+ <controller type='pci' index='0' model='pci-root'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-hugepages-shared.xml b/tests/qemuxml2argvdata/qemuxml2argv-hugepages-shared.xml
new file mode 100644
index 0000000..f5226f7
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-hugepages-shared.xml
@@ -0,0 +1,45 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>4194304</memory>
+ <currentMemory unit='KiB'>4194304</currentMemory>
+ <memoryBacking>
+ <hugepages>
+ <page size='2048' unit='KiB' nodeset='1'/>
+ <page size='1048576' unit='KiB' nodeset='0,2-3'/>
+ </hugepages>
+ </memoryBacking>
+ <vcpu placement='static'>4</vcpu>
+ <numatune>
+ <memory mode='strict' nodeset='0-3'/>
+ <memnode cellid='3' mode='strict' nodeset='3'/>
+ </numatune>
+ <os>
+ <type arch='i686' machine='pc'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <cpu>
+ <numa>
+ <cell id='0' cpus='0' memory='1048576'/>
+ <cell id='1' cpus='1' memory='1048576' memShared='on'/>
+ <cell id='2' cpus='2' memory='1048576' memShared='off'/>
+ <cell id='3' cpus='3' memory='1048576'/>
+ </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</emulator>
+ <disk type='block' device='disk'>
+ <source dev='/dev/HostVG/QEMUGuest1'/>
+ <target dev='hda' bus='ide'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+ <controller type='usb' index='0'/>
+ <controller type='ide' index='0'/>
+ <controller type='pci' index='0' model='pci-root'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index 03c05da..ea0015a 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -205,6 +205,7 @@ mymain(void)
DO_TEST("hugepages-pages");
DO_TEST("hugepages-pages2");
DO_TEST("hugepages-pages3");
+ DO_TEST("hugepages-shared");
DO_TEST("nosharepages");
DO_TEST("disk-aio");
DO_TEST("disk-cdrom");
@@ -391,6 +392,7 @@ mymain(void)
DO_TEST_DIFFERENT("cpu-numa1");
DO_TEST_DIFFERENT("cpu-numa2");
DO_TEST("cpu-numa-disjoint");
+ DO_TEST("cpu-numa-memshared");
DO_TEST_DIFFERENT("numatune-auto-prefer");
DO_TEST_DIFFERENT("numatune-memnode");
--
2.1.0
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