2:32 a.m.
If you apply the patchset on your qemu
[RESEND PATCH v1 00/13] QEmu memory hot unplug support.
https://lists.nongnu.org/archive/html/qemu-devel/2015-01/msg00583.html,
qemu can support memory hot-unplug.
So this patchset will make libvirt support hot-unplug memory device for qemu
driver.
This series is based on the following patchset
[RFC PATCH 00/11] qemu: add support to hotplug memory device.
https://www.redhat.com/archives/libvir-list/2015-January/msg00728.html
Zhu Guihua (3):
qemu_monitor: introduce qemuMonitorDelMemoryBackend
qemu: introduce qemuDomainRemoveDimmDevice
qemu: implement dimm device hot-unplug on live level
src/qemu/qemu_driver.c | 2 ++
src/qemu/qemu_hotplug.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_hotplug.h | 3 ++
src/qemu/qemu_monitor.c | 20 +++++++++++
src/qemu/qemu_monitor.h | 2 ++
5 files changed, 122 insertions(+)
--
1.9.3
2:32 a.m.
New subject: [libvirt] [RFC PATCH 1/3] qemu_monitor: introduce qemuMonitorDelMemoryBackend
The function being introduced is responsibel for excuting
'object_del' command to hot remove memory backend.
Signed-off-by: Zhu Guihua <zhugh.fnst(a)cn.fujitsu.com>
---
src/qemu/qemu_monitor.c | 20 ++++++++++++++++++++
src/qemu/qemu_monitor.h | 2 ++
2 files changed, 22 insertions(+)
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 1db8ad0..c94a8d0 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4219,6 +4219,26 @@ int qemuMonitorAddMemoryBackend(qemuMonitorPtr mon,
return -1;
}
+int qemuMonitorDelMemoryBackend(qemuMonitorPtr mon,
+ const char *objID)
+{
+ VIR_DEBUG("mon=%p objID=%s", mon, objID);
+
+ if (!mon) {
+ virReportError(VIR_ERR_INVALID_ARG, "%s",
+ _("monitor must not be NULL"));
+ return -1;
+ }
+
+ if (!mon->json) {
+ virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
+ _("JSON monitor is required"));
+ return -1;
+ }
+
+ return qemuMonitorDelObject(mon, objID);
+}
+
int qemuMonitorAttachCharDev(qemuMonitorPtr mon,
const char *chrID,
virDomainChrSourceDefPtr chr)
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 9a69611..7f02627 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -866,6 +866,8 @@ int qemuMonitorGetTPMTypes(qemuMonitorPtr mon,
int qemuMonitorAddMemoryBackend(qemuMonitorPtr mon,
const char *objID,
virDomainDimmDefPtr dimm);
+int qemuMonitorDelMemoryBackend(qemuMonitorPtr mon,
+ const char *objID);
int qemuMonitorAttachCharDev(qemuMonitorPtr mon,
const char *chrID,
--
1.9.3
2:32 a.m.
New subject: [libvirt] [RFC PATCH 2/3] qemu: introduce qemuDomainRemoveDimmDevice
This func being introduced is responsible for deleting memory backend
and removing dimm from VM def.
Signed-off-by: Zhu Guihua <zhugh.fnst(a)cn.fujitsu.com>
---
src/qemu/qemu_hotplug.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index b7ca41e..8a0594f 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2931,6 +2931,44 @@ qemuDomainRemoveChrDevice(virQEMUDriverPtr driver,
}
+static int
+qemuDomainRemoveDimmDevice(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
+ virDomainDimmDefPtr dimm)
+{
+ virObjectEventPtr event;
+ char *objAlias = NULL;
+ qemuDomainObjPrivatePtr priv = vm->privateData;
+ int ret = -1;
+
+ VIR_DEBUG("Removing dimm device %s from domain %p %s",
+ dimm->info.alias, vm, vm->def->name);
+
+ if (virAsprintf(&objAlias, "obj%s", dimm->info.alias) < 0)
+ goto cleanup;
+
+ qemuDomainObjEnterMonitor(driver, vm);
+ if (qemuMonitorDelMemoryBackend(priv->mon, objAlias) < 0) {
+ qemuDomainObjExitMonitor(driver, vm);
+ goto cleanup;
+ }
+ qemuDomainObjExitMonitor(driver, vm);
+
+ event = virDomainEventDeviceRemovedNewFromObj(vm, dimm->info.alias);
+ if (event)
+ qemuDomainEventQueue(driver, event);
+
+ virDomainDimmRemove(vm->def, dimm);
+ virDomainDimmDefFree(dimm);
+
+ ret = 0;
+
+ cleanup:
+ VIR_FREE(objAlias);
+ return ret;
+}
+
+
int
qemuDomainRemoveDevice(virQEMUDriverPtr driver,
virDomainObjPtr vm,
@@ -2956,6 +2994,9 @@ qemuDomainRemoveDevice(virQEMUDriverPtr driver,
break;
case VIR_DOMAIN_DEVICE_DIMM:
+ qemuDomainRemoveDimmDevice(driver, vm, dev->data.dimm);
+ break;
+
case VIR_DOMAIN_DEVICE_NONE:
case VIR_DOMAIN_DEVICE_LEASE:
case VIR_DOMAIN_DEVICE_FS:
--
1.9.3
2:32 a.m.
New subject: [libvirt] [RFC PATCH 3/3] qemu: implement dimm device hot-unplug on live level
Signed-off-by: Zhu Guihua <zhugh.fnst(a)cn.fujitsu.com>
---
src/qemu/qemu_driver.c | 2 ++
src/qemu/qemu_hotplug.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_hotplug.h | 3 +++
3 files changed, 59 insertions(+)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 76ff7b5..61a4ead 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -7074,6 +7074,8 @@ qemuDomainDetachDeviceLive(virDomainObjPtr vm,
ret = qemuDomainDetachChrDevice(driver, vm, dev->data.chr);
break;
case VIR_DOMAIN_DEVICE_DIMM:
+ ret = qemuDomainDetachDimmDevice(driver, vm, dev->data.dimm);
+ break;
case VIR_DOMAIN_DEVICE_FS:
case VIR_DOMAIN_DEVICE_INPUT:
case VIR_DOMAIN_DEVICE_SOUND:
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 8a0594f..4895f95 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -3897,3 +3897,57 @@ int qemuDomainDetachChrDevice(virQEMUDriverPtr driver,
VIR_FREE(devstr);
return ret;
}
+
+int qemuDomainDetachDimmDevice(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
+ virDomainDimmDefPtr dimm)
+{
+ int ret = -1;
+ qemuDomainObjPrivatePtr priv = vm->privateData;
+ virDomainDefPtr vmdef = vm->def;
+ virDomainDimmDefPtr tmpDimm;
+ int rc;
+
+ if (!(tmpDimm = virDomainDimmFind(vmdef, dimm))) {
+ virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+ _("device not present in domain configration"));
+ return ret;
+ }
+
+ if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE)) {
+ virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+ _("qemu does not support -device"));
+ return ret;
+ }
+
+ if (!tmpDimm->info.alias) {
+ virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+ _("detaching dimm device without alias name is not
suported"));
+ return ret;
+ }
+
+ qemuDomainMarkDeviceForRemoval(vm, &tmpDimm->info);
+
+ qemuDomainObjEnterMonitor(driver, vm);
+ if (qemuMonitorDelDevice(priv->mon, tmpDimm->info.alias) < 0) {
+ qemuDomainObjExitMonitor(driver, vm);
+ goto cleanup;
+ }
+ qemuDomainObjExitMonitor(driver, vm);
+
+ virDomainAuditMemory(vm, vm->def->mem.cur_balloon,
+ vm->def->mem.cur_balloon - tmpDimm->backend.size,
+ "update", true);
+
+ ignore_value(virBitmapClearBit(vm->def->mem.dimm_slot_map, tmpDimm->slot));
+
+ rc = qemuDomainWaitForDeviceRemoval(vm);
+ if (rc == 0 || rc == 1)
+ ret = qemuDomainRemoveDimmDevice(driver, vm, tmpDimm);
+ else
+ goto cleanup;
+
+ cleanup:
+ qemuDomainResetDeviceRemoval(vm);
+ return ret;
+}
diff --git a/src/qemu/qemu_hotplug.h b/src/qemu/qemu_hotplug.h
index 1e9f7b3..f47a849 100644
--- a/src/qemu/qemu_hotplug.h
+++ b/src/qemu/qemu_hotplug.h
@@ -98,6 +98,9 @@ int qemuDomainAttachChrDevice(virQEMUDriverPtr driver,
int qemuDomainDetachChrDevice(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainChrDefPtr chr);
+int qemuDomainDetachDimmDevice(virQEMUDriverPtr driver,
+ virDomainObjPtr vm,
+ virDomainDimmDefPtr dimm);
int
--
1.9.3
3:52 a.m.
On Wed, Jan 21, 2015 at 16:32:05 +0800, Zhu Guihua wrote:
If you apply the patchset on your qemu
[RESEND PATCH v1 00/13] QEmu memory hot unplug support.
https://lists.nongnu.org/archive/html/qemu-devel/2015-01/msg00583.html,
qemu can support memory hot-unplug.
So this patchset will make libvirt support hot-unplug memory device for qemu
driver.
This series is based on the following patchset
[RFC PATCH 00/11] qemu: add support to hotplug memory device.
https://www.redhat.com/archives/libvir-list/2015-January/msg00728.html
As with the hotplug series. I'm already working on incorporating this in
a better way, thus I won't review this series in detail nor merge it.
Peter
3594
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3594
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4 comments
2 participants
participants (2)
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Peter Krempa -
Zhu Guihua