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qemu: Fix balloon size handling with memory hot(un)plug

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Since libvirt doesn't call to update the new balloon size in qemu add
code that will handle tweaking of the size of the current balloon
statistic until qemu reports the new size using the event.
This commit is contained in:
Peter Krempa 2015-04-30 18:03:41 +02:00
parent de03b1ddde
commit 2f37362e44
2 changed files with 13 additions and 0 deletions
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3
src/qemu/qemu_driver.c
View File

@ -8373,6 +8373,9 @@ qemuDomainAttachDeviceConfig(virQEMUCapsPtr qemuCaps,
return -1;
}
if (vmdef->mem.cur_balloon == virDomainDefGetMemoryActual(vmdef))
vmdef->mem.cur_balloon += dev->data.memory->size;
if (virDomainMemoryInsert(vmdef, dev->data.memory) < 0)
return -1;
dev->data.memory = NULL;

10
src/qemu/qemu_hotplug.c
View File

@ -1726,6 +1726,7 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
const char *backendType;
virJSONValuePtr props = NULL;
virObjectEventPtr event;
bool fix_balloon = false;
int id;
int ret = -1;
@ -1741,6 +1742,9 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
if (virAsprintf(&objalias, "mem%s", mem->info.alias) < 0)
goto cleanup;
if (vm->def->mem.cur_balloon == virDomainDefGetMemoryActual(vm->def))
fix_balloon = true;
if (!(devstr = qemuBuildMemoryDeviceStr(mem, vm->def, priv->qemuCaps)))
goto cleanup;
@ -1779,6 +1783,10 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
if (event)
qemuDomainEventQueue(driver, event);
/* fix the balloon size if it was set to maximum */
if (fix_balloon)
vm->def->mem.cur_balloon += mem->size;
/* mem is consumed by vm->def */
mem = NULL;
@ -2896,6 +2904,8 @@ qemuDomainRemoveMemoryDevice(virQEMUDriverPtr driver,
if (qemuDomainObjExitMonitor(driver, vm) < 0 || rc < 0)
goto error;
vm->def->mem.cur_balloon -= mem->size;
if ((idx = virDomainMemoryFindByDef(vm->def, mem)) >= 0)
virDomainMemoryRemove(vm->def, idx);