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Implement domainSetMemoryParamters for QEmu

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Driver interface for setting memory hard_limit, soft_limit and swap
hard_limit based on cgroup support
This commit is contained in:
Nikunj A. Dadhania 2010-10-12 17:24:54 +02:00 committed by Daniel Veillard
parent 5f481e4df1
commit 71d0b4275d
1 changed files with 104 additions and 1 deletions
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105
src/qemu/qemu_driver.c
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@ -86,6 +86,8 @@
#define QEMU_VNC_PORT_MIN 5900
#define QEMU_VNC_PORT_MAX 65535
#define QEMU_NB_MEM_PARAM 3
#define QEMU_NAMESPACE_HREF "http://libvirt.org/schemas/domain/qemu/1.0"
/* Only 1 job is allowed at any time
@ -9365,6 +9367,107 @@ cleanup:
return ret;
}
static int qemuDomainSetMemoryParameters(virDomainPtr dom,
virMemoryParameterPtr params,
int nparams,
unsigned int flags ATTRIBUTE_UNUSED)
{
struct qemud_driver *driver = dom->conn->privateData;
int i;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
int ret = -1;
qemuDriverLock(driver);
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_MEMORY)) {
qemuReportError(VIR_ERR_NO_SUPPORT,
__FUNCTION__);
goto cleanup;
}
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"), vm->def->name);
goto cleanup;
}
ret = 0;
for (i = 0; i < nparams; i++) {
virMemoryParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_MEMORY_HARD_LIMIT)) {
int rc;
if (param->type != VIR_DOMAIN_MEMORY_PARAM_ULLONG) {
qemuReportError(VIR_ERR_INVALID_ARG, "%s",
_("invalid type for memory hard_limit tunable, expected a 'ullong'"));
ret = -1;
continue;
}
rc = virCgroupSetMemoryHardLimit(group, params[i].value.ul);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set memory hard_limit tunable"));
ret = -1;
}
} else if (STREQ(param->field, VIR_DOMAIN_MEMORY_SOFT_LIMIT)) {
int rc;
if (param->type != VIR_DOMAIN_MEMORY_PARAM_ULLONG) {
qemuReportError(VIR_ERR_INVALID_ARG, "%s",
_("invalid type for memory soft_limit tunable, expected a 'ullong'"));
ret = -1;
continue;
}
rc = virCgroupSetMemorySoftLimit(group, params[i].value.ul);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set memory soft_limit tunable"));
ret = -1;
}
} else if (STREQ(param->field, VIR_DOMAIN_SWAP_HARD_LIMIT)) {
int rc;
if (param->type != VIR_DOMAIN_MEMORY_PARAM_ULLONG) {
qemuReportError(VIR_ERR_INVALID_ARG, "%s",
_("invalid type for swap_hard_limit tunable, expected a 'ullong'"));
ret = -1;
continue;
}
rc = virCgroupSetSwapHardLimit(group, params[i].value.ul);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set swap_hard_limit tunable"));
ret = -1;
}
} else if (STREQ(param->field, VIR_DOMAIN_MEMORY_MIN_GUARANTEE)) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("Memory tunable `%s' not implemented"), param->field);
ret = -1;
} else {
qemuReportError(VIR_ERR_INVALID_ARG,
_("Parameter `%s' not supported"), param->field);
ret = -1;
}
}
cleanup:
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int qemuSetSchedulerParameters(virDomainPtr dom,
virSchedParameterPtr params,
int nparams)
@ -12710,7 +12813,7 @@ static virDriver qemuDriver = {
qemuDomainRevertToSnapshot, /* domainRevertToSnapshot */
qemuDomainSnapshotDelete, /* domainSnapshotDelete */
qemuDomainMonitorCommand, /* qemuDomainMonitorCommand */
NULL, /* domainSetMemoryParameters */
qemuDomainSetMemoryParameters, /* domainSetMemoryParameters */
NULL, /* domainGetMemoryParameters */
};