[libvirt] [PATCH 2/4] libxl: implement per NUMA node free memory reporting
By providing the implementation of nodeGetCellsFreeMemory for
the driver. This is all just a matter of properly formatting, in
a way that libvirt like, what Xen provides via libxl_get_numainfo().
[raistlin@Zhaman ~]$ sudo virsh --connect xen:/// freecell --all
0: 25004 KiB
1: 105848 KiB
--------------------
Total: 130852 KiB
Signed-off-by: Dario Faggioli <dario.faggioli(a)citrix.com>
---
src/libxl/libxl_driver.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c
index 9f52394..a3a9171 100644
--- a/src/libxl/libxl_driver.c
+++ b/src/libxl/libxl_driver.c
@@ -4098,6 +4098,51 @@ libxlNodeGetFreeMemory(virConnectPtr conn)
}
static int
+libxlNodeGetCellsFreeMemory(virConnectPtr conn,
+ unsigned long long *freeMems,
+ int startCell,
+ int maxCells)
+{
+ int n, lastCell, numCells;
+ int ret = -1, nr_nodes = 0;
+ libxl_numainfo *numa_info = NULL;
+ libxlDriverPrivatePtr driver = conn->privateData;
+
+ if (virNodeGetCellsFreeMemoryEnsureACL(conn) < 0)
+ return -1;
+
+ /* Early failure is probably worth just a warning */
+ numa_info = libxl_get_numainfo(driver->ctx, &nr_nodes);
+ if (numa_info == NULL || nr_nodes == 0) {
+ VIR_WARN("libxl_get_numainfo failed to retrieve NUMA data");
+ return 0;
+ }
+
+ /* Check/sanitize the cell range */
+ if (startCell > nr_nodes) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("start cell %d out of range (0-%d)"),
+ startCell, nr_nodes);
+ goto cleanup;
+ }
+ lastCell = startCell + maxCells - 1;
+ if (lastCell > nr_nodes)
+ lastCell = nr_nodes;
+
+ for (numCells = 0, n = startCell; n <= lastCell; n++) {
+ if (numa_info[n].size == LIBXL_NUMAINFO_INVALID_ENTRY)
+ freeMems[numCells++] = 0;
+ else
+ freeMems[numCells++] = numa_info[n].free;
+ }
+ ret = numCells;
+
+cleanup:
+ libxl_numainfo_list_free(numa_info, nr_nodes);
+ return ret;
+}
+
+static int
libxlConnectDomainEventRegister(virConnectPtr conn,
virConnectDomainEventCallback callback, void *opaque,
virFreeCallback freecb)
@@ -4683,6 +4728,7 @@ static virDriver libxlDriver = {
.domainSetSchedulerParameters = libxlDomainSetSchedulerParameters, /* 0.9.0 */
.domainSetSchedulerParametersFlags = libxlDomainSetSchedulerParametersFlags, /* 0.9.2
*/
.nodeGetFreeMemory = libxlNodeGetFreeMemory, /* 0.9.0 */
+ .nodeGetCellsFreeMemory = libxlNodeGetCellsFreeMemory, /* 1.1.1 */
.connectDomainEventRegister = libxlConnectDomainEventRegister, /* 0.9.0 */
.connectDomainEventDeregister = libxlConnectDomainEventDeregister, /* 0.9.0 */
.domainManagedSave = libxlDomainManagedSave, /* 0.9.2 */