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libxl: implement per NUMA node free memory reporting

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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@citrix.com>
This commit is contained in:
Dario Faggioli 2013-06-28 16:32:52 +02:00 committed by Jim Fehlig
parent d79c9273b0
commit 4b9eec50fe
1 changed files with 46 additions and 0 deletions
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46
src/libxl/libxl_driver.c
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@ -4097,6 +4097,51 @@ libxlNodeGetFreeMemory(virConnectPtr conn)
return phy_info.free_pages * ver_info->pagesize;
}
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,
@ -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 */