Re: [libvirt] [PATCH 4/5] qemu: Support setting NUMA distances

Since we already have such support for libxl all we need is qemu driver adjustment. And a test case. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/qemu/qemu_command.c | 36 +++++++++++- .../qemuxml2argv-numatune-distances.args | 63 +++++++++++++++++++++ .../qemuxml2argv-numatune-distances.xml | 65 ++++++++++++++++++++++ tests/qemuxml2argvtest.c | 2 + 4 files changed, 165 insertions(+), 1 deletion(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-numatune-distances.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-numatune-distances.xml diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index eb72db33b..8b9daaea3 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -7675,7 +7675,7 @@ qemuBuildNumaArgStr(virQEMUDriverConfigPtr cfg, virCommandPtr cmd, qemuDomainObjPrivatePtr priv) { - size_t i; + size_t i, j; virQEMUCapsPtr qemuCaps = priv->qemuCaps; virBuffer buf = VIR_BUFFER_INITIALIZER; char *cpumask = NULL, *tmpmask = NULL, *next = NULL; @@ -7685,6 +7685,7 @@ qemuBuildNumaArgStr(virQEMUDriverConfigPtr cfg, int ret = -1; size_t ncells = virDomainNumaGetNodeCount(def->numa); const long system_page_size = virGetSystemPageSizeKB(); + bool numa_distances = false; if (virDomainNumatuneHasPerNodeBinding(def->numa) && !(virQEMUCapsGet(qemuCaps, QEMU_CAPS_OBJECT_MEMORY_RAM) || @@ -7793,6 +7794,39 @@ qemuBuildNumaArgStr(virQEMUDriverConfigPtr cfg, virCommandAddArgBuffer(cmd, &buf); } + + /* If NUMA node distance is specified for at least one pair + * of nodes, we have to specify all the distances. Even + * though they might be the default ones. */ + for (i = 0; i < ncells; i++) { + for (j = 0; j < ncells; j++) { + if (!virDomainNumaNodeDistanceSpecified(def->numa, i, j)) + continue; + + numa_distances = true; + + if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_NUMA_DIST)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("setting NUMA distances is not " + "supported with this qemu")); + goto cleanup;

+ } + } + } +