[libvirt] [PATCH v2 06/14] qemu: Implement @access for <memory/> banks
John Ferlan
jferlan at redhat.com
Tue Mar 7 16:31:52 UTC 2017
On 02/27/2017 08:19 AM, Michal Privoznik wrote:
> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
> ---
> src/qemu/qemu_command.c | 11 +++++++--
> src/qemu/qemu_command.h | 1 +
> src/qemu/qemu_hotplug.c | 2 +-
> .../qemuxml2argv-memory-hotplug-nvdimm-access.args | 26 ++++++++++++++++++++++
> tests/qemuxml2argvtest.c | 2 ++
> 5 files changed, 39 insertions(+), 3 deletions(-)
> create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-access.args
>
Umm - even more reason to pass 'mem' to qemuBuildMemoryBackendStr
> diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> index 46a6ca9f0..287387055 100644
> --- a/src/qemu/qemu_command.c
> +++ b/src/qemu/qemu_command.c
> @@ -3090,6 +3090,7 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd,
> * for default
> * @autoNodeset: fallback nodeset in case of automatic NUMA placement
> * @memPathReq: request memory-backend-file with specific mem-path
> + * @memAccessReq: specifically requested memAccess mode
> * @force: forcibly use one of the backends
> *
> * Creates a configuration object that represents memory backend of given guest
> @@ -3122,6 +3123,7 @@ qemuBuildMemoryBackendStr(virJSONValuePtr *backendProps,
> virBitmapPtr userNodeset,
> virBitmapPtr autoNodeset,
> const char *memPathReq,
> + virDomainMemoryAccess memAccessReq,
> bool force)
> {
> virDomainHugePagePtr master_hugepage = NULL;
> @@ -3154,6 +3156,9 @@ qemuBuildMemoryBackendStr(virJSONValuePtr *backendProps,
> memAccess = virDomainNumaGetNodeMemoryAccessMode(def->numa, guestNode);
> }
>
> + if (memAccessReq)
> + memAccess = memAccessReq;
> +
Does or could this overwrite what we just got if guestNode >= 0? and
virDomainNumaGetNodeMemoryAccessMode returns something? Which takes
precedence? Does the first check even matter if the memAccessReq is set?
Could we be more specific on the condition, too... e.g.
if (memAccessReq > VIR_DOMAIN_MEMORY_ACCESS_DEFAULT)
John
> if (virDomainNumatuneGetMode(def->numa, guestNode, &mode) < 0 &&
> virDomainNumatuneGetMode(def->numa, -1, &mode) < 0)
> mode = VIR_DOMAIN_NUMATUNE_MEM_STRICT;
> @@ -3352,7 +3357,9 @@ qemuBuildMemoryCellBackendStr(virDomainDefPtr def,
>
> if ((rc = qemuBuildMemoryBackendStr(&props, &backendType, cfg, qemuCaps,
> def, cell, memsize, 0, NULL,
> - auto_nodeset, NULL, false)) < 0)
> + auto_nodeset, NULL,
> + VIR_DOMAIN_MEMORY_ACCESS_DEFAULT,
> + false)) < 0)
> goto cleanup;
>
> if (!(*backendStr = virQEMUBuildObjectCommandlineFromJSON(backendType,
> @@ -3394,7 +3401,7 @@ qemuBuildMemoryDimmBackendStr(virDomainMemoryDefPtr mem,
> if (qemuBuildMemoryBackendStr(&props, &backendType, cfg, qemuCaps, def,
> mem->targetNode, mem->size, mem->pagesize,
> mem->sourceNodes, auto_nodeset, mem->path,
> - true) < 0)
> + mem->access, true) < 0)
> goto cleanup;
>
> ret = virQEMUBuildObjectCommandlineFromJSON(backendType, alias, props);
> diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h
> index e23930255..e32e1718d 100644
> --- a/src/qemu/qemu_command.h
> +++ b/src/qemu/qemu_command.h
> @@ -135,6 +135,7 @@ int qemuBuildMemoryBackendStr(virJSONValuePtr *backendProps,
> virBitmapPtr userNodeset,
> virBitmapPtr autoNodeset,
> const char *memPath,
> + virDomainMemoryAccess memAccessReq,
> bool force);
>
> char *qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem);
> diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
> index 51b87804d..f2299f66e 100644
> --- a/src/qemu/qemu_hotplug.c
> +++ b/src/qemu/qemu_hotplug.c
> @@ -2219,7 +2219,7 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
> if (qemuBuildMemoryBackendStr(&props, &backendType, cfg, priv->qemuCaps,
> vm->def, mem->targetNode, mem->size,
> mem->pagesize, mem->sourceNodes, NULL,
> - mem->path, true) < 0)
> + mem->path, mem->access, true) < 0)
> goto cleanup;
>
> if (virDomainMemoryInsert(vm->def, mem) < 0) {
> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-access.args b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-access.args
> new file mode 100644
> index 000000000..d398b2294
> --- /dev/null
> +++ b/tests/qemuxml2argvdata/qemuxml2argv-memory-hotplug-nvdimm-access.args
> @@ -0,0 +1,26 @@
> +LC_ALL=C \
> +PATH=/bin \
> +HOME=/home/test \
> +USER=test \
> +LOGNAME=test \
> +QEMU_AUDIO_DRV=none \
> +/usr/bin/qemu \
> +-name QEMUGuest1 \
> +-S \
> +-machine pc,accel=tcg,nvdimm=on \
> +-m size=219136k,slots=16,maxmem=1099511627776k \
> +-smp 2,sockets=2,cores=1,threads=1 \
> +-numa node,nodeid=0,cpus=0-1,mem=214 \
> +-object memory-backend-file,id=memnvdimm0,prealloc=yes,mem-path=/tmp/nvdimm,\
> +share=no,size=536870912 \
> +-device nvdimm,node=0,memdev=memnvdimm0,id=nvdimm0,slot=0 \
> +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
> +-nographic \
> +-nodefaults \
> +-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \
> +-no-acpi \
> +-boot c \
> +-usb \
> +-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
> +-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \
> +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
> index 05a51a389..97a2c55cd 100644
> --- a/tests/qemuxml2argvtest.c
> +++ b/tests/qemuxml2argvtest.c
> @@ -2335,6 +2335,8 @@ mymain(void)
> QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE);
> DO_TEST("memory-hotplug-nvdimm", QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_DEVICE_NVDIMM,
> QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE);
> + DO_TEST("memory-hotplug-nvdimm-access", QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_DEVICE_NVDIMM,
> + QEMU_CAPS_NUMA, QEMU_CAPS_OBJECT_MEMORY_RAM, QEMU_CAPS_OBJECT_MEMORY_FILE);
>
> DO_TEST("machine-aeskeywrap-on-caps",
> QEMU_CAPS_MACHINE_OPT, QEMU_CAPS_AES_KEY_WRAP,
>
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