src/qemu/qemu_command.c | 32 +++++++++++++++---- .../hugepages-nvdimm.x86_64-latest.args | 6 +--- ...memory-default-hugepage.x86_64-latest.args | 5 +-- .../memfd-memory-numa.x86_64-latest.args | 5 +-- ...y-hotplug-nvdimm-access.x86_64-latest.args | 4 +-- ...ry-hotplug-nvdimm-align.x86_64-latest.args | 4 +-- ...ry-hotplug-nvdimm-label.x86_64-latest.args | 4 +-- ...ory-hotplug-nvdimm-pmem.x86_64-latest.args | 4 +-- ...hotplug-nvdimm-readonly.x86_64-latest.args | 4 +-- .../memory-hotplug-nvdimm.x86_64-latest.args | 4 +-- .../numatune-hmat.x86_64-latest.args | 4 +-- ...vhost-user-fs-fd-memory.x86_64-latest.args | 4 +-- ...vhost-user-fs-hugepages.x86_64-latest.args | 5 +-- ...host-user-gpu-secondary.x86_64-latest.args | 3 +- .../vhost-user-vga.x86_64-latest.args | 3 +- 15 files changed, 39 insertions(+), 52 deletions(-)
In 88957116c9 I've switched to -machine memory-backend=ID and
-object memory-backend-* because QEMU is obsoleting -mem-path
and -mem-prealloc. However, what I did not foresee was that using
-machine memory-backend in combination with -numa is not allowed
in QEMU. This was reported upstream and fortunately not released
yet.
The problem is that if domain has NUMA nodes then we will
generate memory-backend-* objects for NUMA nodes (because if QEMU
is new enough to expose default RAM ID it also supports -numa
memdev=) and adding non-NUMA memory backend is wrong.
Reported-by: Masayoshi Mizuma <msys.mizuma@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
---
src/qemu/qemu_command.c | 32 +++++++++++++++----
.../hugepages-nvdimm.x86_64-latest.args | 6 +---
...memory-default-hugepage.x86_64-latest.args | 5 +--
.../memfd-memory-numa.x86_64-latest.args | 5 +--
...y-hotplug-nvdimm-access.x86_64-latest.args | 4 +--
...ry-hotplug-nvdimm-align.x86_64-latest.args | 4 +--
...ry-hotplug-nvdimm-label.x86_64-latest.args | 4 +--
...ory-hotplug-nvdimm-pmem.x86_64-latest.args | 4 +--
...hotplug-nvdimm-readonly.x86_64-latest.args | 4 +--
.../memory-hotplug-nvdimm.x86_64-latest.args | 4 +--
.../numatune-hmat.x86_64-latest.args | 4 +--
...vhost-user-fs-fd-memory.x86_64-latest.args | 4 +--
...vhost-user-fs-hugepages.x86_64-latest.args | 5 +--
...host-user-gpu-secondary.x86_64-latest.args | 3 +-
.../vhost-user-vga.x86_64-latest.args | 3 +-
15 files changed, 39 insertions(+), 52 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 476cf6972e..c347f80f08 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6829,7 +6829,6 @@ qemuBuildMachineCommandLine(virCommandPtr cmd,
virTristateSwitch vmport = def->features[VIR_DOMAIN_FEATURE_VMPORT];
virTristateSwitch smm = def->features[VIR_DOMAIN_FEATURE_SMM];
virCPUDefPtr cpu = def->cpu;
- const char *defaultRAMid = NULL;
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
size_t i;
@@ -7046,11 +7045,24 @@ qemuBuildMachineCommandLine(virCommandPtr cmd,
if (virDomainNumaHasHMAT(def->numa))
virBufferAddLit(&buf, ",hmat=on");
- defaultRAMid = virQEMUCapsGetMachineDefaultRAMid(qemuCaps,
- def->virtType,
- def->os.machine);
- if (defaultRAMid)
- virBufferAsprintf(&buf, ",memory-backend=%s", defaultRAMid);
+ if (!virDomainNumaGetNodeCount(def->numa)) {
+ const char *defaultRAMid = NULL;
+
+ /* QEMU is obsoleting -mem-path and -mem-prealloc. That means we have
+ * to switch to memory-backend-* even for regular RAM and to keep
+ * domain migratable we have to set the same ID as older QEMUs would.
+ * If domain has no NUMA nodes and QEMU is new enough to expose ID of
+ * the default RAM we want to use it for default RAM (construct
+ * memory-backend-* with corresponding attributes instead of obsolete
+ * -mem-path and -mem-prealloc.
+ * This generates only reference for the memory-backend-* object added
+ * later in qemuBuildMemCommandLine() */
+ defaultRAMid = virQEMUCapsGetMachineDefaultRAMid(qemuCaps,
+ def->virtType,
+ def->os.machine);
+ if (defaultRAMid)
+ virBufferAsprintf(&buf, ",memory-backend=%s", defaultRAMid);
+ }
virCommandAddArgBuffer(cmd, &buf);
@@ -7216,7 +7228,13 @@ qemuBuildMemCommandLine(virCommandPtr cmd,
def->os.machine);
if (defaultRAMid) {
- qemuBuildMemCommandLineMemoryDefaultBackend(cmd, def, priv, defaultRAMid);
+ /* As documented in qemuBuildMachineCommandLine() if QEMU is new enough
+ * to expose default RAM ID we must use memory-backend-* even for
+ * regular memory because -mem-path and -mem-prealloc are obsolete.
+ * However, if domain has one or more NUMA nodes then there is no
+ * default RAM and we mustn't generate the memory object. */
+ if (!virDomainNumaGetNodeCount(def->numa))
+ qemuBuildMemCommandLineMemoryDefaultBackend(cmd, def, priv, defaultRAMid);
} else {
if (def->mem.allocation == VIR_DOMAIN_MEMORY_ALLOCATION_IMMEDIATE) {
virCommandAddArgList(cmd, "-mem-prealloc", NULL);
diff --git a/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args b/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args
index 192b033e9e..969bb713b5 100644
--- a/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args
@@ -12,13 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
-memory-backend=pc.ram \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
-cpu qemu64 \
-m size=1048576k,slots=16,maxmem=1099511627776k \
--object memory-backend-file,id=pc.ram,\
-mem-path=/dev/hugepages2M/libvirt/qemu/-1-QEMUGuest1,share=yes,prealloc=yes,\
-size=1073741824 \
-overcommit mem-lock=off \
-smp 2,sockets=2,dies=1,cores=1,threads=1 \
-object memory-backend-file,id=ram-node0,\
diff --git a/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args b/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args
index b43e7d9c3c..ef15e2e97e 100644
--- a/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args
@@ -12,12 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-instance-00000092/master-key.aes \
--machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off,\
-memory-backend=pc.ram \
+-machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off \
-cpu qemu64 \
-m 14336 \
--object memory-backend-memfd,id=pc.ram,hugetlb=yes,hugetlbsize=2097152,\
-share=yes,prealloc=yes,size=15032385536 \
-overcommit mem-lock=off \
-smp 8,sockets=1,dies=1,cores=8,threads=1 \
-object memory-backend-memfd,id=ram-node0,hugetlb=yes,hugetlbsize=2097152,\
diff --git a/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args b/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args
index b43e7d9c3c..ef15e2e97e 100644
--- a/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args
@@ -12,12 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-instance-00000092/master-key.aes \
--machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off,\
-memory-backend=pc.ram \
+-machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off \
-cpu qemu64 \
-m 14336 \
--object memory-backend-memfd,id=pc.ram,hugetlb=yes,hugetlbsize=2097152,\
-share=yes,prealloc=yes,size=15032385536 \
-overcommit mem-lock=off \
-smp 8,sockets=1,dies=1,cores=8,threads=1 \
-object memory-backend-memfd,id=ram-node0,hugetlb=yes,hugetlbsize=2097152,\
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args
index c5c5befdd5..8d3fa2e867 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args
@@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
-memory-backend=pc.ram \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
-cpu qemu64 \
-m size=219136k,slots=16,maxmem=1099511627776k \
--object memory-backend-ram,id=pc.ram,size=224395264 \
-overcommit mem-lock=off \
-smp 2,sockets=2,dies=1,cores=1,threads=1 \
-object memory-backend-ram,id=ram-node0,size=224395264 \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args
index 418bf1158d..4f22f78277 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args
@@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
-memory-backend=pc.ram \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
-cpu qemu64 \
-m size=219136k,slots=16,maxmem=1099511627776k \
--object memory-backend-ram,id=pc.ram,size=224395264 \
-overcommit mem-lock=off \
-smp 2,sockets=2,dies=1,cores=1,threads=1 \
-object memory-backend-ram,id=ram-node0,size=224395264 \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args
index 66477a2b09..53dda234a2 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args
@@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
-memory-backend=pc.ram \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
-cpu qemu64 \
-m size=219136k,slots=16,maxmem=1099511627776k \
--object memory-backend-ram,id=pc.ram,size=224395264 \
-overcommit mem-lock=off \
-smp 2,sockets=2,dies=1,cores=1,threads=1 \
-object memory-backend-ram,id=ram-node0,size=224395264 \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args
index 759d749c2e..cac02a6f6d 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args
@@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
-memory-backend=pc.ram \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
-cpu qemu64 \
-m size=219136k,slots=16,maxmem=1099511627776k \
--object memory-backend-ram,id=pc.ram,size=224395264 \
-overcommit mem-lock=off \
-smp 2,sockets=2,dies=1,cores=1,threads=1 \
-object memory-backend-ram,id=ram-node0,size=224395264 \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args
index b195b8625c..5e44496e39 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args
@@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
-memory-backend=pc.ram \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
-cpu qemu64 \
-m size=219136k,slots=16,maxmem=1099511627776k \
--object memory-backend-ram,id=pc.ram,size=224395264 \
-overcommit mem-lock=off \
-smp 2,sockets=2,dies=1,cores=1,threads=1 \
-object memory-backend-ram,id=ram-node0,size=224395264 \
diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args
index ae416d7c7f..94f8444d95 100644
--- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args
@@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
-memory-backend=pc.ram \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
-cpu qemu64 \
-m size=1048576k,slots=16,maxmem=1099511627776k \
--object memory-backend-ram,id=pc.ram,size=1073741824 \
-overcommit mem-lock=off \
-smp 2,sockets=2,dies=1,cores=1,threads=1 \
-object memory-backend-ram,id=ram-node0,size=1073741824 \
diff --git a/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args b/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args
index be4a9ed871..c52015caa8 100644
--- a/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args
@@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-QEMUGuest/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,hmat=on,\
-memory-backend=pc.ram \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off,hmat=on \
-cpu qemu64 \
-m 12288 \
--object memory-backend-ram,id=pc.ram,size=12884901888 \
-overcommit mem-lock=off \
-smp 12,sockets=12,cores=1,threads=1 \
-object memory-backend-ram,id=ram-node0,size=2147483648 \
diff --git a/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
index 13359c91fe..dd5f68abc5 100644
--- a/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
@@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-guest/master-key.aes \
--machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
+-machine pc,accel=kvm,usb=off,dump-guest-core=off \
-cpu qemu64 \
-m 14336 \
--object memory-backend-file,id=pc.ram,\
-mem-path=/var/lib/libvirt/qemu/ram/-1-guest/pc.ram,share=yes,size=15032385536 \
-overcommit mem-lock=off \
-smp 2,sockets=2,cores=1,threads=1 \
-object memory-backend-file,id=ram-node0,\
diff --git a/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
index 59f45d466b..e4f5db7a63 100644
--- a/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
@@ -12,12 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-guest/master-key.aes \
--machine q35,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
+-machine q35,accel=tcg,usb=off,dump-guest-core=off \
-cpu qemu64 \
-m 2048 \
--object memory-backend-file,id=pc.ram,\
-mem-path=/dev/hugepages2M/libvirt/qemu/-1-guest,share=yes,prealloc=yes,\
-size=2147483648 \
-overcommit mem-lock=off \
-smp 2,sockets=2,cores=1,threads=1 \
-object memory-backend-file,id=ram-node0,\
diff --git a/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args
index e7d3315b8f..e99a5342dc 100644
--- a/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args
@@ -12,10 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off \
-cpu qemu64 \
-m 214 \
--object memory-backend-memfd,id=pc.ram,share=yes,size=224395264 \
-overcommit mem-lock=off \
-smp 1,sockets=1,cores=1,threads=1 \
-object memory-backend-memfd,id=ram-node0,share=yes,size=224395264 \
diff --git a/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args
index df5b1b481d..277bf8c646 100644
--- a/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args
@@ -12,10 +12,9 @@ QEMU_AUDIO_DRV=none \
-S \
-object secret,id=masterKey0,format=raw,\
file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
--machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off \
-cpu qemu64 \
-m 214 \
--object memory-backend-memfd,id=pc.ram,share=yes,size=224395264 \
-overcommit mem-lock=off \
-smp 1,sockets=1,cores=1,threads=1 \
-object memory-backend-memfd,id=ram-node0,share=yes,size=224395264 \
--
2.26.2
On 10/7/20 5:01 AM, Michal Privoznik wrote:
> In 88957116c9 I've switched to -machine memory-backend=ID and
> -object memory-backend-* because QEMU is obsoleting -mem-path
> and -mem-prealloc. However, what I did not foresee was that using
> -machine memory-backend in combination with -numa is not allowed
> in QEMU. This was reported upstream and fortunately not released
> yet.
>
> The problem is that if domain has NUMA nodes then we will
> generate memory-backend-* objects for NUMA nodes (because if QEMU
> is new enough to expose default RAM ID it also supports -numa
> memdev=) and adding non-NUMA memory backend is wrong.
>
> Reported-by: Masayoshi Mizuma <msys.mizuma@gmail.com>
> Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
> ---
> src/qemu/qemu_command.c | 32 +++++++++++++++----
> .../hugepages-nvdimm.x86_64-latest.args | 6 +---
> ...memory-default-hugepage.x86_64-latest.args | 5 +--
> .../memfd-memory-numa.x86_64-latest.args | 5 +--
> ...y-hotplug-nvdimm-access.x86_64-latest.args | 4 +--
> ...ry-hotplug-nvdimm-align.x86_64-latest.args | 4 +--
> ...ry-hotplug-nvdimm-label.x86_64-latest.args | 4 +--
> ...ory-hotplug-nvdimm-pmem.x86_64-latest.args | 4 +--
> ...hotplug-nvdimm-readonly.x86_64-latest.args | 4 +--
> .../memory-hotplug-nvdimm.x86_64-latest.args | 4 +--
> .../numatune-hmat.x86_64-latest.args | 4 +--
> ...vhost-user-fs-fd-memory.x86_64-latest.args | 4 +--
> ...vhost-user-fs-hugepages.x86_64-latest.args | 5 +--
> ...host-user-gpu-secondary.x86_64-latest.args | 3 +-
> .../vhost-user-vga.x86_64-latest.args | 3 +-
> 15 files changed, 39 insertions(+), 52 deletions(-)
>
> diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> index 476cf6972e..c347f80f08 100644
> --- a/src/qemu/qemu_command.c
> +++ b/src/qemu/qemu_command.c
> @@ -6829,7 +6829,6 @@ qemuBuildMachineCommandLine(virCommandPtr cmd,
> virTristateSwitch vmport = def->features[VIR_DOMAIN_FEATURE_VMPORT];
> virTristateSwitch smm = def->features[VIR_DOMAIN_FEATURE_SMM];
> virCPUDefPtr cpu = def->cpu;
> - const char *defaultRAMid = NULL;
> g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
> size_t i;
>
> @@ -7046,11 +7045,24 @@ qemuBuildMachineCommandLine(virCommandPtr cmd,
> if (virDomainNumaHasHMAT(def->numa))
> virBufferAddLit(&buf, ",hmat=on");
>
> - defaultRAMid = virQEMUCapsGetMachineDefaultRAMid(qemuCaps,
> - def->virtType,
> - def->os.machine);
> - if (defaultRAMid)
> - virBufferAsprintf(&buf, ",memory-backend=%s", defaultRAMid);
> + if (!virDomainNumaGetNodeCount(def->numa)) {
> + const char *defaultRAMid = NULL;
> +
> + /* QEMU is obsoleting -mem-path and -mem-prealloc. That means we have
> + * to switch to memory-backend-* even for regular RAM and to keep
> + * domain migratable we have to set the same ID as older QEMUs would.
> + * If domain has no NUMA nodes and QEMU is new enough to expose ID of
> + * the default RAM we want to use it for default RAM (construct
> + * memory-backend-* with corresponding attributes instead of obsolete
> + * -mem-path and -mem-prealloc.
I think you're missing a closing ')' in this sentence up here ^
Everything else LGTM.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
> + * This generates only reference for the memory-backend-* object added
> + * later in qemuBuildMemCommandLine() */
> + defaultRAMid = virQEMUCapsGetMachineDefaultRAMid(qemuCaps,
> + def->virtType,
> + def->os.machine);
> + if (defaultRAMid)
> + virBufferAsprintf(&buf, ",memory-backend=%s", defaultRAMid);
> + }
>
> virCommandAddArgBuffer(cmd, &buf);
>
> @@ -7216,7 +7228,13 @@ qemuBuildMemCommandLine(virCommandPtr cmd,
> def->os.machine);
>
> if (defaultRAMid) {
> - qemuBuildMemCommandLineMemoryDefaultBackend(cmd, def, priv, defaultRAMid);
> + /* As documented in qemuBuildMachineCommandLine() if QEMU is new enough
> + * to expose default RAM ID we must use memory-backend-* even for
> + * regular memory because -mem-path and -mem-prealloc are obsolete.
> + * However, if domain has one or more NUMA nodes then there is no
> + * default RAM and we mustn't generate the memory object. */
> + if (!virDomainNumaGetNodeCount(def->numa))
> + qemuBuildMemCommandLineMemoryDefaultBackend(cmd, def, priv, defaultRAMid);
> } else {
> if (def->mem.allocation == VIR_DOMAIN_MEMORY_ALLOCATION_IMMEDIATE) {
> virCommandAddArgList(cmd, "-mem-prealloc", NULL);
> diff --git a/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args b/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args
> index 192b033e9e..969bb713b5 100644
> --- a/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/hugepages-nvdimm.x86_64-latest.args
> @@ -12,13 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
> --machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
> -memory-backend=pc.ram \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
> -cpu qemu64 \
> -m size=1048576k,slots=16,maxmem=1099511627776k \
> --object memory-backend-file,id=pc.ram,\
> -mem-path=/dev/hugepages2M/libvirt/qemu/-1-QEMUGuest1,share=yes,prealloc=yes,\
> -size=1073741824 \
> -overcommit mem-lock=off \
> -smp 2,sockets=2,dies=1,cores=1,threads=1 \
> -object memory-backend-file,id=ram-node0,\
> diff --git a/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args b/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args
> index b43e7d9c3c..ef15e2e97e 100644
> --- a/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/memfd-memory-default-hugepage.x86_64-latest.args
> @@ -12,12 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-instance-00000092/master-key.aes \
> --machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off,\
> -memory-backend=pc.ram \
> +-machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off \
> -cpu qemu64 \
> -m 14336 \
> --object memory-backend-memfd,id=pc.ram,hugetlb=yes,hugetlbsize=2097152,\
> -share=yes,prealloc=yes,size=15032385536 \
> -overcommit mem-lock=off \
> -smp 8,sockets=1,dies=1,cores=8,threads=1 \
> -object memory-backend-memfd,id=ram-node0,hugetlb=yes,hugetlbsize=2097152,\
> diff --git a/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args b/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args
> index b43e7d9c3c..ef15e2e97e 100644
> --- a/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/memfd-memory-numa.x86_64-latest.args
> @@ -12,12 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-instance-00000092/master-key.aes \
> --machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off,\
> -memory-backend=pc.ram \
> +-machine pc-i440fx-2.3,accel=kvm,usb=off,dump-guest-core=off \
> -cpu qemu64 \
> -m 14336 \
> --object memory-backend-memfd,id=pc.ram,hugetlb=yes,hugetlbsize=2097152,\
> -share=yes,prealloc=yes,size=15032385536 \
> -overcommit mem-lock=off \
> -smp 8,sockets=1,dies=1,cores=8,threads=1 \
> -object memory-backend-memfd,id=ram-node0,hugetlb=yes,hugetlbsize=2097152,\
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args
> index c5c5befdd5..8d3fa2e867 100644
> --- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-access.x86_64-latest.args
> @@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
> --machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
> -memory-backend=pc.ram \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
> -cpu qemu64 \
> -m size=219136k,slots=16,maxmem=1099511627776k \
> --object memory-backend-ram,id=pc.ram,size=224395264 \
> -overcommit mem-lock=off \
> -smp 2,sockets=2,dies=1,cores=1,threads=1 \
> -object memory-backend-ram,id=ram-node0,size=224395264 \
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args
> index 418bf1158d..4f22f78277 100644
> --- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-align.x86_64-latest.args
> @@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
> --machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
> -memory-backend=pc.ram \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
> -cpu qemu64 \
> -m size=219136k,slots=16,maxmem=1099511627776k \
> --object memory-backend-ram,id=pc.ram,size=224395264 \
> -overcommit mem-lock=off \
> -smp 2,sockets=2,dies=1,cores=1,threads=1 \
> -object memory-backend-ram,id=ram-node0,size=224395264 \
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args
> index 66477a2b09..53dda234a2 100644
> --- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-label.x86_64-latest.args
> @@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
> --machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
> -memory-backend=pc.ram \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
> -cpu qemu64 \
> -m size=219136k,slots=16,maxmem=1099511627776k \
> --object memory-backend-ram,id=pc.ram,size=224395264 \
> -overcommit mem-lock=off \
> -smp 2,sockets=2,dies=1,cores=1,threads=1 \
> -object memory-backend-ram,id=ram-node0,size=224395264 \
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args
> index 759d749c2e..cac02a6f6d 100644
> --- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-pmem.x86_64-latest.args
> @@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
> --machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
> -memory-backend=pc.ram \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
> -cpu qemu64 \
> -m size=219136k,slots=16,maxmem=1099511627776k \
> --object memory-backend-ram,id=pc.ram,size=224395264 \
> -overcommit mem-lock=off \
> -smp 2,sockets=2,dies=1,cores=1,threads=1 \
> -object memory-backend-ram,id=ram-node0,size=224395264 \
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args
> index b195b8625c..5e44496e39 100644
> --- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm-readonly.x86_64-latest.args
> @@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
> --machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
> -memory-backend=pc.ram \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
> -cpu qemu64 \
> -m size=219136k,slots=16,maxmem=1099511627776k \
> --object memory-backend-ram,id=pc.ram,size=224395264 \
> -overcommit mem-lock=off \
> -smp 2,sockets=2,dies=1,cores=1,threads=1 \
> -object memory-backend-ram,id=ram-node0,size=224395264 \
> diff --git a/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args b/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args
> index ae416d7c7f..94f8444d95 100644
> --- a/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/memory-hotplug-nvdimm.x86_64-latest.args
> @@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
> --machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on,\
> -memory-backend=pc.ram \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,nvdimm=on \
> -cpu qemu64 \
> -m size=1048576k,slots=16,maxmem=1099511627776k \
> --object memory-backend-ram,id=pc.ram,size=1073741824 \
> -overcommit mem-lock=off \
> -smp 2,sockets=2,dies=1,cores=1,threads=1 \
> -object memory-backend-ram,id=ram-node0,size=1073741824 \
> diff --git a/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args b/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args
> index be4a9ed871..c52015caa8 100644
> --- a/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/numatune-hmat.x86_64-latest.args
> @@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-QEMUGuest/master-key.aes \
> --machine pc,accel=tcg,usb=off,dump-guest-core=off,hmat=on,\
> -memory-backend=pc.ram \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off,hmat=on \
> -cpu qemu64 \
> -m 12288 \
> --object memory-backend-ram,id=pc.ram,size=12884901888 \
> -overcommit mem-lock=off \
> -smp 12,sockets=12,cores=1,threads=1 \
> -object memory-backend-ram,id=ram-node0,size=2147483648 \
> diff --git a/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
> index 13359c91fe..dd5f68abc5 100644
> --- a/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
> @@ -12,11 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-guest/master-key.aes \
> --machine pc,accel=kvm,usb=off,dump-guest-core=off,memory-backend=pc.ram \
> +-machine pc,accel=kvm,usb=off,dump-guest-core=off \
> -cpu qemu64 \
> -m 14336 \
> --object memory-backend-file,id=pc.ram,\
> -mem-path=/var/lib/libvirt/qemu/ram/-1-guest/pc.ram,share=yes,size=15032385536 \
> -overcommit mem-lock=off \
> -smp 2,sockets=2,cores=1,threads=1 \
> -object memory-backend-file,id=ram-node0,\
> diff --git a/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
> index 59f45d466b..e4f5db7a63 100644
> --- a/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
> @@ -12,12 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-guest/master-key.aes \
> --machine q35,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
> +-machine q35,accel=tcg,usb=off,dump-guest-core=off \
> -cpu qemu64 \
> -m 2048 \
> --object memory-backend-file,id=pc.ram,\
> -mem-path=/dev/hugepages2M/libvirt/qemu/-1-guest,share=yes,prealloc=yes,\
> -size=2147483648 \
> -overcommit mem-lock=off \
> -smp 2,sockets=2,cores=1,threads=1 \
> -object memory-backend-file,id=ram-node0,\
> diff --git a/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args
> index e7d3315b8f..e99a5342dc 100644
> --- a/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/vhost-user-gpu-secondary.x86_64-latest.args
> @@ -12,10 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
> --machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off \
> -cpu qemu64 \
> -m 214 \
> --object memory-backend-memfd,id=pc.ram,share=yes,size=224395264 \
> -overcommit mem-lock=off \
> -smp 1,sockets=1,cores=1,threads=1 \
> -object memory-backend-memfd,id=ram-node0,share=yes,size=224395264 \
> diff --git a/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args
> index df5b1b481d..277bf8c646 100644
> --- a/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args
> +++ b/tests/qemuxml2argvdata/vhost-user-vga.x86_64-latest.args
> @@ -12,10 +12,9 @@ QEMU_AUDIO_DRV=none \
> -S \
> -object secret,id=masterKey0,format=raw,\
> file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
> --machine pc,accel=tcg,usb=off,dump-guest-core=off,memory-backend=pc.ram \
> +-machine pc,accel=tcg,usb=off,dump-guest-core=off \
> -cpu qemu64 \
> -m 214 \
> --object memory-backend-memfd,id=pc.ram,share=yes,size=224395264 \
> -overcommit mem-lock=off \
> -smp 1,sockets=1,cores=1,threads=1 \
> -object memory-backend-memfd,id=ram-node0,share=yes,size=224395264 \
>
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