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[Qemu-devel] [PULL v5 18/43] numa: deprecate implict memory distribution
From: |
Eduardo Habkost |
Subject: |
[Qemu-devel] [PULL v5 18/43] numa: deprecate implict memory distribution between nodes |
Date: |
Wed, 3 Jul 2019 18:07:56 -0300 |
From: Igor Mammedov <address@hidden>
Implicit RAM distribution between nodes has exactly the same issues as:
"numa: deprecate 'mem' parameter of '-numa node' option"
only with QEMU being the user that's 'adding' 'mem' parameter.
Deprecate it, to get it out of the way so that we could consolidate
guest RAM allocation using memory backends making it consistent and
possibly later on transition to using memory devices instead of
adhoc memory mapping for the initial RAM.
Signed-off-by: Igor Mammedov <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Eduardo Habkost <address@hidden>
---
hw/core/numa.c | 3 +++
qemu-deprecated.texi | 8 ++++++++
2 files changed, 11 insertions(+)
diff --git a/hw/core/numa.c b/hw/core/numa.c
index b15fbdf79a..b74262b743 100644
--- a/hw/core/numa.c
+++ b/hw/core/numa.c
@@ -405,6 +405,9 @@ void numa_complete_configuration(MachineState *ms)
if (i == nb_numa_nodes) {
assert(mc->numa_auto_assign_ram);
mc->numa_auto_assign_ram(mc, numa_info, nb_numa_nodes, ram_size);
+ warn_report("Default splitting of RAM between nodes is deprecated,"
+ " Use '-numa node,memdev' to explictly define RAM"
+ " allocation per node");
}
numa_total = 0;
diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi
index 44c9a95966..2fe9b72121 100644
--- a/qemu-deprecated.texi
+++ b/qemu-deprecated.texi
@@ -104,6 +104,14 @@ In future new machine versions will not accept the option
but it will still
work with old machine types. User can check QAPI schema to see if the legacy
option is supported by looking at MachineInfo::numa-mem-supported property.
+@subsection -numa node (without memory specified) (since 4.1)
+
+Splitting RAM by default between NUMA nodes has the same issues as @option{mem}
+parameter described above with the difference that the role of the user plays
+QEMU using implicit generic or board specific splitting rule.
+Use @option{memdev} with @var{memory-backend-ram} backend or @option{mem} (if
+it's supported by used machine type) to define mapping explictly instead.
+
@section QEMU Machine Protocol (QMP) commands
@subsection block-dirty-bitmap-add "autoload" parameter (since 2.12.0)
--
2.18.0.rc1.1.g3f1ff2140
- [Qemu-devel] [PULL v5 02/43] machine: Refactor smp-related call chains to pass MachineState, (continued)
- [Qemu-devel] [PULL v5 02/43] machine: Refactor smp-related call chains to pass MachineState, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 03/43] general: Replace global smp variables with smp machine properties, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 04/43] hw/ppc: Replace global smp variables with machine smp properties, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 05/43] hw/riscv: Replace global smp variables with machine smp properties, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 06/43] hw/s390x: Replace global smp variables with machine smp properties, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 08/43] hw/arm: Replace global smp variables with machine smp properties, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 07/43] hw/i386: Replace global smp variables with machine smp properties, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 13/43] i386/cpu: Consolidate die-id validity in smp context, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 09/43] hw: Replace global smp variables with MachineState for all remaining archs, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 11/43] i386: Add die-level cpu topology to x86CPU on PCMachine, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 18/43] numa: deprecate implict memory distribution between nodes,
Eduardo Habkost <=
- [Qemu-devel] [PULL v5 16/43] machine: show if CLI option '-numa node, mem' is supported in QAPI schema, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 25/43] x86/cpu: use FeatureWordArray to define filtered_features, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 22/43] i386: Don't print warning if phys-bits was set automatically, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 21/43] deprecate -mem-path fallback to anonymous RAM, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 10/43] vl.c: Replace smp global variables with smp machine properties, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 15/43] pc: fix possible NULL pointer dereference in pc_machine_get_device_memory_region_size(), Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 19/43] hppa: Delete unused hppa_cpu_list() function, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 14/43] i386: Update new x86_apicid parsing rules with die_offset support, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 20/43] target/i386: fix feature check in hyperv-stub.c, Eduardo Habkost, 2019/07/03
- [Qemu-devel] [PULL v5 24/43] i386: make 'hv-spinlocks' a regular uint32 property, Eduardo Habkost, 2019/07/03