[PATCH v5 0/5] Unify NUMA implementation between ARM64 & RISC-V

[Atish Patra]

On Wed, Nov 18, 2020 at 4:39 PM Atish Patra <atish.patra at wdc.com> wrote:
>
> This series attempts to move the ARM64 numa implementation to common
> code so that RISC-V can leverage that as well instead of reimplementing
> it again.
>
> RISC-V specific bits are based on initial work done by Greentime Hu [1] but
> modified to reuse the common implementation to avoid duplication.
>
> [1] https://lkml.org/lkml/2020/1/10/233
>
> This series has been tested on qemu with numa enabled for both RISC-V & ARM64.
> It would be great if somebody can test it on numa capable ARM64 hardware platforms.
> This patch series doesn't modify the maintainers list for the common code (arch_numa)
> as I am not sure if somebody from ARM64 community or Greg should take up the
> maintainership. Ganapatrao was the original author of the arm64 version.
> I would be happy to update that in the next revision once it is decided.
>
> # numactl --hardware
> available: 2 nodes (0-1)
> node 0 cpus: 0 1 2 3
> node 0 size: 486 MB
> node 0 free: 470 MB
> node 1 cpus: 4 5 6 7
> node 1 size: 424 MB
> node 1 free: 408 MB
> node distances:
> node   0   1
>   0:  10  20
>   1:  20  10
> # numactl -show
> policy: default
> preferred node: current
> physcpubind: 0 1 2 3 4 5 6 7
> cpubind: 0 1
> nodebind: 0 1
> membind: 0 1
>
> The patches are also available at
> https://github.com/atishp04/linux/tree/5.11_numa_unified_v5
>
> For RISC-V, the following qemu series is a pre-requisite(already available in upstream)
> https://patchwork.kernel.org/project/qemu-devel/list/?series=303313
>
> Testing:
> RISC-V:
> Tested in Qemu and 2 socket OmniXtend FPGA.
>
> ARM64:
> 2 socket kunpeng920 (4 nodes around 250G a node)
> Tested-by: Jonathan Cameron <Jonathan.Cameron at huawei.com>
>
> Changes from v4->v5:
> 1. Added by Acked-by & Reviewed-by tags.
> 2. Swapped patch 1 & 2 in v4 version.
>
> Changes from v3->v4:
> 1. Removed redundant duplicate header.
> 2. Added Reviewed-by tags.
>
> Changes from v2->v3:
> 1. Added Acked-by/Reviewed-by tags.
> 2. Replaced asm/acpi.h with linux/acpi.h
> 3. Defined arch_acpi_numa_init as static.
>
> Changes from v1->v2:
> 1. Replaced ARM64 specific compile time protection with ACPI specific ones.
> 2. Dropped common pcibus_to_node changes. Added required changes in RISC-V.
> 3. Fixed few typos.
>
> Atish Patra (4):
> arm64, numa: Change the numa init functions name to be generic
> numa: Move numa implementation to common code
> riscv: Separate memory init from paging init
> riscv: Add numa support for riscv64 platform
>
> Greentime Hu (1):
> riscv: Add support pte_protnone and pmd_protnone if
> CONFIG_NUMA_BALANCING
>
> arch/arm64/Kconfig                            |  1 +
> arch/arm64/include/asm/numa.h                 | 48 +----------------
> arch/arm64/kernel/acpi_numa.c                 | 12 -----
> arch/arm64/mm/Makefile                        |  1 -
> arch/arm64/mm/init.c                          |  4 +-
> arch/riscv/Kconfig                            | 31 ++++++++++-
> arch/riscv/include/asm/mmzone.h               | 13 +++++
> arch/riscv/include/asm/numa.h                 |  8 +++
> arch/riscv/include/asm/pci.h                  | 14 +++++
> arch/riscv/include/asm/pgtable.h              | 21 ++++++++
> arch/riscv/kernel/setup.c                     | 11 +++-
> arch/riscv/kernel/smpboot.c                   | 12 ++++-
> arch/riscv/mm/init.c                          | 10 +++-
> drivers/base/Kconfig                          |  6 +++
> drivers/base/Makefile                         |  1 +
> .../mm/numa.c => drivers/base/arch_numa.c     | 27 ++++++++--
> include/asm-generic/numa.h                    | 52 +++++++++++++++++++
> 17 files changed, 200 insertions(+), 72 deletions(-)
> create mode 100644 arch/riscv/include/asm/mmzone.h
> create mode 100644 arch/riscv/include/asm/numa.h
> rename arch/arm64/mm/numa.c => drivers/base/arch_numa.c (96%)
> create mode 100644 include/asm-generic/numa.h
>
> --
> 2.25.1
>
>
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Hey Palmer,
I did not see this series in for-next. Let me know if you need
anything else to be done for this series.

-- 
Regards,
Atish