On Tue, 02 Mar 2021 00:41:59 PST (-0800), song.bao.hua@xxxxxxxxxxxxx wrote:
X86 isn't the only architecture supporting NUMA_BALANCING. ARM64, PPC, S390 and RISCV also support it: arch$ git grep NUMA_BALANCING arm64/Kconfig: select ARCH_SUPPORTS_NUMA_BALANCING arm64/configs/defconfig:CONFIG_NUMA_BALANCING=y arm64/include/asm/pgtable.h:#ifdef CONFIG_NUMA_BALANCING powerpc/configs/powernv_defconfig:CONFIG_NUMA_BALANCING=y powerpc/configs/ppc64_defconfig:CONFIG_NUMA_BALANCING=y powerpc/configs/pseries_defconfig:CONFIG_NUMA_BALANCING=y powerpc/include/asm/book3s/64/pgtable.h:#ifdef CONFIG_NUMA_BALANCING powerpc/include/asm/book3s/64/pgtable.h:#ifdef CONFIG_NUMA_BALANCING powerpc/include/asm/book3s/64/pgtable.h:#endif /* CONFIG_NUMA_BALANCING */ powerpc/include/asm/book3s/64/pgtable.h:#ifdef CONFIG_NUMA_BALANCING powerpc/include/asm/book3s/64/pgtable.h:#endif /* CONFIG_NUMA_BALANCING */ powerpc/include/asm/nohash/pgtable.h:#ifdef CONFIG_NUMA_BALANCING powerpc/include/asm/nohash/pgtable.h:#endif /* CONFIG_NUMA_BALANCING */ powerpc/platforms/Kconfig.cputype: select ARCH_SUPPORTS_NUMA_BALANCING riscv/Kconfig: select ARCH_SUPPORTS_NUMA_BALANCING riscv/include/asm/pgtable.h:#ifdef CONFIG_NUMA_BALANCING s390/Kconfig: select ARCH_SUPPORTS_NUMA_BALANCING s390/configs/debug_defconfig:CONFIG_NUMA_BALANCING=y s390/configs/defconfig:CONFIG_NUMA_BALANCING=y s390/include/asm/pgtable.h:#ifdef CONFIG_NUMA_BALANCING x86/Kconfig: select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 x86/include/asm/pgtable.h:#ifdef CONFIG_NUMA_BALANCING x86/include/asm/pgtable.h:#endif /* CONFIG_NUMA_BALANCING */ On the other hand, setup_numabalancing() is implemented in mm/mempolicy.c which doesn't depend on architectures. Cc: Mel Gorman <mgorman@xxxxxxx> Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx> Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx> Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx> Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxx> Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> Cc: Viresh Kumar <viresh.kumar@xxxxxxxxxx> Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Signed-off-by: Barry Song <song.bao.hua@xxxxxxxxxxxxx> --- Documentation/admin-guide/kernel-parameters.rst | 1 + Documentation/admin-guide/kernel-parameters.txt | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst index 1132796a8d96..24302cad174a 100644 --- a/Documentation/admin-guide/kernel-parameters.rst +++ b/Documentation/admin-guide/kernel-parameters.rst @@ -140,6 +140,7 @@ parameter is applicable:: PPT Parallel port support is enabled. PS2 Appropriate PS/2 support is enabled. RAM RAM disk support is enabled. + RISCV RISCV architecture is enabled. RDT Intel Resource Director Technology. S390 S390 architecture is enabled. SCSI Appropriate SCSI support is enabled. diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 04545725f187..371a02ae1e21 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3472,7 +3472,8 @@ nr_uarts= [SERIAL] maximum number of UARTs to be registered. - numa_balancing= [KNL,X86] Enable or disable automatic NUMA balancing. + numa_balancing= [KNL,ARM64,PPC,RISCV,S390,X86] Enable or disable automatic + NUMA balancing. Allowed values are enable and disable numa_zonelist_order= [KNL, BOOT] Select zonelist order for NUMA.
Reviewed-by: Palmer Dabbelt <palmerdabbelt@xxxxxxxxxx> Acked-by: Palmer Dabbelt <palmerdabbelt@xxxxxxxxxx>
