Re: [PATCH 14/17] mm: introduce numa_emulation
From: Zi Yan <ziy@nvidia.com>
Date: 2024-07-19 16:03:21
Also in:
linux-acpi, linux-arch, linux-arm-kernel, linux-cxl, linux-devicetree, linux-mips, linux-mm, linux-riscv, linux-s390, linux-sh, lkml, loongarch, nvdimm, sparclinux
Subsystem:
documentation, the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Jonathan Corbet, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
On 16 Jul 2024, at 7:13, Mike Rapoport wrote:
From: "Mike Rapoport (Microsoft)" <rppt@kernel.org> Move numa_emulation codfrom arch/x86 to mm/numa_emulation.c This code will be later reused by arch_numa. No functional changes. Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> --- arch/x86/Kconfig | 8 -------- arch/x86/include/asm/numa.h | 12 ------------ arch/x86/mm/Makefile | 1 - arch/x86/mm/numa_internal.h | 11 ----------- include/linux/numa_memblks.h | 17 +++++++++++++++++ mm/Kconfig | 8 ++++++++ mm/Makefile | 1 + mm/numa_emulation.c | 4 +--- 8 files changed, 27 insertions(+), 35 deletions(-)
After this code move, the document of numa=fake= should be moved from Documentation/arch/x86/x86_64/boot-options.rst to Documentation/admin-guide/kernel-parameters.txt too. Something like:
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index bc55fb55cd26..ce3659289b5e 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt@@ -4158,6 +4158,18 @@ Disable NUMA, Only set up a single NUMA node spanning all memory. + numa=fake=<size>[MG] + If given as a memory unit, fills all system RAM with nodes of + size interleaved over physical nodes. + + numa=fake=<N> + If given as an integer, fills all system RAM with N fake nodes + interleaved over physical nodes. + + numa=fake=<N>U + If given as an integer followed by 'U', it will divide each + physical node into N emulated nodes. + numa_balancing= [KNL,ARM64,PPC,RISCV,S390,X86] Enable or disable automatic NUMA balancing. Allowed values are enable and disable
diff --git a/Documentation/arch/x86/x86_64/boot-options.rst b/Documentation/arch/x86/x86_64/boot-options.rst
index 137432d34109..98d4805f0823 100644
--- a/Documentation/arch/x86/x86_64/boot-options.rst
+++ b/Documentation/arch/x86/x86_64/boot-options.rst@@ -170,18 +170,6 @@ NUMA Don't parse the HMAT table for NUMA setup, or soft-reserved memory partitioning. - numa=fake=<size>[MG] - If given as a memory unit, fills all system RAM with nodes of - size interleaved over physical nodes. - - numa=fake=<N> - If given as an integer, fills all system RAM with N fake nodes - interleaved over physical nodes. - - numa=fake=<N>U - If given as an integer followed by 'U', it will divide each - physical node into N emulated nodes. - ACPI ====
Best Regards, Yan, Zi
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