[PATCH v2 00/10] sh: remove NUMA and SPARSEMEM support
Mike Rapoport <[email protected]>
| Newsgroups | gmane.linux.ports.sh.devel,gmane.linux.kernel,gmane.linux.kernel.mm |
|---|---|
| Message-ID | <[email protected]> |
From: "Mike Rapoport (Microsoft)" <[email protected]> Hi, NUMA support for SuperH was introduced a long time ago by commit b241cb0c885e ("sh: Support for multiple nodes.") "... for boards with many different memory blocks that are otherwise unused (SH7722/SH7785 URAM and so forth)" In reality, this added 128K of memory on sh7722 and sh7785 and 256K on shx3 at the expense of all the NUMA related code in the kernel. For build of v7.0-rc7 with defconfig and the same configuration with CONFIG_NUMA disabled, bloat-o-meter reports difference of ~76k. Disabling CONFIG_SPARSMEM on top increases the difference to ~94k. And that's only overhead in code and static data that does not take into the account data structures allocated at run time. And all this overhead has been there for nothing for almost 8 years because since commit ac21fc2dcb40 ("sh: switch to NO_BOOTMEM") those additional "nodes" could not be used by the core MM because the maximal pfn for ZONE_NORMAL was cut out at the end of the normal memory. v2 changes: * remove stale SYS_SUPPORTS_NUMA * add Arnd's Reviewed-by v1: https://lore.kernel.org/all/[email protected] Mike Rapoport (Microsoft) (10): sh: remove CONFIG_NUMA and realted configuration options sh: mm: remove numa.c sh: mm: drop allocate_pgdat() sh: remove setup_bootmem_node() and plat_mem_setup() sh: drop dead code guarded by #ifdef CONFIG_NUMA sh: drop include/asm/mmzone.h init/Kconfig: drop ARCH_WANT_NUMA_VARIABLE_LOCALITY sh: init: remove call the memblock_set_node() sh: remove SPARSEMEM related entries from Kconfig sh: drop include/asm/sparsemem.h arch/sh/Kconfig | 12 ------ arch/sh/configs/migor_defconfig | 1 - arch/sh/configs/sdk7786_defconfig | 1 - arch/sh/configs/se7722_defconfig | 1 - arch/sh/configs/shx3_defconfig | 1 - arch/sh/configs/ul2_defconfig | 1 - arch/sh/include/asm/mmu.h | 2 + arch/sh/include/asm/mmzone.h | 42 -------------------- arch/sh/include/asm/setup.h | 3 ++ arch/sh/include/asm/sparsemem.h | 12 ------ arch/sh/include/asm/topology.h | 13 ------- arch/sh/kernel/cpu/sh4a/setup-sh7366.c | 5 --- arch/sh/kernel/cpu/sh4a/setup-sh7722.c | 7 ---- arch/sh/kernel/cpu/sh4a/setup-sh7723.c | 1 - arch/sh/kernel/cpu/sh4a/setup-sh7724.c | 1 - arch/sh/kernel/cpu/sh4a/setup-sh7757.c | 5 --- arch/sh/kernel/cpu/sh4a/setup-sh7785.c | 7 ---- arch/sh/kernel/cpu/sh4a/setup-sh7786.c | 5 --- arch/sh/kernel/cpu/sh4a/setup-shx3.c | 18 --------- arch/sh/kernel/setup.c | 7 ---- arch/sh/kernel/topology.c | 12 ------ arch/sh/kernel/vmcore_info.c | 4 -- arch/sh/mm/Kconfig | 29 -------------- arch/sh/mm/Makefile | 1 - arch/sh/mm/init.c | 24 ------------ arch/sh/mm/numa.c | 53 -------------------------- arch/sh/mm/sram.c | 3 +- init/Kconfig | 7 ---- 28 files changed, 6 insertions(+), 272 deletions(-) delete mode 100644 arch/sh/include/asm/mmzone.h delete mode 100644 arch/sh/include/asm/sparsemem.h delete mode 100644 arch/sh/mm/numa.c base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731 -- 2.53.0