[PATCH RFC 02/12] mm: add config option and per-NUMA node VMS support
From: <hidden>
Date: 2023-12-28 13:12:49
Also in:
linux-mm
Subsystem:
memory management, memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
From: Artem Kuzin <redacted> Co-developed-by: Nikita Panov <redacted> Signed-off-by: Nikita Panov <redacted> Co-developed-by: Alexander Grubnikov <redacted> Signed-off-by: Alexander Grubnikov <redacted> Signed-off-by: Artem Kuzin <redacted> --- include/linux/mm_types.h | 11 ++++++++++- mm/Kconfig | 10 ++++++++++ 2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 7d30dc4ff0ff..1fafb8425994 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h@@ -22,6 +22,8 @@ #include <asm/mmu.h> +#include <linux/numa.h> + #ifndef AT_VECTOR_SIZE_ARCH #define AT_VECTOR_SIZE_ARCH 0 #endif
@@ -626,7 +628,14 @@ struct mm_struct { unsigned long mmap_compat_legacy_base; #endif unsigned long task_size; /* size of task vm space */ - pgd_t * pgd; +#ifndef CONFIG_KERNEL_REPLICATION + pgd_t *pgd; +#else + union { + pgd_t *pgd; + pgd_t *pgd_numa[MAX_NUMNODES]; + }; +#endif #ifdef CONFIG_MEMBARRIER /**
diff --git a/mm/Kconfig b/mm/Kconfig
index 09130434e30d..5fe5b3ba7f99 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig@@ -1236,6 +1236,16 @@ config LOCK_MM_AND_FIND_VMA bool depends on !STACK_GROWSUP +config KERNEL_REPLICATION + bool "Enable kernel text and ro-data replication between NUMA nodes" + default n + depends on (X86_64 && !(KASAN && X86_5LEVEL)) && MMU && NUMA && !MAXSMP + + help + Creates per-NUMA node replicas of kernel text and rodata sections. + Page tables are replicated partially, according to replicated kernel memory range. + If unsure, say "n". + source "mm/damon/Kconfig" endmenu
--
2.34.1