linux/arch
Liam Ni ff6c3d81f2 NUMA: optimize detection of memory with no node id assigned by firmware
Sanity check that makes sure the nodes cover all memory loops over
numa_meminfo to count the pages that have node id assigned by the
firmware, then loops again over memblock.memory to find the total amount
of memory and in the end checks that the difference between the total
memory and memory that covered by nodes is less than some threshold. 
Worse, the loop over numa_meminfo calls __absent_pages_in_range() that
also partially traverses memblock.memory.

It's much simpler and more efficient to have a single traversal of
memblock.memory that verifies that amount of memory not covered by nodes
is less than a threshold.

Introduce memblock_validate_numa_coverage() that does exactly that and use
it instead of numa_meminfo_cover_memory().

Link: https://lkml.kernel.org/r/20231026020329.327329-1-zhiguangni01@gmail.com
Signed-off-by: Liam Ni <zhiguangni01@gmail.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Bibo Mao <maobibo@loongson.cn>
Cc: Binbin Zhou <zhoubinbin@loongson.cn>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Feiyang Chen <chenfeiyang@loongson.cn>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: WANG Xuerui <kernel@xen0n.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-12-10 16:51:34 -08:00
..
alpha TTY/Serial changes for 6.7-rc1 2023-11-03 15:44:25 -10:00
arc kprobes: unify kprobes_exceptions_nofify() prototypes 2023-11-10 19:59:05 +09:00
arm Merge branch 'master' into mm-hotfixes-stable 2023-12-06 17:03:50 -08:00
arm64 arm64: Avoid enabling KPTI unnecessarily 2023-11-30 19:07:33 +00:00
csky Kbuild updates for v6.7 2023-11-04 08:07:19 -10:00
hexagon TTY/Serial changes for 6.7-rc1 2023-11-03 15:44:25 -10:00
loongarch NUMA: optimize detection of memory with no node id assigned by firmware 2023-12-10 16:51:34 -08:00
m68k Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
microblaze asm-generic updates for v6.7 2023-11-01 15:28:33 -10:00
mips Probes fixes for v6.7-rc1: 2023-11-10 16:35:04 -08:00
nios2 vgacon, arch/*: remove unused screen_info definitions 2023-10-17 10:17:02 +02:00
openrisc
parisc parisc: Reduce size of the bug_table on 64-bit kernel by half 2023-11-25 09:43:18 +01:00
powerpc KVM: PPC: Book3S HV: Fix KVM_RUN clobbering FP/VEC user registers 2023-11-29 22:24:21 +11:00
riscv RISC-V Patches for the 6.7 Merge Window, Part 2 2023-11-10 09:23:17 -08:00
s390 s390: remove odd comment 2023-11-22 13:55:13 +01:00
sh kprobes: unify kprobes_exceptions_nofify() prototypes 2023-11-10 19:59:05 +09:00
sparc kprobes: unify kprobes_exceptions_nofify() prototypes 2023-11-10 19:59:05 +09:00
um um,ethertap: Replace deprecated strncpy() with strscpy() 2023-09-29 11:37:50 -07:00
x86 NUMA: optimize detection of memory with no node id assigned by firmware 2023-12-10 16:51:34 -08:00
xtensa TTY/Serial changes for 6.7-rc1 2023-11-03 15:44:25 -10:00
.gitignore
Kconfig arch: Remove Itanium (IA-64) architecture 2023-09-11 08:13:17 +00:00