The patch titled
Subject: mm/page_alloc.c: remove unneeded codes in !NUMA version of build_zonelists()
has been added to the -mm mm-unstable branch. Its filename is
mm-page_allocc-remove-unneeded-codes-in-numa-version-of-build_zonelists.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_allocc-remove-unneeded-codes-in-numa-version-of-build_zonelists.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Baoquan He <bhe@xxxxxxxxxx>
Subject: mm/page_alloc.c: remove unneeded codes in !NUMA version of build_zonelists()
Date: Tue, 26 Mar 2024 14:11:30 +0800
When CONFIG_NUMA=n, MAX_NUMNODES is always 1 because Kconfig item
NODES_SHIFT depends on NUMA. So in !NUMA version of build_zonelists(), no
need to bother with the two for loop because code execution won't enter
them ever.
Here, remove those unneeded codes in !NUMA version of build_zonelists().
Link: https://lkml.kernel.org/r/20240326061134.1055295-5-bhe@xxxxxxxxxx
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: "Mike Rapoport (IBM)" <rppt@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 21 ---------------------
1 file changed, 21 deletions(-)
--- a/mm/page_alloc.c~mm-page_allocc-remove-unneeded-codes-in-numa-version-of-build_zonelists
+++ a/mm/page_alloc.c
@@ -5295,27 +5295,6 @@ static void build_zonelists(pg_data_t *p
nr_zones = build_zonerefs_node(pgdat, zonerefs);
zonerefs += nr_zones;
- /*
- * Now we build the zonelist so that it contains the zones
- * of all the other nodes.
- * We don't want to pressure a particular node, so when
- * building the zones for node N, we make sure that the
- * zones coming right after the local ones are those from
- * node N+1 (modulo N)
- */
- for (node = local_node + 1; node < MAX_NUMNODES; node++) {
- if (!node_online(node))
- continue;
- nr_zones = build_zonerefs_node(NODE_DATA(node), zonerefs);
- zonerefs += nr_zones;
- }
- for (node = 0; node < local_node; node++) {
- if (!node_online(node))
- continue;
- nr_zones = build_zonerefs_node(NODE_DATA(node), zonerefs);
- zonerefs += nr_zones;
- }
-
zonerefs->zone = NULL;
zonerefs->zone_idx = 0;
}
_
Patches currently in -mm which might be from bhe@xxxxxxxxxx are
mm-vmallocc-optimize-to-reduce-arguments-of-alloc_vmap_area.patch
x86-remove-unneeded-memblock_find_dma_reserve.patch
mm-mm_initc-remove-the-useless-dma_reserve.patch
mm-mm_initc-add-new-function-calc_nr_all_pages.patch
mm-mm_initc-remove-meaningless-calculation-of-zone-managed_pages-in-free_area_init_core.patch
mm-mm_initc-remove-unneeded-calc_memmap_size.patch
mm-mm_initc-remove-arch_reserved_kernel_pages.patch
mm-move-array-mem_section-init-code-out-of-memory_present.patch
mm-init-remove-the-unnecessary-special-treatment-for-memory-less-node.patch
mm-make-__absent_pages_in_range-as-static.patch
mm-page_allocc-remove-unneeded-codes-in-numa-version-of-build_zonelists.patch
mm-mm_initc-remove-the-outdated-code-comment-above-deferred_grow_zone.patch
mm-page_allocc-dont-show-protection-in-zones-lowmem_reserve-for-empty-zone.patch
mm-page_allocc-change-the-array-length-to-migrate_pcptypes.patch
