The patch titled
Subject: mm/mm_init.c: remove reset_node_present_pages()
has been added to the -mm mm-unstable branch. Its filename is
mm-mm_initc-remove-reset_node_present_pages.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mm_initc-remove-reset_node_present_pages.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: Haifeng Xu <haifeng.xu@xxxxxxxxxx>
Subject: mm/mm_init.c: remove reset_node_present_pages()
Date: Thu, 1 Jun 2023 16:26:26 +0000
reset_node_present_pages() only get called in hotadd_init_pgdat(), move
the action that clear present pages to free_area_init_core_hotplug(), so
the helper can be removed.
Link: https://lkml.kernel.org/r/20230601162626.1030-2-haifeng.xu@xxxxxxxxxx
Signed-off-by: Haifeng Xu <haifeng.xu@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory_hotplug.c | 18 ------------------
mm/mm_init.c | 14 ++++++++++++--
2 files changed, 12 insertions(+), 20 deletions(-)
--- a/mm/memory_hotplug.c~mm-mm_initc-remove-reset_node_present_pages
+++ a/mm/memory_hotplug.c
@@ -1172,16 +1172,6 @@ failed_addition:
return ret;
}
-static void reset_node_present_pages(pg_data_t *pgdat)
-{
- struct zone *z;
-
- for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
- z->present_pages = 0;
-
- pgdat->node_present_pages = 0;
-}
-
/* we are OK calling __meminit stuff here - we have CONFIG_MEMORY_HOTPLUG */
static pg_data_t __ref *hotadd_init_pgdat(int nid)
{
@@ -1204,14 +1194,6 @@ static pg_data_t __ref *hotadd_init_pgda
*/
build_all_zonelists(pgdat);
- /*
- * When memory is hot-added, all the memory is in offline state. So
- * clear all zones' present_pages because they will be updated in
- * online_pages() and offline_pages().
- * TODO: should be in free_area_init_core_hotplug?
- */
- reset_node_present_pages(pgdat);
-
return pgdat;
}
--- a/mm/mm_init.c~mm-mm_initc-remove-reset_node_present_pages
+++ a/mm/mm_init.c
@@ -1497,6 +1497,7 @@ void __ref free_area_init_core_hotplug(s
{
int nid = pgdat->node_id;
enum zone_type z;
+ struct zone *zone;
int cpu;
pgdat_init_internals(pgdat);
@@ -1513,6 +1514,8 @@ void __ref free_area_init_core_hotplug(s
pgdat->kswapd_order = 0;
pgdat->kswapd_highest_zoneidx = 0;
pgdat->node_start_pfn = 0;
+ pgdat->node_present_pages = 0;
+
for_each_online_cpu(cpu) {
struct per_cpu_nodestat *p;
@@ -1520,8 +1523,15 @@ void __ref free_area_init_core_hotplug(s
memset(p, 0, sizeof(*p));
}
- for (z = 0; z < MAX_NR_ZONES; z++)
- zone_init_internals(&pgdat->node_zones[z], z, nid, 0);
+ /* When memory is hot-added, all the memory is in offline state. So
+ * clear all zones' present_pages and managed_pages because they will
+ * be updated in online_pages() and offline_pages().
+ */
+ for (z = 0; z < MAX_NR_ZONES; z++) {
+ zone = &pgdat->node_zones[z];
+ zone->present_pages = 0;
+ zone_init_internals(zone, z, nid, 0);
+ }
}
#endif
_
Patches currently in -mm which might be from haifeng.xu@xxxxxxxxxx are
memcg-oom-remove-unnecessary-check-in-mem_cgroup_oom_synchronize.patch
memcg-oom-remove-explicit-wakeup-in-mem_cgroup_oom_synchronize.patch
mm-oom-do-not-check-0-mask-in-out_of_memory.patch
mm-memcontrol-fix-typo-in-comment.patch
selftests-cgroup-fix-unexpected-failure-on-test_memcg_low.patch
mm-mm_initc-introduce-reset_memoryless_node_totalpages.patch
mm-mm_initc-do-not-calculate-zone_start_pfn-zone_end_pfn-in-zone_absent_pages_in_node.patch
mm-mm_initc-remove-free_area_init_memoryless_node.patch
mm-mm_initc-move-set_pageblock_order-to-free_area_init.patch
mm-memory_hotplug-remove-reset_node_managed_pages-in-hotadd_init_pgdat.patch
mm-mm_initc-remove-reset_node_present_pages.patch
fork-optimize-memcg_charge_kernel_stack-a-bit.patch
