The patch titled
Subject: mm/vmstat: move pgdemote_* out of CONFIG_NUMA_BALANCING
has been added to the -mm mm-unstable branch. Its filename is
mm-vmstat-move-pgdemote_-out-of-config_numa_balancing.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmstat-move-pgdemote_-out-of-config_numa_balancing.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: Li Zhijian <lizhijian@xxxxxxxxxxx>
Subject: mm/vmstat: move pgdemote_* out of CONFIG_NUMA_BALANCING
Date: Fri, 29 Dec 2023 10:26:51 +0800
Demotion can work well without CONFIG_NUMA_BALANCING. But the commit
23e9f0138963 ("mm/vmstat: move pgdemote_* to per-node stats") wrongly hid
it behind CONFIG_NUMA_BALANCING.
Fix it by moving them out of CONFIG_NUMA_BALANCING.
Link: https://lkml.kernel.org/r/20231229022651.3229174-1-lizhijian@xxxxxxxxxxx
Fixes: 23e9f0138963 ("mm/vmstat: move pgdemote_* to per-node stats")
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mmzone.h | 2 +-
mm/vmscan.c | 5 +----
mm/vmstat.c | 2 +-
3 files changed, 3 insertions(+), 6 deletions(-)
--- a/include/linux/mmzone.h~mm-vmstat-move-pgdemote_-out-of-config_numa_balancing
+++ a/include/linux/mmzone.h
@@ -209,11 +209,11 @@ enum node_stat_item {
#ifdef CONFIG_NUMA_BALANCING
PGPROMOTE_SUCCESS, /* promote successfully */
PGPROMOTE_CANDIDATE, /* candidate pages to promote */
+#endif
/* PGDEMOTE_*: pages demoted */
PGDEMOTE_KSWAPD,
PGDEMOTE_DIRECT,
PGDEMOTE_KHUGEPAGED,
-#endif
NR_VM_NODE_STAT_ITEMS
};
--- a/mm/vmscan.c~mm-vmstat-move-pgdemote_-out-of-config_numa_balancing
+++ a/mm/vmscan.c
@@ -409,12 +409,10 @@ void drop_slab(void)
static int reclaimer_offset(void)
{
-#ifdef CONFIG_NUMA_BALANCING
BUILD_BUG_ON(PGSTEAL_DIRECT - PGSTEAL_KSWAPD !=
PGDEMOTE_DIRECT - PGDEMOTE_KSWAPD);
BUILD_BUG_ON(PGSTEAL_KHUGEPAGED - PGSTEAL_KSWAPD !=
PGDEMOTE_KHUGEPAGED - PGDEMOTE_KSWAPD);
-#endif
BUILD_BUG_ON(PGSTEAL_DIRECT - PGSTEAL_KSWAPD !=
PGSCAN_DIRECT - PGSCAN_KSWAPD);
BUILD_BUG_ON(PGSTEAL_KHUGEPAGED - PGSTEAL_KSWAPD !=
@@ -978,10 +976,9 @@ static unsigned int demote_folio_list(st
migrate_pages(demote_folios, alloc_demote_folio, NULL,
(unsigned long)&mtc, MIGRATE_ASYNC, MR_DEMOTION,
&nr_succeeded);
-#ifdef CONFIG_NUMA_BALANCING
+
mod_node_page_state(pgdat, PGDEMOTE_KSWAPD + reclaimer_offset(),
nr_succeeded);
-#endif
return nr_succeeded;
}
--- a/mm/vmstat.c~mm-vmstat-move-pgdemote_-out-of-config_numa_balancing
+++ a/mm/vmstat.c
@@ -1248,10 +1248,10 @@ const char * const vmstat_text[] = {
#ifdef CONFIG_NUMA_BALANCING
"pgpromote_success",
"pgpromote_candidate",
+#endif
"pgdemote_kswapd",
"pgdemote_direct",
"pgdemote_khugepaged",
-#endif
/* enum writeback_stat_item counters */
"nr_dirty_threshold",
_
Patches currently in -mm which might be from lizhijian@xxxxxxxxxxx are
mm-vmstat-move-pgdemote_-out-of-config_numa_balancing.patch
