[to-be-updated] mm-vmscan-fix-node-reclaim-ignoring-swappiness-parameter.patch removed from -mm tree

The quilt patch titled
     Subject: mm: vmscan: fix node reclaim ignoring swappiness parameter
has been removed from the -mm tree.  Its filename was
     mm-vmscan-fix-node-reclaim-ignoring-swappiness-parameter.patch

This patch was dropped because an updated version will be issued

------------------------------------------------------
From: Ridong Chen <[email protected]>
Subject: mm: vmscan: fix node reclaim ignoring swappiness parameter
Date: Thu, 16 Jul 2026 11:17:29 +0800

sc_swappiness() had two separate definitions depending on CONFIG_MEMCG. 
The !CONFIG_MEMCG variant simply returned vm_swappiness, ignoring the
proactive_swappiness value passed through scan_control.  This caused the
swappiness parameter written to /sys/devices/system/node/nodeX/reclaim to
have no effect when CONFIG_MEMCG is disabled.

Fix this by consolidating sc_swappiness() into a single definition that
checks sc->proactive_swappiness first, then falls back to
mem_cgroup_swappiness() which already handles both CONFIG_MEMCG and
!CONFIG_MEMCG.

Before fix (swappiness=max ignored, mostly file pages reclaimed):

    # cat /proc/sys/vm/swappiness
    60
    # cat /proc/vmstat | grep pgsteal
    pgsteal_kswapd 0
    pgsteal_direct 0
    pgsteal_khugepaged 0
    pgsteal_proactive 1840
    pgsteal_anon 25
    pgsteal_file 1815
    # echo "64M swappiness=max" > /sys/devices/system/node/node0/reclaim
    # cat /proc/vmstat | grep pgsteal
    pgsteal_kswapd 0
    pgsteal_direct 0
    pgsteal_khugepaged 0
    pgsteal_proactive 18013
    pgsteal_anon 337
    pgsteal_file 17676

After fix (swappiness=max honored, anon pages reclaimed as expected):

    # cat /proc/vmstat | grep pgsteal
    pgsteal_kswapd 0
    pgsteal_direct 0
    pgsteal_khugepaged 0
    pgsteal_proactive 0
    pgsteal_anon 0
    pgsteal_file 0
    # echo "64M swappiness=max" > /sys/devices/system/node/node0/reclaim
    # cat /proc/vmstat | grep pgsteal
    pgsteal_kswapd 0
    pgsteal_direct 0
    pgsteal_khugepaged 0
    pgsteal_proactive 16283
    pgsteal_anon 16283
    pgsteal_file 0

Link: https://lore.kernel.org/[email protected]
Fixes: b980077899ea ("mm: introduce per-node proactive reclaim interface")
Signed-off-by: Ridong Chen <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Reviewed-by: Barry Song <[email protected]>
Acked-by: Qi Zheng <[email protected]>
Tested-by: Song Hu <[email protected]>
Reviewed-by: Song Hu <[email protected]>
Cc: Axel Rasmussen <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Chris Li <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: Kairui Song <[email protected]>
Cc: Kemeng Shi <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Nhat Pham <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Shakeel Butt <[email protected]>
Cc: Wei Xu <[email protected]>
Cc: Yuanchu Xie <[email protected]>
Cc: <[email protected]>	[6.17+]
Signed-off-by: Andrew Morton <[email protected]>
---

 mm/vmscan.c |   19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

--- a/mm/vmscan.c~mm-vmscan-fix-node-reclaim-ignoring-swappiness-parameter
+++ a/mm/vmscan.c
@@ -199,6 +199,13 @@ struct scan_control {
  */
 int vm_swappiness = 60;
 
+static int sc_swappiness(struct scan_control *sc, struct mem_cgroup *memcg)
+{
+	if (sc->proactive && sc->proactive_swappiness)
+		return *sc->proactive_swappiness;
+	return mem_cgroup_swappiness(memcg);
+}
+
 #ifdef CONFIG_MEMCG
 
 /* Returns true for reclaim through cgroup limits or cgroup interfaces. */
@@ -239,13 +246,6 @@ static bool writeback_throttling_sane(st
 #endif
 	return false;
 }
-
-static int sc_swappiness(struct scan_control *sc, struct mem_cgroup *memcg)
-{
-	if (sc->proactive && sc->proactive_swappiness)
-		return *sc->proactive_swappiness;
-	return mem_cgroup_swappiness(memcg);
-}
 #else
 static bool cgroup_reclaim(struct scan_control *sc)
 {
@@ -261,11 +261,6 @@ static bool writeback_throttling_sane(st
 {
 	return true;
 }
-
-static int sc_swappiness(struct scan_control *sc, struct mem_cgroup *memcg)
-{
-	return READ_ONCE(vm_swappiness);
-}
 #endif
 
 static inline bool is_exec_file_folio(const struct folio *folio,
_

Patches currently in -mm which might be from [email protected] are

mm-vmscan-fix-anon-only-reclaim-evicting-file-pages-when-swappiness=max.patch
mm-vmscan-propagate-real-error-code-from-per-node-proactive-reclaim.patch
mm-vmscan-drop-unused-gfp_mask-parameter-from-__node_reclaim.patch