[merged] memcg-do-not-tweak-node-in-alloc_mem_cgroup_per_node_info.patch removed from -mm tree

[merged] memcg-do-not-tweak-node-in-alloc_mem_cgroup_per_node_info.patch removed from -mm tree

[Andrew Morton]

The patch titled
     Subject: memcg: do not tweak node in alloc_mem_cgroup_per_node_info
has been removed from the -mm tree.  Its filename was
     memcg-do-not-tweak-node-in-alloc_mem_cgroup_per_node_info.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: Wei Yang <richard.weiyang@gmail.com>
Subject: memcg: do not tweak node in alloc_mem_cgroup_per_node_info

alloc_mem_cgroup_per_node_info is allocated for each possible node and
this used to be a problem because !node_online nodes didn't have
appropriate data structure allocated.  This has changed by "mm: handle
uninitialized numa nodes gracefully" so we can drop the special casing
here.

Link: https://lkml.kernel.org/r/20220127085305.20890-7-mhocko@kernel.org
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Michal Hocko <mhocko@suse.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Alexey Makhalov <amakhalov@vmware.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Rafael Aquini <raquini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memcontrol.c |   14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

--- a/mm/memcontrol.c~memcg-do-not-tweak-node-in-alloc_mem_cgroup_per_node_info
+++ a/mm/memcontrol.c
@@ -5020,18 +5020,8 @@ struct mem_cgroup *mem_cgroup_from_id(un
 static int alloc_mem_cgroup_per_node_info(struct mem_cgroup *memcg, int node)
 {
 	struct mem_cgroup_per_node *pn;
-	int tmp = node;
-	/*
-	 * This routine is called against possible nodes.
-	 * But it's BUG to call kmalloc() against offline node.
-	 *
-	 * TODO: this routine can waste much memory for nodes which will
-	 *       never be onlined. It's better to use memory hotplug callback
-	 *       function.
-	 */
-	if (!node_state(node, N_NORMAL_MEMORY))
-		tmp = -1;
-	pn = kzalloc_node(sizeof(*pn), GFP_KERNEL, tmp);
+
+	pn = kzalloc_node(sizeof(*pn), GFP_KERNEL, node);
 	if (!pn)
 		return 1;
 
_

Patches currently in -mm which might be from richard.weiyang@gmail.com are

mm-page_alloc-add-same-penalty-is-enough-to-get-round-robin-order.patch
mm-page_alloc-add-penalty-to-local_node.patch