The patch titled
Subject: mm/demotion: move memory demotion related code
has been added to the -mm mm-unstable branch. Its filename is
mm-demotion-move-memory-demotion-related-code.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-demotion-move-memory-demotion-related-code.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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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Subject: mm/demotion: move memory demotion related code
Date: Thu, 18 Aug 2022 18:40:34 +0530
This moves memory demotion related code to mm/memory-tiers.c. No
functional change in this patch.
Link: https://lkml.kernel.org/r/20220818131042.113280-3-aneesh.kumar@xxxxxxxxxxxxx
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Reviewed-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Bharata B Rao <bharata@xxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Cc: Hesham Almatary <hesham.almatary@xxxxxxxxxx>
Cc: Jagdish Gediya <jvgediya.oss@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Tim Chen <tim.c.chen@xxxxxxxxx>
Cc: Wei Xu <weixugc@xxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memory-tiers.h | 8 ++++
include/linux/migrate.h | 2 -
mm/memory-tiers.c | 64 +++++++++++++++++++++++++++++++++
mm/migrate.c | 60 ------------------------------
mm/vmscan.c | 1
5 files changed, 74 insertions(+), 61 deletions(-)
--- a/include/linux/memory-tiers.h~mm-demotion-move-memory-demotion-related-code
+++ a/include/linux/memory-tiers.h
@@ -15,4 +15,12 @@
*/
#define MEMTIER_ADISTANCE_DRAM ((4 * MEMTIER_CHUNK_SIZE) + (MEMTIER_CHUNK_SIZE >> 1))
+#ifdef CONFIG_NUMA
+#include <linux/types.h>
+extern bool numa_demotion_enabled;
+
+#else
+
+#define numa_demotion_enabled false
+#endif /* CONFIG_NUMA */
#endif /* _LINUX_MEMORY_TIERS_H */
--- a/include/linux/migrate.h~mm-demotion-move-memory-demotion-related-code
+++ a/include/linux/migrate.h
@@ -103,7 +103,6 @@ static inline int migrate_huge_page_move
#if defined(CONFIG_MIGRATION) && defined(CONFIG_NUMA)
extern void set_migration_target_nodes(void);
extern void migrate_on_reclaim_init(void);
-extern bool numa_demotion_enabled;
extern int next_demotion_node(int node);
#else
static inline void set_migration_target_nodes(void) {}
@@ -112,7 +111,6 @@ static inline int next_demotion_node(int
{
return NUMA_NO_NODE;
}
-#define numa_demotion_enabled false
#endif
#ifdef CONFIG_COMPACTION
--- a/mm/memory-tiers.c~mm-demotion-move-memory-demotion-related-code
+++ a/mm/memory-tiers.c
@@ -3,6 +3,8 @@
#include <linux/nodemask.h>
#include <linux/slab.h>
#include <linux/lockdep.h>
+#include <linux/sysfs.h>
+#include <linux/kobject.h>
#include <linux/memory-tiers.h>
struct memory_tier {
@@ -127,3 +129,65 @@ static int __init memory_tier_init(void)
return 0;
}
subsys_initcall(memory_tier_init);
+
+bool numa_demotion_enabled = false;
+
+#ifdef CONFIG_MIGRATION
+#ifdef CONFIG_SYSFS
+static ssize_t numa_demotion_enabled_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return sysfs_emit(buf, "%s\n",
+ numa_demotion_enabled ? "true" : "false");
+}
+
+static ssize_t numa_demotion_enabled_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ ssize_t ret;
+
+ ret = kstrtobool(buf, &numa_demotion_enabled);
+ if (ret)
+ return ret;
+
+ return count;
+}
+
+static struct kobj_attribute numa_demotion_enabled_attr =
+ __ATTR(demotion_enabled, 0644, numa_demotion_enabled_show,
+ numa_demotion_enabled_store);
+
+static struct attribute *numa_attrs[] = {
+ &numa_demotion_enabled_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group numa_attr_group = {
+ .attrs = numa_attrs,
+};
+
+static int __init numa_init_sysfs(void)
+{
+ int err;
+ struct kobject *numa_kobj;
+
+ numa_kobj = kobject_create_and_add("numa", mm_kobj);
+ if (!numa_kobj) {
+ pr_err("failed to create numa kobject\n");
+ return -ENOMEM;
+ }
+ err = sysfs_create_group(numa_kobj, &numa_attr_group);
+ if (err) {
+ pr_err("failed to register numa group\n");
+ goto delete_obj;
+ }
+ return 0;
+
+delete_obj:
+ kobject_put(numa_kobj);
+ return err;
+}
+subsys_initcall(numa_init_sysfs);
+#endif /* CONFIG_SYSFS */
+#endif
--- a/mm/migrate.c~mm-demotion-move-memory-demotion-related-code
+++ a/mm/migrate.c
@@ -2590,64 +2590,6 @@ void __init migrate_on_reclaim_init(void
set_migration_target_nodes();
cpus_read_unlock();
}
+#endif /* CONFIG_NUMA */
-bool numa_demotion_enabled = false;
-
-#ifdef CONFIG_SYSFS
-static ssize_t numa_demotion_enabled_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- return sysfs_emit(buf, "%s\n",
- numa_demotion_enabled ? "true" : "false");
-}
-
-static ssize_t numa_demotion_enabled_store(struct kobject *kobj,
- struct kobj_attribute *attr,
- const char *buf, size_t count)
-{
- ssize_t ret;
-
- ret = kstrtobool(buf, &numa_demotion_enabled);
- if (ret)
- return ret;
-
- return count;
-}
-
-static struct kobj_attribute numa_demotion_enabled_attr =
- __ATTR(demotion_enabled, 0644, numa_demotion_enabled_show,
- numa_demotion_enabled_store);
-
-static struct attribute *numa_attrs[] = {
- &numa_demotion_enabled_attr.attr,
- NULL,
-};
-
-static const struct attribute_group numa_attr_group = {
- .attrs = numa_attrs,
-};
-
-static int __init numa_init_sysfs(void)
-{
- int err;
- struct kobject *numa_kobj;
-
- numa_kobj = kobject_create_and_add("numa", mm_kobj);
- if (!numa_kobj) {
- pr_err("failed to create numa kobject\n");
- return -ENOMEM;
- }
- err = sysfs_create_group(numa_kobj, &numa_attr_group);
- if (err) {
- pr_err("failed to register numa group\n");
- goto delete_obj;
- }
- return 0;
-delete_obj:
- kobject_put(numa_kobj);
- return err;
-}
-subsys_initcall(numa_init_sysfs);
-#endif /* CONFIG_SYSFS */
-#endif /* CONFIG_NUMA */
--- a/mm/vmscan.c~mm-demotion-move-memory-demotion-related-code
+++ a/mm/vmscan.c
@@ -43,6 +43,7 @@
#include <linux/migrate.h>
#include <linux/delayacct.h>
#include <linux/sysctl.h>
+#include <linux/memory-tiers.h>
#include <linux/oom.h>
#include <linux/pagevec.h>
#include <linux/prefetch.h>
_
Patches currently in -mm which might be from aneesh.kumar@xxxxxxxxxxxxx are
mm-demotion-add-support-for-explicit-memory-tiers.patch
mm-demotion-move-memory-demotion-related-code.patch
mm-demotion-add-hotplug-callbacks-to-handle-new-numa-node-onlined.patch
mm-demotion-dax-kmem-set-nodes-abstract-distance-to-memtier_default_dax_adistance.patch
mm-demotion-build-demotion-targets-based-on-explicit-memory-tiers.patch
mm-demotion-add-pg_data_t-member-to-track-node-memory-tier-details.patch
mm-demotion-drop-memtier-from-memtype.patch
mm-demotion-update-node_is_toptier-to-work-with-memory-tiers.patch
lib-nodemask-optimize-node_random-for-nodemask-with-single-numa-node.patch
