The patch titled
Subject: mm, memory_hotplug: move movable_node to the hotplug proper
has been added to the -mm tree. Its filename is
mm-memory_hotplug-move-movable_node-to-the-hotplug-proper.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memory_hotplug-move-movable_node-to-the-hotplug-proper.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memory_hotplug-move-movable_node-to-the-hotplug-proper.patch
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------------------------------------------------------
From: Michal Hocko <mhocko@xxxxxxxx>
Subject: mm, memory_hotplug: move movable_node to the hotplug proper
movable_node_is_enabled is defined in memblock proper while it is
initialized from the memory hotplug proper. This is quite messy and it
makes a dependency between the two so move movable_node along with the
helper functions to memory_hotplug.
To make it more entertaining the kernel parameter is ignored unless
CONFIG_HAVE_MEMBLOCK_NODE_MAP=y because we do not have the node
information for each memblock otherwise. So let's warn when the option is
disabled.
Link: http://lkml.kernel.org/r/20170529114141.536-4-mhocko@xxxxxxxxxx
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: Reza Arbab <arbab@xxxxxxxxxxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Jerome Glisse <jglisse@xxxxxxxxxx>
Cc: Yasuaki Ishimatsu <yasu.isimatu@xxxxxxxxx>
Cc: Xishi Qiu <qiuxishi@xxxxxxxxxx>
Cc: Kani Toshimitsu <toshi.kani@xxxxxxx>
Cc: Chen Yucong <slaoub@xxxxxxxxx>
Cc: Joonsoo Kim <js1304@xxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
Cc: Igor Mammedov <imammedo@xxxxxxxxxx>
Cc: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memblock.h | 7 -------
include/linux/memory_hotplug.h | 10 ++++++++++
mm/memblock.c | 1 -
mm/memory_hotplug.c | 6 ++++++
4 files changed, 16 insertions(+), 8 deletions(-)
diff -puN include/linux/memblock.h~mm-memory_hotplug-move-movable_node-to-the-hotplug-proper include/linux/memblock.h
--- a/include/linux/memblock.h~mm-memory_hotplug-move-movable_node-to-the-hotplug-proper
+++ a/include/linux/memblock.h
@@ -57,8 +57,6 @@ struct memblock {
extern struct memblock memblock;
extern int memblock_debug;
-/* If movable_node boot option specified */
-extern bool movable_node_enabled;
#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
#define __init_memblock __meminit
@@ -172,11 +170,6 @@ static inline bool memblock_is_hotplugga
return m->flags & MEMBLOCK_HOTPLUG;
}
-static inline bool __init_memblock movable_node_is_enabled(void)
-{
- return movable_node_enabled;
-}
-
static inline bool memblock_is_mirror(struct memblock_region *m)
{
return m->flags & MEMBLOCK_MIRROR;
diff -puN include/linux/memory_hotplug.h~mm-memory_hotplug-move-movable_node-to-the-hotplug-proper include/linux/memory_hotplug.h
--- a/include/linux/memory_hotplug.h~mm-memory_hotplug-move-movable_node-to-the-hotplug-proper
+++ a/include/linux/memory_hotplug.h
@@ -115,6 +115,12 @@ extern void __online_page_free(struct pa
extern int try_online_node(int nid);
extern bool memhp_auto_online;
+/* If movable_node boot option specified */
+extern bool movable_node_enabled;
+static inline bool movable_node_is_enabled(void)
+{
+ return movable_node_enabled;
+}
#ifdef CONFIG_MEMORY_HOTREMOVE
extern bool is_pageblock_removable_nolock(struct page *page);
@@ -266,6 +272,10 @@ static inline void put_online_mems(void)
static inline void mem_hotplug_begin(void) {}
static inline void mem_hotplug_done(void) {}
+static inline bool movable_node_is_enabled(void)
+{
+ return false;
+}
#endif /* ! CONFIG_MEMORY_HOTPLUG */
#ifdef CONFIG_MEMORY_HOTREMOVE
diff -puN mm/memblock.c~mm-memory_hotplug-move-movable_node-to-the-hotplug-proper mm/memblock.c
--- a/mm/memblock.c~mm-memory_hotplug-move-movable_node-to-the-hotplug-proper
+++ a/mm/memblock.c
@@ -54,7 +54,6 @@ struct memblock memblock __initdata_memb
};
int memblock_debug __initdata_memblock;
-bool movable_node_enabled __initdata_memblock = false;
static bool system_has_some_mirror __initdata_memblock = false;
static int memblock_can_resize __initdata_memblock;
static int memblock_memory_in_slab __initdata_memblock = 0;
diff -puN mm/memory_hotplug.c~mm-memory_hotplug-move-movable_node-to-the-hotplug-proper mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~mm-memory_hotplug-move-movable_node-to-the-hotplug-proper
+++ a/mm/memory_hotplug.c
@@ -79,6 +79,8 @@ static struct {
#define memhp_lock_acquire() lock_map_acquire(&mem_hotplug.dep_map)
#define memhp_lock_release() lock_map_release(&mem_hotplug.dep_map)
+bool movable_node_enabled = false;
+
#ifndef CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE
bool memhp_auto_online;
#else
@@ -1559,7 +1561,11 @@ check_pages_isolated(unsigned long start
static int __init cmdline_parse_movable_node(char *p)
{
+#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
movable_node_enabled = true;
+#else
+ pr_warn("movable_node parameter depends on CONFIG_HAVE_MEMBLOCK_NODE_MAP to work properly\n");
+#endif
return 0;
}
early_param("movable_node", cmdline_parse_movable_node);
_
Patches currently in -mm which might be from mhocko@xxxxxxxx are
include-linux-gfph-fix-___gfp_nolockdep-value.patch
mm-clarify-why-we-want-kmalloc-before-falling-backto-vmallock.patch
mm-remove-return-value-from-init_currently_empty_zone.patch
mm-memory_hotplug-use-node-instead-of-zone-in-can_online_high_movable.patch
mm-drop-page_initialized-check-from-get_nid_for_pfn.patch
mm-memory_hotplug-get-rid-of-is_zone_device_section.patch
mm-memory_hotplug-split-up-register_one_node.patch
mm-memory_hotplug-consider-offline-memblocks-removable.patch
mm-consider-zone-which-is-not-fully-populated-to-have-holes.patch
mm-consider-zone-which-is-not-fully-populated-to-have-holes-fix.patch
mm-compaction-skip-over-holes-in-__reset_isolation_suitable.patch
mm-__first_valid_page-skip-over-offline-pages.patch
mm-vmstat-skip-reporting-offline-pages-in-pagetypeinfo.patch
mm-vmstat-skip-reporting-offline-pages-in-pagetypeinfo-fix.patch
mm-memory_hotplug-do-not-associate-hotadded-memory-to-zones-until-online.patch
mm-memory_hotplug-replace-for_device-by-want_memblock-in-arch_add_memory.patch
mm-memory_hotplug-fix-the-section-mismatch-warning.patch
mm-memory_hotplug-remove-unused-cruft-after-memory-hotplug-rework.patch
mm-adaptive-hash-table-scaling-fix.patch
mm-memory_hotplug-drop-artificial-restriction-on-online-offline.patch
mm-memory_hotplug-drop-config_movable_node.patch
mm-memory_hotplug-move-movable_node-to-the-hotplug-proper.patch
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