The patch titled
Subject: mm/memory_hotplug: track present pages in memory groups
has been removed from the -mm tree. Its filename was
mm-memory_hotplug-track-present-pages-in-memory-groups.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: mm/memory_hotplug: track present pages in memory groups
Let's track all present pages in each memory group. Especially, track
memory present in ZONE_MOVABLE and memory present in one of the kernel
zones (which really only is ZONE_NORMAL right now as memory groups only
apply to hotplugged memory) separately within a memory group, to prepare
for making smart auto-online decision for individual memory blocks within
a memory group based on group statistics.
Link: https://lkml.kernel.org/r/20210806124715.17090-5-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Hui Zhu <teawater@xxxxxxxxx>
Cc: Jason Wang <jasowang@xxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Marek Kedzierski <mkedzier@xxxxxxxxxx>
Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>
Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/base/memory.c | 10 +++++-----
include/linux/memory.h | 6 ++++++
include/linux/memory_hotplug.h | 13 +++++++++----
mm/memory_hotplug.c | 19 ++++++++++++++-----
4 files changed, 34 insertions(+), 14 deletions(-)
--- a/drivers/base/memory.c~mm-memory_hotplug-track-present-pages-in-memory-groups
+++ a/drivers/base/memory.c
@@ -198,7 +198,7 @@ static int memory_block_online(struct me
}
ret = online_pages(start_pfn + nr_vmemmap_pages,
- nr_pages - nr_vmemmap_pages, zone);
+ nr_pages - nr_vmemmap_pages, zone, mem->group);
if (ret) {
if (nr_vmemmap_pages)
mhp_deinit_memmap_on_memory(start_pfn, nr_vmemmap_pages);
@@ -210,7 +210,7 @@ static int memory_block_online(struct me
* now already properly populated.
*/
if (nr_vmemmap_pages)
- adjust_present_page_count(pfn_to_page(start_pfn),
+ adjust_present_page_count(pfn_to_page(start_pfn), mem->group,
nr_vmemmap_pages);
return ret;
@@ -228,16 +228,16 @@ static int memory_block_offline(struct m
* can properly be torn down in offline_pages().
*/
if (nr_vmemmap_pages)
- adjust_present_page_count(pfn_to_page(start_pfn),
+ adjust_present_page_count(pfn_to_page(start_pfn), mem->group,
-nr_vmemmap_pages);
ret = offline_pages(start_pfn + nr_vmemmap_pages,
- nr_pages - nr_vmemmap_pages);
+ nr_pages - nr_vmemmap_pages, mem->group);
if (ret) {
/* offline_pages() failed. Account back. */
if (nr_vmemmap_pages)
adjust_present_page_count(pfn_to_page(start_pfn),
- nr_vmemmap_pages);
+ mem->group, nr_vmemmap_pages);
return ret;
}
--- a/include/linux/memory.h~mm-memory_hotplug-track-present-pages-in-memory-groups
+++ a/include/linux/memory.h
@@ -27,6 +27,10 @@
* struct memory_group - a logical group of memory blocks
* @nid: The node id for all memory blocks inside the memory group.
* @blocks: List of all memory blocks belonging to this memory group.
+ * @present_kernel_pages: Present (online) memory outside ZONE_MOVABLE of this
+ * memory group.
+ * @present_movable_pages: Present (online) memory in ZONE_MOVABLE of this
+ * memory group.
* @is_dynamic: The memory group type: static vs. dynamic
* @s.max_pages: Valid with &memory_group.is_dynamic == false. The maximum
* number of pages we'll have in this static memory group.
@@ -48,6 +52,8 @@
struct memory_group {
int nid;
struct list_head memory_blocks;
+ unsigned long present_kernel_pages;
+ unsigned long present_movable_pages;
bool is_dynamic;
union {
struct {
--- a/include/linux/memory_hotplug.h~mm-memory_hotplug-track-present-pages-in-memory-groups
+++ a/include/linux/memory_hotplug.h
@@ -12,6 +12,7 @@ struct zone;
struct pglist_data;
struct mem_section;
struct memory_block;
+struct memory_group;
struct resource;
struct vmem_altmap;
@@ -100,13 +101,15 @@ static inline void zone_seqlock_init(str
extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages);
extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages);
extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);
-extern void adjust_present_page_count(struct page *page, long nr_pages);
+extern void adjust_present_page_count(struct page *page,
+ struct memory_group *group,
+ long nr_pages);
/* VM interface that may be used by firmware interface */
extern int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages,
struct zone *zone);
extern void mhp_deinit_memmap_on_memory(unsigned long pfn, unsigned long nr_pages);
extern int online_pages(unsigned long pfn, unsigned long nr_pages,
- struct zone *zone);
+ struct zone *zone, struct memory_group *group);
extern struct zone *test_pages_in_a_zone(unsigned long start_pfn,
unsigned long end_pfn);
extern void __offline_isolated_pages(unsigned long start_pfn,
@@ -296,7 +299,8 @@ static inline void pgdat_resize_init(str
#ifdef CONFIG_MEMORY_HOTREMOVE
extern void try_offline_node(int nid);
-extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
+extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages,
+ struct memory_group *group);
extern int remove_memory(u64 start, u64 size);
extern void __remove_memory(u64 start, u64 size);
extern int offline_and_remove_memory(u64 start, u64 size);
@@ -304,7 +308,8 @@ extern int offline_and_remove_memory(u64
#else
static inline void try_offline_node(int nid) {}
-static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages)
+static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages,
+ struct memory_group *group)
{
return -EINVAL;
}
--- a/mm/memory_hotplug.c~mm-memory_hotplug-track-present-pages-in-memory-groups
+++ a/mm/memory_hotplug.c
@@ -915,9 +915,11 @@ struct zone *zone_for_pfn_range(int onli
* This function should only be called by memory_block_{online,offline},
* and {online,offline}_pages.
*/
-void adjust_present_page_count(struct page *page, long nr_pages)
+void adjust_present_page_count(struct page *page, struct memory_group *group,
+ long nr_pages)
{
struct zone *zone = page_zone(page);
+ const bool movable = zone_idx(zone) == ZONE_MOVABLE;
/*
* We only support onlining/offlining/adding/removing of complete
@@ -927,6 +929,11 @@ void adjust_present_page_count(struct pa
zone->present_early_pages += nr_pages;
zone->present_pages += nr_pages;
zone->zone_pgdat->node_present_pages += nr_pages;
+
+ if (group && movable)
+ group->present_movable_pages += nr_pages;
+ else if (group && !movable)
+ group->present_kernel_pages += nr_pages;
}
int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages,
@@ -972,7 +979,8 @@ void mhp_deinit_memmap_on_memory(unsigne
kasan_remove_zero_shadow(__va(PFN_PHYS(pfn)), PFN_PHYS(nr_pages));
}
-int __ref online_pages(unsigned long pfn, unsigned long nr_pages, struct zone *zone)
+int __ref online_pages(unsigned long pfn, unsigned long nr_pages,
+ struct zone *zone, struct memory_group *group)
{
unsigned long flags;
int need_zonelists_rebuild = 0;
@@ -1025,7 +1033,7 @@ int __ref online_pages(unsigned long pfn
}
online_pages_range(pfn, nr_pages);
- adjust_present_page_count(pfn_to_page(pfn), nr_pages);
+ adjust_present_page_count(pfn_to_page(pfn), group, nr_pages);
node_states_set_node(nid, &arg);
if (need_zonelists_rebuild)
@@ -1769,7 +1777,8 @@ static int count_system_ram_pages_cb(uns
return 0;
}
-int __ref offline_pages(unsigned long start_pfn, unsigned long nr_pages)
+int __ref offline_pages(unsigned long start_pfn, unsigned long nr_pages,
+ struct memory_group *group)
{
const unsigned long end_pfn = start_pfn + nr_pages;
unsigned long pfn, system_ram_pages = 0;
@@ -1905,7 +1914,7 @@ int __ref offline_pages(unsigned long st
/* removal success */
adjust_managed_page_count(pfn_to_page(start_pfn), -nr_pages);
- adjust_present_page_count(pfn_to_page(start_pfn), -nr_pages);
+ adjust_present_page_count(pfn_to_page(start_pfn), group, -nr_pages);
/* reinitialise watermarks and update pcp limits */
init_per_zone_wmark_min();
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
