The patch titled
Subject: mm/memory_hotplug: track present pages in memory groups
has been added to the -mm tree. Its filename is
mm-memory_hotplug-track-present-pages-in-memory-groups.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-memory_hotplug-track-present-pages-in-memory-groups.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-memory_hotplug-track-present-pages-in-memory-groups.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
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/20210723125210.29987-5-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 | 4 ++++
include/linux/memory_hotplug.h | 13 +++++++++----
mm/memory_hotplug.c | 19 ++++++++++++++-----
4 files changed, 32 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
@@ -28,6 +28,10 @@ struct memory_group {
int nid;
/* References from memory blocks + 1. */
refcount_t refcount;
+ /* Present (online) memory outside ZONE_MOVABLE of this memory group. */
+ unsigned long present_kernel_pages;
+ /* Present (online) memory in ZONE_MOVABLE of this memory group. */
+ unsigned long present_movable_pages;
/*
* Memory group type: static vs. dynamic.
*
--- 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;
@@ -99,13 +100,15 @@ 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,
@@ -295,7 +298,8 @@ 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);
@@ -303,7 +307,8 @@ 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
@@ -913,9 +913,11 @@ 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
@@ -925,6 +927,11 @@ 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,
@@ -970,7 +977,8 @@ 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;
@@ -1023,7 +1031,7 @@ 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)
@@ -1767,7 +1775,8 @@ 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;
@@ -1903,7 +1912,7 @@ 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
memory-hotplugrst-remove-locking-details-from-admin-guide.patch
memory-hotplugrst-complete-admin-guide-overhaul.patch
mm-memory_hotplug-use-unsigned-long-for-pfn-in-zone_for_pfn_range.patch
mm-memory_hotplug-remove-nid-parameter-from-arch_remove_memory.patch
mm-memory_hotplug-remove-nid-parameter-from-remove_memory-and-friends.patch
acpi-memhotplug-memory-resources-cannot-be-enabled-yet.patch
mm-track-present-early-pages-per-zone.patch
mm-memory_hotplug-introduce-auto-movable-online-policy.patch
drivers-base-memory-introduce-memory-groups-to-logically-group-memory-blocks.patch
mm-memory_hotplug-track-present-pages-in-memory-groups.patch
acpi-memhotplug-use-a-single-static-memory-group-for-a-single-memory-device.patch
dax-kmem-use-a-single-static-memory-group-for-a-single-probed-unit.patch
virtio-mem-use-a-single-dynamic-memory-group-for-a-single-virtio-mem-device.patch
mm-memory_hotplug-memory-group-aware-auto-movable-online-policy.patch
mm-memory_hotplug-improved-dynamic-memory-group-aware-auto-movable-online-policy.patch
