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mm/memory_hotplug: track present pages in memory groups

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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@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hui Zhu <teawater@gmail.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Marek Kedzierski <mkedzier@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Hildenbrand 2021-09-07 19:55:30 -07:00 committed by Linus Torvalds
parent 028fc57a1c
commit 836809ec75
4 changed files with 34 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/base/memory.c
View File

@ -198,7 +198,7 @@ static int memory_block_online(struct memory_block *mem)
}
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 memory_block *mem)
* 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 memory_block *mem)
* 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;
}

6
include/linux/memory.h
View File

@ -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 {

13
include/linux/memory_hotplug.h
View File

@ -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(struct zone *zone)
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(struct pglist_data *pgdat) {}
#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 start, u64 size);
#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;
}

19
mm/memory_hotplug.c
View File

@ -915,9 +915,11 @@ struct zone *zone_for_pfn_range(int online_type, int nid,
* 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 page *page, long nr_pages)
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(unsigned long pfn, unsigned long nr_pages)
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, unsigned long nr_pages, struct zone *z
}
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(unsigned long start_pfn,
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 start_pfn, unsigned long nr_pages)
/* 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();