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List: linux-mm
Subject: [PATCH v2 2/2] mm: memcontrol: account pagetables per node
From: Shakeel Butt <shakeelb () google ! com>
Date: 2020-11-30 21:25:41
Message-ID: 20201130212541.2781790-3-shakeelb () google ! com
[Download RAW message or body]
For many workloads, pagetable consumption is significant and it makes
sense to expose it in the memory.stat for the memory cgroups. However at
the moment, the pagetables are accounted per-zone. Converting them to
per-node and using the right interface will correctly account for the
memory cgroups as well.
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Roman Gushchin <guro@fb.com>
---
Changes since v1:
- Fixes vmstat_text in vmstat.c based on Johannes's comment.
Documentation/admin-guide/cgroup-v2.rst | 3 +++
arch/nds32/mm/mm-nds32.c | 6 +++---
drivers/base/node.c | 2 +-
fs/proc/meminfo.c | 2 +-
include/linux/mm.h | 8 ++++----
include/linux/mmzone.h | 2 +-
mm/memcontrol.c | 1 +
mm/page_alloc.c | 6 +++---
mm/vmstat.c | 2 +-
9 files changed, 18 insertions(+), 14 deletions(-)
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 515bb13084a0..63521cd36ce5 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1274,6 +1274,9 @@ PAGE_SIZE multiple when read back.
kernel_stack
Amount of memory allocated to kernel stacks.
+ pagetables
+ Amount of memory allocated for page tables.
+
percpu(npn)
Amount of memory used for storing per-cpu kernel
data structures.
diff --git a/arch/nds32/mm/mm-nds32.c b/arch/nds32/mm/mm-nds32.c
index 55bec50ccc03..f2778f2b39f6 100644
--- a/arch/nds32/mm/mm-nds32.c
+++ b/arch/nds32/mm/mm-nds32.c
@@ -34,8 +34,8 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
cpu_dcache_wb_range((unsigned long)new_pgd,
(unsigned long)new_pgd +
PTRS_PER_PGD * sizeof(pgd_t));
- inc_zone_page_state(virt_to_page((unsigned long *)new_pgd),
- NR_PAGETABLE);
+ inc_lruvec_page_state(virt_to_page((unsigned long *)new_pgd),
+ NR_PAGETABLE);
return new_pgd;
}
@@ -59,7 +59,7 @@ void pgd_free(struct mm_struct *mm, pgd_t * pgd)
pte = pmd_page(*pmd);
pmd_clear(pmd);
- dec_zone_page_state(virt_to_page((unsigned long *)pgd), NR_PAGETABLE);
+ dec_lruvec_page_state(virt_to_page((unsigned long *)pgd), NR_PAGETABLE);
pte_free(mm, pte);
mm_dec_nr_ptes(mm);
pmd_free(mm, pmd);
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 6ffa470e2984..04f71c7bc3f8 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -450,7 +450,7 @@ static ssize_t node_read_meminfo(struct device *dev,
#ifdef CONFIG_SHADOW_CALL_STACK
nid, node_page_state(pgdat, NR_KERNEL_SCS_KB),
#endif
- nid, K(sum_zone_node_page_state(nid, NR_PAGETABLE)),
+ nid, K(node_page_state(pgdat, NR_PAGETABLE)),
nid, 0UL,
nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)),
nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)),
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 887a5532e449..d6fc74619625 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -107,7 +107,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
global_node_page_state(NR_KERNEL_SCS_KB));
#endif
show_val_kb(m, "PageTables: ",
- global_zone_page_state(NR_PAGETABLE));
+ global_node_page_state(NR_PAGETABLE));
show_val_kb(m, "NFS_Unstable: ", 0);
show_val_kb(m, "Bounce: ",
diff --git a/include/linux/mm.h b/include/linux/mm.h
index eabe7d9f80d8..d1f64744ace2 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2199,7 +2199,7 @@ static inline bool pgtable_pte_page_ctor(struct page *page)
if (!ptlock_init(page))
return false;
__SetPageTable(page);
- inc_zone_page_state(page, NR_PAGETABLE);
+ inc_lruvec_page_state(page, NR_PAGETABLE);
return true;
}
@@ -2207,7 +2207,7 @@ static inline void pgtable_pte_page_dtor(struct page *page)
{
ptlock_free(page);
__ClearPageTable(page);
- dec_zone_page_state(page, NR_PAGETABLE);
+ dec_lruvec_page_state(page, NR_PAGETABLE);
}
#define pte_offset_map_lock(mm, pmd, address, ptlp) \
@@ -2294,7 +2294,7 @@ static inline bool pgtable_pmd_page_ctor(struct page *page)
if (!pmd_ptlock_init(page))
return false;
__SetPageTable(page);
- inc_zone_page_state(page, NR_PAGETABLE);
+ inc_lruvec_page_state(page, NR_PAGETABLE);
return true;
}
@@ -2302,7 +2302,7 @@ static inline void pgtable_pmd_page_dtor(struct page *page)
{
pmd_ptlock_free(page);
__ClearPageTable(page);
- dec_zone_page_state(page, NR_PAGETABLE);
+ dec_lruvec_page_state(page, NR_PAGETABLE);
}
/*
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 15132adaa233..b593316bff3d 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -151,7 +151,6 @@ enum zone_stat_item {
NR_ZONE_UNEVICTABLE,
NR_ZONE_WRITE_PENDING, /* Count of dirty, writeback and unstable pages */
NR_MLOCK, /* mlock()ed pages found and moved off LRU */
- NR_PAGETABLE, /* used for pagetables */
/* Second 128 byte cacheline */
NR_BOUNCE,
#if IS_ENABLED(CONFIG_ZSMALLOC)
@@ -206,6 +205,7 @@ enum node_stat_item {
#if IS_ENABLED(CONFIG_SHADOW_CALL_STACK)
NR_KERNEL_SCS_KB, /* measured in KiB */
#endif
+ NR_PAGETABLE, /* used for pagetables */
NR_VM_NODE_STAT_ITEMS
};
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 8b9352ddff0b..b80328f52fb4 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1519,6 +1519,7 @@ static struct memory_stat memory_stats[] = {
{ "anon", PAGE_SIZE, NR_ANON_MAPPED },
{ "file", PAGE_SIZE, NR_FILE_PAGES },
{ "kernel_stack", 1024, NR_KERNEL_STACK_KB },
+ { "pagetables", PAGE_SIZE, NR_PAGETABLE },
{ "percpu", 1, MEMCG_PERCPU_B },
{ "sock", PAGE_SIZE, MEMCG_SOCK },
{ "shmem", PAGE_SIZE, NR_SHMEM },
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f91df593bf71..df749013f539 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5520,7 +5520,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B),
global_node_page_state(NR_FILE_MAPPED),
global_node_page_state(NR_SHMEM),
- global_zone_page_state(NR_PAGETABLE),
+ global_node_page_state(NR_PAGETABLE),
global_zone_page_state(NR_BOUNCE),
global_zone_page_state(NR_FREE_PAGES),
free_pcp,
@@ -5552,6 +5552,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
#ifdef CONFIG_SHADOW_CALL_STACK
" shadow_call_stack:%lukB"
#endif
+ " pagetables:%lukB"
" all_unreclaimable? %s"
"\n",
pgdat->node_id,
@@ -5577,6 +5578,7 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
#ifdef CONFIG_SHADOW_CALL_STACK
node_page_state(pgdat, NR_KERNEL_SCS_KB),
#endif
+ K(node_page_state(pgdat, NR_PAGETABLE)),
pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES ?
"yes" : "no");
}
@@ -5608,7 +5610,6 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
" present:%lukB"
" managed:%lukB"
" mlocked:%lukB"
- " pagetables:%lukB"
" bounce:%lukB"
" free_pcp:%lukB"
" local_pcp:%ukB"
@@ -5629,7 +5630,6 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
K(zone->present_pages),
K(zone_managed_pages(zone)),
K(zone_page_state(zone, NR_MLOCK)),
- K(zone_page_state(zone, NR_PAGETABLE)),
K(zone_page_state(zone, NR_BOUNCE)),
K(free_pcp),
K(this_cpu_read(zone->pageset->pcp.count)),
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 8d77ee426e22..663f49ed1fd6 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1162,7 +1162,6 @@ const char * const vmstat_text[] = {
"nr_zone_unevictable",
"nr_zone_write_pending",
"nr_mlock",
- "nr_page_table_pages",
"nr_bounce",
#if IS_ENABLED(CONFIG_ZSMALLOC)
"nr_zspages",
@@ -1220,6 +1219,7 @@ const char * const vmstat_text[] = {
#if IS_ENABLED(CONFIG_SHADOW_CALL_STACK)
"nr_shadow_call_stack",
#endif
+ "nr_page_table_pages",
/* enum writeback_stat_item counters */
"nr_dirty_threshold",
--
2.29.2.454.gaff20da3a2-goog
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