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mm: add system wide stats items category

Browse Source 
/proc/vmstat contains events and stats, events can only grow, but stats
can grow and shrink.

vmstat has the following:
-------------------------
NR_VM_ZONE_STAT_ITEMS:	per-zone stats
NR_VM_NUMA_EVENT_ITEMS:	per-numa events
NR_VM_NODE_STAT_ITEMS:	per-numa stats
NR_VM_WRITEBACK_STAT_ITEMS:	system-wide background-writeback and
				dirty-throttling tresholds.
NR_VM_EVENT_ITEMS:	system-wide events
-------------------------

Rename NR_VM_WRITEBACK_STAT_ITEMS to NR_VM_STAT_ITEMS, to track the
system-wide stats, we are going to add per-page metadata stats to this
category in the next patch.

Also delete unused writeback_stat_name().

Link: https://lkml.kernel.org/r/20240809191020.1142142-2-pasha.tatashin@soleen.com
Link: https://lkml.kernel.org/r/20240808213437.682006-3-pasha.tatashin@soleen.com
Fixes: 15995a3524 ("mm: report per-page metadata information")
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Suggested-by: Yosry Ahmed <yosryahmed@google.com>
Tested-by: Alison Schofield <alison.schofield@intel.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com>
Cc: Joel Granados <j.granados@samsung.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Li Zhijian <lizhijian@fujitsu.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Sourav Panda <souravpanda@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Yi Zhang <yi.zhang@redhat.com>
Cc: Fan Ni <fan.ni@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Pasha Tatashin 2024-08-08 21:34:35 +00:00 committed by Andrew Morton
parent ace0741a55
commit f4cb78af91
2 changed files with 7 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
include/linux/vmstat.h
View File

@ -34,10 +34,11 @@ struct reclaim_stat {
unsigned nr_lazyfree_fail;
};
enum writeback_stat_item {
/* Stat data for system wide items */
enum vm_stat_item {
NR_DIRTY_THRESHOLD,
NR_DIRTY_BG_THRESHOLD,
NR_VM_WRITEBACK_STAT_ITEMS,
NR_VM_STAT_ITEMS,
};
#ifdef CONFIG_VM_EVENT_COUNTERS
@ -514,21 +515,13 @@ static inline const char *lru_list_name(enum lru_list lru)
return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
}
static inline const char *writeback_stat_name(enum writeback_stat_item item)
{
return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
NR_VM_NUMA_EVENT_ITEMS +
NR_VM_NODE_STAT_ITEMS +
item];
}
#if defined(CONFIG_VM_EVENT_COUNTERS) || defined(CONFIG_MEMCG)
static inline const char *vm_event_name(enum vm_event_item item)
{
return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
NR_VM_NUMA_EVENT_ITEMS +
NR_VM_NODE_STAT_ITEMS +
NR_VM_WRITEBACK_STAT_ITEMS +
NR_VM_STAT_ITEMS +
item];
}
#endif /* CONFIG_VM_EVENT_COUNTERS || CONFIG_MEMCG */

6
mm/vmstat.c
View File

@ -1257,7 +1257,7 @@ const char * const vmstat_text[] = {
"pgdemote_khugepaged",
"nr_memmap",
"nr_memmap_boot",
/* enum writeback_stat_item counters */
/* system-wide enum vm_stat_item counters */
"nr_dirty_threshold",
"nr_dirty_background_threshold",
@ -1790,7 +1790,7 @@ static const struct seq_operations zoneinfo_op = {
#define NR_VMSTAT_ITEMS (NR_VM_ZONE_STAT_ITEMS + \
NR_VM_NUMA_EVENT_ITEMS + \
NR_VM_NODE_STAT_ITEMS + \
NR_VM_WRITEBACK_STAT_ITEMS + \
NR_VM_STAT_ITEMS + \
(IS_ENABLED(CONFIG_VM_EVENT_COUNTERS) ? \
NR_VM_EVENT_ITEMS : 0))
@ -1827,7 +1827,7 @@ static void *vmstat_start(struct seq_file *m, loff_t *pos)
global_dirty_limits(v + NR_DIRTY_BG_THRESHOLD,
v + NR_DIRTY_THRESHOLD);
v += NR_VM_WRITEBACK_STAT_ITEMS;
v += NR_VM_STAT_ITEMS;
#ifdef CONFIG_VM_EVENT_COUNTERS
all_vm_events(v);