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mm/workingset: prepare the workingset detection infrastructure for anon LRU 

To prepare the workingset detection for anon LRU, this patch splits
workingset event counters for refault, activate and restore into anon and
file variants, as well as the refaults counter in struct lruvec.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Link: http://lkml.kernel.org/r/1595490560-15117-4-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joonsoo Kim 2020-08-11 18:30:43 -07:00 committed by Linus Torvalds
parent b518154e59
commit 170b04b7ae
5 changed files with 43 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
include/linux/mmzone.h
View File

@ -173,9 +173,15 @@ enum node_stat_item {
NR_ISOLATED_ANON, /* Temporary isolated pages from anon lru */
NR_ISOLATED_FILE, /* Temporary isolated pages from file lru */
WORKINGSET_NODES,
WORKINGSET_REFAULT,
WORKINGSET_ACTIVATE,
WORKINGSET_RESTORE,
WORKINGSET_REFAULT_BASE,
WORKINGSET_REFAULT_ANON = WORKINGSET_REFAULT_BASE,
WORKINGSET_REFAULT_FILE,
WORKINGSET_ACTIVATE_BASE,
WORKINGSET_ACTIVATE_ANON = WORKINGSET_ACTIVATE_BASE,
WORKINGSET_ACTIVATE_FILE,
WORKINGSET_RESTORE_BASE,
WORKINGSET_RESTORE_ANON = WORKINGSET_RESTORE_BASE,
WORKINGSET_RESTORE_FILE,
WORKINGSET_NODERECLAIM,
NR_ANON_MAPPED, /* Mapped anonymous pages */
NR_FILE_MAPPED, /* pagecache pages mapped into pagetables.
@ -277,8 +283,8 @@ struct lruvec {
unsigned long file_cost;
/* Non-resident age, driven by LRU movement */
atomic_long_t nonresident_age;
/* Refaults at the time of last reclaim cycle */
unsigned long refaults;
/* Refaults at the time of last reclaim cycle, anon=0, file=1 */
unsigned long refaults[2];
/* Various lruvec state flags (enum lruvec_flags) */
unsigned long flags;
#ifdef CONFIG_MEMCG

16
mm/memcontrol.c
View File

@ -1530,12 +1530,18 @@ static char *memory_stat_format(struct mem_cgroup *memcg)
seq_buf_printf(&s, "%s %lu\n", vm_event_name(PGMAJFAULT),
memcg_events(memcg, PGMAJFAULT));
seq_buf_printf(&s, "workingset_refault %lu\n",
memcg_page_state(memcg, WORKINGSET_REFAULT));
seq_buf_printf(&s, "workingset_activate %lu\n",
memcg_page_state(memcg, WORKINGSET_ACTIVATE));
seq_buf_printf(&s, "workingset_refault_anon %lu\n",
memcg_page_state(memcg, WORKINGSET_REFAULT_ANON));
seq_buf_printf(&s, "workingset_refault_file %lu\n",
memcg_page_state(memcg, WORKINGSET_REFAULT_FILE));
seq_buf_printf(&s, "workingset_activate_anon %lu\n",
memcg_page_state(memcg, WORKINGSET_ACTIVATE_ANON));
seq_buf_printf(&s, "workingset_activate_file %lu\n",
memcg_page_state(memcg, WORKINGSET_ACTIVATE_FILE));
seq_buf_printf(&s, "workingset_restore %lu\n",
memcg_page_state(memcg, WORKINGSET_RESTORE));
memcg_page_state(memcg, WORKINGSET_RESTORE_ANON));
seq_buf_printf(&s, "workingset_restore %lu\n",
memcg_page_state(memcg, WORKINGSET_RESTORE_FILE));
seq_buf_printf(&s, "workingset_nodereclaim %lu\n",
memcg_page_state(memcg, WORKINGSET_NODERECLAIM));

15
mm/vmscan.c
View File

@ -2683,7 +2683,10 @@ again:
if (!sc->force_deactivate) {
unsigned long refaults;
if (inactive_is_low(target_lruvec, LRU_INACTIVE_ANON))
refaults = lruvec_page_state(target_lruvec,
WORKINGSET_ACTIVATE_ANON);
if (refaults != target_lruvec->refaults[0] ||
inactive_is_low(target_lruvec, LRU_INACTIVE_ANON))
sc->may_deactivate |= DEACTIVATE_ANON;
else
sc->may_deactivate &= ~DEACTIVATE_ANON;
@ -2694,8 +2697,8 @@ again:
* rid of any stale active pages quickly.
*/
refaults = lruvec_page_state(target_lruvec,
WORKINGSET_ACTIVATE);
if (refaults != target_lruvec->refaults ||
WORKINGSET_ACTIVATE_FILE);
if (refaults != target_lruvec->refaults[1] ||
inactive_is_low(target_lruvec, LRU_INACTIVE_FILE))
sc->may_deactivate |= DEACTIVATE_FILE;
else
@ -2972,8 +2975,10 @@ static void snapshot_refaults(struct mem_cgroup *target_memcg, pg_data_t *pgdat)
unsigned long refaults;
target_lruvec = mem_cgroup_lruvec(target_memcg, pgdat);
refaults = lruvec_page_state(target_lruvec, WORKINGSET_ACTIVATE);
target_lruvec->refaults = refaults;
refaults = lruvec_page_state(target_lruvec, WORKINGSET_ACTIVATE_ANON);
target_lruvec->refaults[0] = refaults;
refaults = lruvec_page_state(target_lruvec, WORKINGSET_ACTIVATE_FILE);
target_lruvec->refaults[1] = refaults;
}
/*

9
mm/vmstat.c
View File

@ -1167,9 +1167,12 @@ const char * const vmstat_text[] = {
"nr_isolated_anon",
"nr_isolated_file",
"workingset_nodes",
"workingset_refault",
"workingset_activate",
"workingset_restore",
"workingset_refault_anon",
"workingset_refault_file",
"workingset_activate_anon",
"workingset_activate_file",
"workingset_restore_anon",
"workingset_restore_file",
"workingset_nodereclaim",
"nr_anon_pages",
"nr_mapped",

8
mm/workingset.c
View File

@ -6,6 +6,7 @@
*/
#include <linux/memcontrol.h>
#include <linux/mm_inline.h>
#include <linux/writeback.h>
#include <linux/shmem_fs.h>
#include <linux/pagemap.h>
@ -280,6 +281,7 @@ void *workingset_eviction(struct page *page, struct mem_cgroup *target_memcg)
*/
void workingset_refault(struct page *page, void *shadow)
{
bool file = page_is_file_lru(page);
struct mem_cgroup *eviction_memcg;
struct lruvec *eviction_lruvec;
unsigned long refault_distance;
@ -346,7 +348,7 @@ void workingset_refault(struct page *page, void *shadow)
memcg = page_memcg(page);
lruvec = mem_cgroup_lruvec(memcg, pgdat);
inc_lruvec_state(lruvec, WORKINGSET_REFAULT);
inc_lruvec_state(lruvec, WORKINGSET_REFAULT_BASE + file);
/*
* Compare the distance to the existing workingset size. We
@ -366,7 +368,7 @@ void workingset_refault(struct page *page, void *shadow)
SetPageActive(page);
workingset_age_nonresident(lruvec, hpage_nr_pages(page));
inc_lruvec_state(lruvec, WORKINGSET_ACTIVATE);
inc_lruvec_state(lruvec, WORKINGSET_ACTIVATE_BASE + file);
/* Page was active prior to eviction */
if (workingset) {
@ -375,7 +377,7 @@ void workingset_refault(struct page *page, void *shadow)
spin_lock_irq(&page_pgdat(page)->lru_lock);
lru_note_cost_page(page);
spin_unlock_irq(&page_pgdat(page)->lru_lock);
inc_lruvec_state(lruvec, WORKINGSET_RESTORE);
inc_lruvec_state(lruvec, WORKINGSET_RESTORE_BASE + file);
}
out:
rcu_read_unlock();