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generic: 6.1: manually refresh mglru patch with new kernel version

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Refresh mglru patch for new kernel version due to very fun backport
changing name from folio to pages.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
This commit is contained in:
Christian Marangi
2023-05-22 02:36:35 +02:00
parent 19a246bb65
commit e41466edab
9 changed files with 162 additions and 171 deletions
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30
target/linux/generic/backport-6.1/020-v6.3-19-mm-add-vma_has_recency.patch
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@@ -58,9 +58,9 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
--- a/include/linux/mm_inline.h --- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h +++ b/include/linux/mm_inline.h
@@ -333,4 +333,13 @@ static __always_inline void del_page_fro @@ -606,5 +606,13 @@ static __always_inline void del_page_fro
update_lru_size(lruvec, page_lru(page), page_zonenum(page), make_pte_marker(PTE_MARKER_UFFD_WP));
-thp_nr_pages(page)); #endif
} }
+ +
+static inline bool vma_has_recency(struct vm_area_struct *vma) +static inline bool vma_has_recency(struct vm_area_struct *vma)
@@ -70,18 +70,10 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+ +
+ return true; + return true;
+} +}
+
#endif #endif
--- a/mm/memory.c --- a/mm/memory.c
+++ b/mm/memory.c +++ b/mm/memory.c
@@ -41,6 +41,7 @@
#include <linux/kernel_stat.h>
#include <linux/mm.h>
+#include <linux/mm_inline.h>
#include <linux/sched/mm.h>
#include <linux/sched/coredump.h>
#include <linux/sched/numa_balancing.h>
@@ -1353,8 +1354,7 @@ again: @@ -1353,8 +1354,7 @@ again:
force_flush = 1; force_flush = 1;
set_page_dirty(page); set_page_dirty(page);
@@ -121,10 +113,10 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- /* - /*
- * Don't treat a reference through - * Don't treat a reference through
- * a sequentially read mapping as such. - * a sequentially read mapping as such.
- * If the page has been used in another mapping, - * If the folio has been used in another mapping,
- * we will catch it; if this other mapping is - * we will catch it; if this other mapping is
- * already gone, the unmap path will have set - * already gone, the unmap path will have set
- * PG_referenced or activated the page. - * the referenced flag or activated the folio.
- */ - */
- if (likely(!(vma->vm_flags & VM_SEQ_READ))) - if (likely(!(vma->vm_flags & VM_SEQ_READ)))
- referenced++; - referenced++;
@@ -157,10 +149,10 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
return false; return false;
@@ -876,6 +878,7 @@ int page_referenced(struct page *page, @@ -876,6 +878,7 @@ int page_referenced(struct page *page,
.rmap_one = page_referenced_one,
.arg = (void *)&pra, .arg = (void *)&pra,
.anon_lock = page_lock_anon_vma_read, .anon_lock = folio_lock_anon_vma_read,
+ .invalid_vma = invalid_page_referenced_vma, .try_lock = true,
+ .invalid_vma = invalid_folio_referenced_vma,
}; };
*vm_flags = 0; *vm_flags = 0;
@@ -174,10 +166,10 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- * cgroups - * cgroups
- */ - */
- if (memcg) { - if (memcg) {
- rwc.invalid_vma = invalid_page_referenced_vma; - rwc.invalid_vma = invalid_folio_referenced_vma;
- } - }
- -
rmap_walk(page, &rwc); rmap_walk(folio, &rwc);
*vm_flags = pra.vm_flags; *vm_flags = pra.vm_flags;
--- a/mm/vmscan.c --- a/mm/vmscan.c

100
target/linux/generic/backport-6.1/020-v6.3-21-mm-multi-gen-LRU-rename-lru_gen_struct-to-lru_gen_pa.patch
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@@ -2,7 +2,7 @@ From 348fdbada9fb3f0bf1a53651be46319105af187f Mon Sep 17 00:00:00 2001
From: Yu Zhao <yuzhao@google.com> From: Yu Zhao <yuzhao@google.com>
Date: Wed, 21 Dec 2022 21:18:59 -0700 Date: Wed, 21 Dec 2022 21:18:59 -0700
Subject: [PATCH 21/29] mm: multi-gen LRU: rename lru_gen_struct to Subject: [PATCH 21/29] mm: multi-gen LRU: rename lru_gen_struct to
lru_gen_page lru_gen_folio
Patch series "mm: multi-gen LRU: memcg LRU", v3. Patch series "mm: multi-gen LRU: memcg LRU", v3.
@@ -10,7 +10,7 @@ Overview
======== ========
An memcg LRU is a per-node LRU of memcgs. It is also an LRU of LRUs, An memcg LRU is a per-node LRU of memcgs. It is also an LRU of LRUs,
since each node and memcg combination has an LRU of pages (see since each node and memcg combination has an LRU of folios (see
mem_cgroup_lruvec()). mem_cgroup_lruvec()).
Its goal is to improve the scalability of global reclaim, which is Its goal is to improve the scalability of global reclaim, which is
@@ -24,7 +24,7 @@ the worst-case complexity O(n). Therefore, on average, it has a sublinear
complexity in contrast to the current linear complexity. complexity in contrast to the current linear complexity.
The basic structure of an memcg LRU can be understood by an analogy to The basic structure of an memcg LRU can be understood by an analogy to
the active/inactive LRU (of pages): the active/inactive LRU (of folios):
1. It has the young and the old (generations), i.e., the counterparts 1. It has the young and the old (generations), i.e., the counterparts
to the active and the inactive; to the active and the inactive;
2. The increment of max_seq triggers promotion, i.e., the counterpart 2. The increment of max_seq triggers promotion, i.e., the counterpart
@@ -101,7 +101,7 @@ The following is a simple test to quickly verify its effectiveness.
This patch (of 8): This patch (of 8):
The new name lru_gen_page will be more distinct from the coming The new name lru_gen_folio will be more distinct from the coming
lru_gen_memcg. lru_gen_memcg.
Link: https://lkml.kernel.org/r/20221222041905.2431096-1-yuzhao@google.com Link: https://lkml.kernel.org/r/20221222041905.2431096-1-yuzhao@google.com
@@ -125,31 +125,31 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
--- a/include/linux/mm_inline.h --- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h +++ b/include/linux/mm_inline.h
@@ -168,7 +168,7 @@ static inline void lru_gen_update_size(s @@ -168,7 +168,7 @@ static inline void lru_gen_update_size(s
int zone = page_zonenum(page); int zone = folio_zonenum(folio);
int delta = thp_nr_pages(page); int delta = thp_nr_folios(folio);
enum lru_list lru = type * LRU_INACTIVE_FILE; enum lru_list lru = type * LRU_INACTIVE_FILE;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
VM_WARN_ON_ONCE(old_gen != -1 && old_gen >= MAX_NR_GENS); VM_WARN_ON_ONCE(old_gen != -1 && old_gen >= MAX_NR_GENS);
VM_WARN_ON_ONCE(new_gen != -1 && new_gen >= MAX_NR_GENS); VM_WARN_ON_ONCE(new_gen != -1 && new_gen >= MAX_NR_GENS);
@@ -214,7 +214,7 @@ static inline bool lru_gen_add_page(stru @@ -214,7 +214,7 @@ static inline bool lru_gen_add_folio(stru
int gen = page_lru_gen(page); int gen = folio_lru_gen(folio);
int type = page_is_file_lru(page); int type = folio_is_file_lru(folio);
int zone = page_zonenum(page); int zone = folio_zonenum(folio);
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
VM_WARN_ON_ONCE_PAGE(gen != -1, page); VM_WARN_ON_ONCE_FOLIO(gen != -1, folio);
--- a/include/linux/mmzone.h --- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h +++ b/include/linux/mmzone.h
@@ -394,7 +394,7 @@ enum { @@ -394,7 +394,7 @@ enum {
* The number of pages in each generation is eventually consistent and therefore * The number of folios in each generation is eventually consistent and therefore
* can be transiently negative when reset_batch_size() is pending. * can be transiently negative when reset_batch_size() is pending.
*/ */
-struct lru_gen_struct { -struct lru_gen_struct {
+struct lru_gen_page { +struct lru_gen_folio {
/* the aging increments the youngest generation number */ /* the aging increments the youngest generation number */
unsigned long max_seq; unsigned long max_seq;
/* the eviction increments the oldest generation numbers */ /* the eviction increments the oldest generation numbers */
@@ -158,7 +158,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
/* the lruvec under reclaim */ /* the lruvec under reclaim */
struct lruvec *lruvec; struct lruvec *lruvec;
- /* unstable max_seq from lru_gen_struct */ - /* unstable max_seq from lru_gen_struct */
+ /* unstable max_seq from lru_gen_page */ + /* unstable max_seq from lru_gen_folio */
unsigned long max_seq; unsigned long max_seq;
/* the next address within an mm to scan */ /* the next address within an mm to scan */
unsigned long next_addr; unsigned long next_addr;
@@ -167,7 +167,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
#ifdef CONFIG_LRU_GEN #ifdef CONFIG_LRU_GEN
/* evictable pages divided into generations */ /* evictable pages divided into generations */
- struct lru_gen_struct lrugen; - struct lru_gen_struct lrugen;
+ struct lru_gen_page lrugen; + struct lru_gen_folio lrugen;
/* to concurrently iterate lru_gen_mm_list */ /* to concurrently iterate lru_gen_mm_list */
struct lru_gen_mm_state mm_state; struct lru_gen_mm_state mm_state;
#endif #endif
@@ -178,7 +178,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
static bool __maybe_unused seq_is_valid(struct lruvec *lruvec) static bool __maybe_unused seq_is_valid(struct lruvec *lruvec)
{ {
- /* see the comment on lru_gen_struct */ - /* see the comment on lru_gen_struct */
+ /* see the comment on lru_gen_page */ + /* see the comment on lru_gen_folio */
return get_nr_gens(lruvec, LRU_GEN_FILE) >= MIN_NR_GENS && return get_nr_gens(lruvec, LRU_GEN_FILE) >= MIN_NR_GENS &&
get_nr_gens(lruvec, LRU_GEN_FILE) <= get_nr_gens(lruvec, LRU_GEN_ANON) && get_nr_gens(lruvec, LRU_GEN_FILE) <= get_nr_gens(lruvec, LRU_GEN_ANON) &&
get_nr_gens(lruvec, LRU_GEN_ANON) <= MAX_NR_GENS; get_nr_gens(lruvec, LRU_GEN_ANON) <= MAX_NR_GENS;
@@ -187,7 +187,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
struct ctrl_pos *pos) struct ctrl_pos *pos)
{ {
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
int hist = lru_hist_from_seq(lrugen->min_seq[type]); int hist = lru_hist_from_seq(lrugen->min_seq[type]);
pos->refaulted = lrugen->avg_refaulted[type][tier] + pos->refaulted = lrugen->avg_refaulted[type][tier] +
@@ -196,25 +196,25 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
{ {
int hist, tier; int hist, tier;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
bool clear = carryover ? NR_HIST_GENS == 1 : NR_HIST_GENS > 1; bool clear = carryover ? NR_HIST_GENS == 1 : NR_HIST_GENS > 1;
unsigned long seq = carryover ? lrugen->min_seq[type] : lrugen->max_seq + 1; unsigned long seq = carryover ? lrugen->min_seq[type] : lrugen->max_seq + 1;
@@ -3408,7 +3408,7 @@ static int page_update_gen(struct page * @@ -3408,7 +3408,7 @@ static int folio_update_gen(struct folio *
static int page_inc_gen(struct lruvec *lruvec, struct page *page, bool reclaiming) static int folio_inc_gen(struct lruvec *lruvec, struct folio *folio, bool reclaiming)
{ {
int type = page_is_file_lru(page); int type = folio_is_file_lru(folio);
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
int new_gen, old_gen = lru_gen_from_seq(lrugen->min_seq[type]); int new_gen, old_gen = lru_gen_from_seq(lrugen->min_seq[type]);
unsigned long new_flags, old_flags = READ_ONCE(page->flags); unsigned long new_flags, old_flags = READ_ONCE(folio->flags);
@@ -3453,7 +3453,7 @@ static void update_batch_size(struct lru @@ -3453,7 +3453,7 @@ static void update_batch_size(struct lru
static void reset_batch_size(struct lruvec *lruvec, struct lru_gen_mm_walk *walk) static void reset_batch_size(struct lruvec *lruvec, struct lru_gen_mm_walk *walk)
{ {
int gen, type, zone; int gen, type, zone;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
walk->batched = 0; walk->batched = 0;
@@ -223,7 +223,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
int zone; int zone;
int remaining = MAX_LRU_BATCH; int remaining = MAX_LRU_BATCH;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
int new_gen, old_gen = lru_gen_from_seq(lrugen->min_seq[type]); int new_gen, old_gen = lru_gen_from_seq(lrugen->min_seq[type]);
if (type == LRU_GEN_ANON && !can_swap) if (type == LRU_GEN_ANON && !can_swap)
@@ -232,7 +232,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
int gen, type, zone; int gen, type, zone;
bool success = false; bool success = false;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
DEFINE_MIN_SEQ(lruvec); DEFINE_MIN_SEQ(lruvec);
VM_WARN_ON_ONCE(!seq_is_valid(lruvec)); VM_WARN_ON_ONCE(!seq_is_valid(lruvec));
@@ -241,7 +241,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
} }
- /* see the comment on lru_gen_struct */ - /* see the comment on lru_gen_struct */
+ /* see the comment on lru_gen_page */ + /* see the comment on lru_gen_folio */
if (can_swap) { if (can_swap) {
min_seq[LRU_GEN_ANON] = min(min_seq[LRU_GEN_ANON], min_seq[LRU_GEN_FILE]); min_seq[LRU_GEN_ANON] = min(min_seq[LRU_GEN_ANON], min_seq[LRU_GEN_FILE]);
min_seq[LRU_GEN_FILE] = max(min_seq[LRU_GEN_ANON], lrugen->min_seq[LRU_GEN_FILE]); min_seq[LRU_GEN_FILE] = max(min_seq[LRU_GEN_ANON], lrugen->min_seq[LRU_GEN_FILE]);
@@ -250,7 +250,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
int prev, next; int prev, next;
int type, zone; int type, zone;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
spin_lock_irq(&lruvec->lru_lock); spin_lock_irq(&lruvec->lru_lock);
@@ -259,7 +259,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
struct lru_gen_mm_walk *walk; struct lru_gen_mm_walk *walk;
struct mm_struct *mm = NULL; struct mm_struct *mm = NULL;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
VM_WARN_ON_ONCE(max_seq > READ_ONCE(lrugen->max_seq)); VM_WARN_ON_ONCE(max_seq > READ_ONCE(lrugen->max_seq));
@@ -268,25 +268,25 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
unsigned long young = 0; unsigned long young = 0;
unsigned long total = 0; unsigned long total = 0;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
struct mem_cgroup *memcg = lruvec_memcg(lruvec); struct mem_cgroup *memcg = lruvec_memcg(lruvec);
for (type = !can_swap; type < ANON_AND_FILE; type++) { for (type = !can_swap; type < ANON_AND_FILE; type++) {
@@ -4466,7 +4466,7 @@ static bool sort_page(struct lruvec *lru @@ -4466,7 +4466,7 @@ static bool sort_folio(struct lruvec *lru
int delta = thp_nr_pages(page); int delta = thp_nr_folios(folio);
int refs = page_lru_refs(page); int refs = folio_lru_refs(folio);
int tier = lru_tier_from_refs(refs); int tier = lru_tier_from_refs(refs);
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
VM_WARN_ON_ONCE_PAGE(gen >= MAX_NR_GENS, page); VM_WARN_ON_ONCE_folio(gen >= MAX_NR_GENS, folio);
@@ -4566,7 +4566,7 @@ static int scan_pages(struct lruvec *lru @@ -4566,7 +4566,7 @@ static int scan_folios(struct lruvec *lru
int scanned = 0; int scanned = 0;
int isolated = 0; int isolated = 0;
int remaining = MAX_LRU_BATCH; int remaining = MAX_LRU_BATCH;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
struct mem_cgroup *memcg = lruvec_memcg(lruvec); struct mem_cgroup *memcg = lruvec_memcg(lruvec);
VM_WARN_ON_ONCE(!list_empty(list)); VM_WARN_ON_ONCE(!list_empty(list));
@@ -295,7 +295,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
static bool __maybe_unused state_is_valid(struct lruvec *lruvec) static bool __maybe_unused state_is_valid(struct lruvec *lruvec)
{ {
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
if (lrugen->enabled) { if (lrugen->enabled) {
enum lru_list lru; enum lru_list lru;
@@ -304,7 +304,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
int type, tier; int type, tier;
int hist = lru_hist_from_seq(seq); int hist = lru_hist_from_seq(seq);
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
for (tier = 0; tier < MAX_NR_TIERS; tier++) { for (tier = 0; tier < MAX_NR_TIERS; tier++) {
seq_printf(m, " %10d", tier); seq_printf(m, " %10d", tier);
@@ -313,7 +313,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
bool full = !debugfs_real_fops(m->file)->write; bool full = !debugfs_real_fops(m->file)->write;
struct lruvec *lruvec = v; struct lruvec *lruvec = v;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
int nid = lruvec_pgdat(lruvec)->node_id; int nid = lruvec_pgdat(lruvec)->node_id;
struct mem_cgroup *memcg = lruvec_memcg(lruvec); struct mem_cgroup *memcg = lruvec_memcg(lruvec);
DEFINE_MAX_SEQ(lruvec); DEFINE_MAX_SEQ(lruvec);
@@ -322,7 +322,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
int i; int i;
int gen, type, zone; int gen, type, zone;
- struct lru_gen_struct *lrugen = &lruvec->lrugen; - struct lru_gen_struct *lrugen = &lruvec->lrugen;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
lrugen->max_seq = MIN_NR_GENS + 1; lrugen->max_seq = MIN_NR_GENS + 1;
lrugen->enabled = lru_gen_enabled(); lrugen->enabled = lru_gen_enabled();
@@ -333,16 +333,16 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
unsigned long min_seq; unsigned long min_seq;
struct lruvec *lruvec; struct lruvec *lruvec;
- struct lru_gen_struct *lrugen; - struct lru_gen_struct *lrugen;
+ struct lru_gen_page *lrugen; + struct lru_gen_folio *lrugen;
int type = page_is_file_lru(page); int type = folio_is_file_lru(folio);
int delta = thp_nr_pages(page); int delta = thp_nr_folios(folio);
int refs = page_lru_refs(page); int refs = folio_lru_refs(folio);
@@ -252,7 +252,7 @@ static void lru_gen_refault(struct page @@ -252,7 +252,7 @@ static void lru_gen_refault(struct folio
unsigned long token; unsigned long token;
unsigned long min_seq; unsigned long min_seq;
struct lruvec *lruvec; struct lruvec *lruvec;
- struct lru_gen_struct *lrugen; - struct lru_gen_struct *lrugen;
+ struct lru_gen_page *lrugen; + struct lru_gen_folio *lrugen;
struct mem_cgroup *memcg; struct mem_cgroup *memcg;
struct pglist_data *pgdat; struct pglist_data *pgdat;
int type = page_is_file_lru(page); int type = folio_is_file_lru(folio);

88
target/linux/generic/backport-6.1/020-v6.3-22-mm-multi-gen-LRU-rename-lrugen-lists-to-lrugen-pages.patch
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@@ -2,9 +2,9 @@ From afd37e73db04c7e6b47411120ac5f6a7eca51fec Mon Sep 17 00:00:00 2001
From: Yu Zhao <yuzhao@google.com> From: Yu Zhao <yuzhao@google.com>
Date: Wed, 21 Dec 2022 21:19:00 -0700 Date: Wed, 21 Dec 2022 21:19:00 -0700
Subject: [PATCH 22/29] mm: multi-gen LRU: rename lrugen->lists[] to Subject: [PATCH 22/29] mm: multi-gen LRU: rename lrugen->lists[] to
lrugen->pages[] lrugen->folios[]
lru_gen_page will be chained into per-node lists by the coming lru_gen_folio will be chained into per-node lists by the coming
lrugen->list. lrugen->list.
Link: https://lkml.kernel.org/r/20221222041905.2431096-3-yuzhao@google.com Link: https://lkml.kernel.org/r/20221222041905.2431096-3-yuzhao@google.com
@@ -25,15 +25,15 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
--- a/include/linux/mm_inline.h --- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h +++ b/include/linux/mm_inline.h
@@ -246,9 +246,9 @@ static inline bool lru_gen_add_page(stru @@ -246,9 +246,9 @@ static inline bool lru_gen_add_folio(stru
lru_gen_update_size(lruvec, page, -1, gen); lru_gen_update_size(lruvec, folio, -1, gen);
/* for rotate_reclaimable_page() */ /* for rotate_reclaimable_folio() */
if (reclaiming) if (reclaiming)
- list_add_tail(&page->lru, &lrugen->lists[gen][type][zone]); - list_add_tail(&folio->lru, &lrugen->lists[gen][type][zone]);
+ list_add_tail(&page->lru, &lrugen->pages[gen][type][zone]); + list_add_tail(&folio->lru, &lrugen->folios[gen][type][zone]);
else else
- list_add(&page->lru, &lrugen->lists[gen][type][zone]); - list_add(&folio->lru, &lrugen->lists[gen][type][zone]);
+ list_add(&page->lru, &lrugen->pages[gen][type][zone]); + list_add(&folio->lru, &lrugen->folios[gen][type][zone]);
return true; return true;
} }
@@ -42,31 +42,31 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
@@ -302,7 +302,7 @@ enum lruvec_flags { @@ -302,7 +302,7 @@ enum lruvec_flags {
* They form a sliding window of a variable size [MIN_NR_GENS, MAX_NR_GENS]. An * They form a sliding window of a variable size [MIN_NR_GENS, MAX_NR_GENS]. An
* offset within MAX_NR_GENS, i.e., gen, indexes the LRU list of the * offset within MAX_NR_GENS, i.e., gen, indexes the LRU list of the
* corresponding generation. The gen counter in page->flags stores gen+1 while * corresponding generation. The gen counter in folio->flags stores gen+1 while
- * a page is on one of lrugen->lists[]. Otherwise it stores 0. - * a page is on one of lrugen->lists[]. Otherwise it stores 0.
+ * a page is on one of lrugen->pages[]. Otherwise it stores 0. + * a page is on one of lrugen->folios[]. Otherwise it stores 0.
* *
* A page is added to the youngest generation on faulting. The aging needs to * A folio is added to the youngest generation on faulting. The aging needs to
* check the accessed bit at least twice before handing this page over to the * check the accessed bit at least twice before handing this folio over to the
@@ -314,8 +314,8 @@ enum lruvec_flags { @@ -314,8 +314,8 @@ enum lruvec_flags {
* rest of generations, if they exist, are considered inactive. See * rest of generations, if they exist, are considered inactive. See
* lru_gen_is_active(). * lru_gen_is_active().
* *
- * PG_active is always cleared while a page is on one of lrugen->lists[] so that - * PG_active is always cleared while a page is on one of lrugen->lists[] so that
- * the aging needs not to worry about it. And it's set again when a page - * the aging needs not to worry about it. And it's set again when a page
+ * PG_active is always cleared while a page is on one of lrugen->pages[] so + * PG_active is always cleared while a page is on one of lrugen->folios[] so
+ * that the aging needs not to worry about it. And it's set again when a page + * that the aging needs not to worry about it. And it's set again when a page
* considered active is isolated for non-reclaiming purposes, e.g., migration. * considered active is isolated for non-reclaiming purposes, e.g., migration.
* See lru_gen_add_page() and lru_gen_del_page(). * See lru_gen_add_folio() and lru_gen_del_folio().
* *
@@ -402,7 +402,7 @@ struct lru_gen_page { @@ -402,7 +402,7 @@ struct lru_gen_folio {
/* the birth time of each generation in jiffies */ /* the birth time of each generation in jiffies */
unsigned long timestamps[MAX_NR_GENS]; unsigned long timestamps[MAX_NR_GENS];
/* the multi-gen LRU lists, lazily sorted on eviction */ /* the multi-gen LRU lists, lazily sorted on eviction */
- struct list_head lists[MAX_NR_GENS][ANON_AND_FILE][MAX_NR_ZONES]; - struct list_head lists[MAX_NR_GENS][ANON_AND_FILE][MAX_NR_ZONES];
+ struct list_head pages[MAX_NR_GENS][ANON_AND_FILE][MAX_NR_ZONES]; + struct list_head folios[MAX_NR_GENS][ANON_AND_FILE][MAX_NR_ZONES];
/* the multi-gen LRU sizes, eventually consistent */ /* the multi-gen LRU sizes, eventually consistent */
long nr_pages[MAX_NR_GENS][ANON_AND_FILE][MAX_NR_ZONES]; long nr_folios[MAX_NR_GENS][ANON_AND_FILE][MAX_NR_ZONES];
/* the exponential moving average of refaulted */ /* the exponential moving average of refaulted */
--- a/mm/vmscan.c --- a/mm/vmscan.c
+++ b/mm/vmscan.c +++ b/mm/vmscan.c
@@ -75,16 +75,16 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
/* prevent cold/hot inversion if force_scan is true */ /* prevent cold/hot inversion if force_scan is true */
for (zone = 0; zone < MAX_NR_ZONES; zone++) { for (zone = 0; zone < MAX_NR_ZONES; zone++) {
- struct list_head *head = &lrugen->lists[old_gen][type][zone]; - struct list_head *head = &lrugen->lists[old_gen][type][zone];
+ struct list_head *head = &lrugen->pages[old_gen][type][zone]; + struct list_head *head = &lrugen->folios[old_gen][type][zone];
while (!list_empty(head)) { while (!list_empty(head)) {
struct page *page = lru_to_page(head); struct folio *folio = lru_to_folio(head);
@@ -3998,7 +3998,7 @@ static bool inc_min_seq(struct lruvec *l @@ -3998,7 +3998,7 @@ static bool inc_min_seq(struct lruvec *l
VM_WARN_ON_ONCE_PAGE(page_zonenum(page) != zone, page); VM_WARN_ON_ONCE_folio(folio_zonenum(folio) != zone, folio);
new_gen = page_inc_gen(lruvec, page, false); new_gen = folio_inc_gen(lruvec, folio, false);
- list_move_tail(&page->lru, &lrugen->lists[new_gen][type][zone]); - list_move_tail(&folio->lru, &lrugen->lists[new_gen][type][zone]);
+ list_move_tail(&page->lru, &lrugen->pages[new_gen][type][zone]); + list_move_tail(&folio->lru, &lrugen->folios[new_gen][type][zone]);
if (!--remaining) if (!--remaining)
return false; return false;
@@ -93,52 +93,52 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
for (zone = 0; zone < MAX_NR_ZONES; zone++) { for (zone = 0; zone < MAX_NR_ZONES; zone++) {
- if (!list_empty(&lrugen->lists[gen][type][zone])) - if (!list_empty(&lrugen->lists[gen][type][zone]))
+ if (!list_empty(&lrugen->pages[gen][type][zone])) + if (!list_empty(&lrugen->folios[gen][type][zone]))
goto next; goto next;
} }
@@ -4491,7 +4491,7 @@ static bool sort_page(struct lruvec *lru @@ -4491,7 +4491,7 @@ static bool sort_folio(struct lruvec *lru
/* promoted */ /* promoted */
if (gen != lru_gen_from_seq(lrugen->min_seq[type])) { if (gen != lru_gen_from_seq(lrugen->min_seq[type])) {
- list_move(&page->lru, &lrugen->lists[gen][type][zone]); - list_move(&folio->lru, &lrugen->lists[gen][type][zone]);
+ list_move(&page->lru, &lrugen->pages[gen][type][zone]); + list_move(&folio->lru, &lrugen->folios[gen][type][zone]);
return true; return true;
} }
@@ -4500,7 +4500,7 @@ static bool sort_page(struct lruvec *lru @@ -4500,7 +4500,7 @@ static bool sort_folio(struct lruvec *lru
int hist = lru_hist_from_seq(lrugen->min_seq[type]); int hist = lru_hist_from_seq(lrugen->min_seq[type]);
gen = page_inc_gen(lruvec, page, false); gen = folio_inc_gen(lruvec, folio, false);
- list_move_tail(&page->lru, &lrugen->lists[gen][type][zone]); - list_move_tail(&folio->lru, &lrugen->lists[gen][type][zone]);
+ list_move_tail(&page->lru, &lrugen->pages[gen][type][zone]); + list_move_tail(&folio->lru, &lrugen->folios[gen][type][zone]);
WRITE_ONCE(lrugen->protected[hist][type][tier - 1], WRITE_ONCE(lrugen->protected[hist][type][tier - 1],
lrugen->protected[hist][type][tier - 1] + delta); lrugen->protected[hist][type][tier - 1] + delta);
@@ -4512,7 +4512,7 @@ static bool sort_page(struct lruvec *lru @@ -4512,7 +4512,7 @@ static bool sort_folio(struct lruvec *lru
if (PageLocked(page) || PageWriteback(page) || if (folioLocked(folio) || folioWriteback(folio) ||
(type == LRU_GEN_FILE && PageDirty(page))) { (type == LRU_GEN_FILE && folioDirty(folio))) {
gen = page_inc_gen(lruvec, page, true); gen = folio_inc_gen(lruvec, folio, true);
- list_move(&page->lru, &lrugen->lists[gen][type][zone]); - list_move(&folio->lru, &lrugen->lists[gen][type][zone]);
+ list_move(&page->lru, &lrugen->pages[gen][type][zone]); + list_move(&folio->lru, &lrugen->folios[gen][type][zone]);
return true; return true;
} }
@@ -4579,7 +4579,7 @@ static int scan_pages(struct lruvec *lru @@ -4579,7 +4579,7 @@ static int scan_folios(struct lruvec *lru
for (zone = sc->reclaim_idx; zone >= 0; zone--) { for (zone = sc->reclaim_idx; zone >= 0; zone--) {
LIST_HEAD(moved); LIST_HEAD(moved);
int skipped = 0; int skipped = 0;
- struct list_head *head = &lrugen->lists[gen][type][zone]; - struct list_head *head = &lrugen->lists[gen][type][zone];
+ struct list_head *head = &lrugen->pages[gen][type][zone]; + struct list_head *head = &lrugen->folios[gen][type][zone];
while (!list_empty(head)) { while (!list_empty(head)) {
struct page *page = lru_to_page(head); struct folio *folio = lru_to_folio(head);
@@ -4980,7 +4980,7 @@ static bool __maybe_unused state_is_vali @@ -4980,7 +4980,7 @@ static bool __maybe_unused state_is_vali
int gen, type, zone; int gen, type, zone;
for_each_gen_type_zone(gen, type, zone) { for_each_gen_type_zone(gen, type, zone) {
- if (!list_empty(&lrugen->lists[gen][type][zone])) - if (!list_empty(&lrugen->lists[gen][type][zone]))
+ if (!list_empty(&lrugen->pages[gen][type][zone])) + if (!list_empty(&lrugen->folios[gen][type][zone]))
return false; return false;
} }
} }
@@ -147,7 +147,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
for_each_gen_type_zone(gen, type, zone) { for_each_gen_type_zone(gen, type, zone) {
- struct list_head *head = &lruvec->lrugen.lists[gen][type][zone]; - struct list_head *head = &lruvec->lrugen.lists[gen][type][zone];
+ struct list_head *head = &lruvec->lrugen.pages[gen][type][zone]; + struct list_head *head = &lruvec->lrugen.folios[gen][type][zone];
while (!list_empty(head)) { while (!list_empty(head)) {
bool success; bool success;
@@ -156,7 +156,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
for_each_gen_type_zone(gen, type, zone) for_each_gen_type_zone(gen, type, zone)
- INIT_LIST_HEAD(&lrugen->lists[gen][type][zone]); - INIT_LIST_HEAD(&lrugen->lists[gen][type][zone]);
+ INIT_LIST_HEAD(&lrugen->pages[gen][type][zone]); + INIT_LIST_HEAD(&lrugen->folios[gen][type][zone]);
lruvec->mm_state.seq = MIN_NR_GENS; lruvec->mm_state.seq = MIN_NR_GENS;
init_waitqueue_head(&lruvec->mm_state.wait); init_waitqueue_head(&lruvec->mm_state.wait);

27
target/linux/generic/backport-6.1/020-v6.3-23-mm-multi-gen-LRU-remove-eviction-fairness-safeguard.patch
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@@ -4,7 +4,7 @@ Date: Wed, 21 Dec 2022 21:19:01 -0700
Subject: [PATCH 23/29] mm: multi-gen LRU: remove eviction fairness safeguard Subject: [PATCH 23/29] mm: multi-gen LRU: remove eviction fairness safeguard
Recall that the eviction consumes the oldest generation: first it Recall that the eviction consumes the oldest generation: first it
bucket-sorts pages whose gen counters were updated by the aging and bucket-sorts folios whose gen counters were updated by the aging and
reclaims the rest; then it increments lrugen->min_seq. reclaims the rest; then it increments lrugen->min_seq.
The current eviction fairness safeguard for global reclaim has a The current eviction fairness safeguard for global reclaim has a
@@ -61,13 +61,13 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
static bool writeback_throttling_sane(struct scan_control *sc) static bool writeback_throttling_sane(struct scan_control *sc)
{ {
return true; return true;
@@ -4722,8 +4732,7 @@ static int isolate_pages(struct lruvec * @@ -4722,8 +4732,7 @@ static int isolate_folios(struct lruvec *
return scanned; return scanned;
} }
-static int evict_pages(struct lruvec *lruvec, struct scan_control *sc, int swappiness, -static int evict_folios(struct lruvec *lruvec, struct scan_control *sc, int swappiness,
- bool *need_swapping) - bool *need_swapping)
+static int evict_pages(struct lruvec *lruvec, struct scan_control *sc, int swappiness) +static int evict_folios(struct lruvec *lruvec, struct scan_control *sc, int swappiness)
{ {
int type; int type;
int scanned; int scanned;
@@ -81,7 +81,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
return scanned; return scanned;
} }
@@ -4853,68 +4859,26 @@ done: @@ -4853,67 +4859,26 @@ done:
return min_seq[!can_swap] + MIN_NR_GENS <= max_seq ? nr_to_scan : 0; return min_seq[!can_swap] + MIN_NR_GENS <= max_seq ? nr_to_scan : 0;
} }
@@ -93,7 +93,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- DEFINE_MAX_SEQ(lruvec); - DEFINE_MAX_SEQ(lruvec);
- -
- if (!current_is_kswapd()) { - if (!current_is_kswapd()) {
- /* age each memcg once to ensure fairness */ - /* age each memcg at most once to ensure fairness */
- if (max_seq - seq > 1) - if (max_seq - seq > 1)
- return true; - return true;
- -
@@ -118,10 +118,9 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- -
- /* - /*
- * A minimum amount of work was done under global memory pressure. For - * A minimum amount of work was done under global memory pressure. For
- * kswapd, it may be overshooting. For direct reclaim, the target isn't - * kswapd, it may be overshooting. For direct reclaim, the allocation
- * met, and yet the allocation may still succeed, since kswapd may have - * may succeed if all suitable zones are somewhat safe. In either case,
- * caught up. In either case, it's better to stop now, and restart if - * it's better to stop now, and restart later if necessary.
- * necessary.
- */ - */
- for (i = 0; i <= sc->reclaim_idx; i++) { - for (i = 0; i <= sc->reclaim_idx; i++) {
- unsigned long wmark; - unsigned long wmark;
@@ -163,8 +162,8 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
if (!nr_to_scan) if (!nr_to_scan)
goto done; goto done;
- delta = evict_pages(lruvec, sc, swappiness, &need_swapping); - delta = evict_folios(lruvec, sc, swappiness, &need_swapping);
+ delta = evict_pages(lruvec, sc, swappiness); + delta = evict_folios(lruvec, sc, swappiness);
if (!delta) if (!delta)
goto done; goto done;
@@ -181,8 +180,8 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
if (sc->nr_reclaimed >= nr_to_reclaim) if (sc->nr_reclaimed >= nr_to_reclaim)
return 0; return 0;
- if (!evict_pages(lruvec, sc, swappiness, NULL)) - if (!evict_folios(lruvec, sc, swappiness, NULL))
+ if (!evict_pages(lruvec, sc, swappiness)) + if (!evict_folios(lruvec, sc, swappiness))
return 0; return 0;
cond_resched(); cond_resched();

16
target/linux/generic/backport-6.1/020-v6.3-24-mm-multi-gen-LRU-remove-aging-fairness-safeguard.patch
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@@ -4,13 +4,13 @@ Date: Wed, 21 Dec 2022 21:19:02 -0700
Subject: [PATCH 24/29] mm: multi-gen LRU: remove aging fairness safeguard Subject: [PATCH 24/29] mm: multi-gen LRU: remove aging fairness safeguard
Recall that the aging produces the youngest generation: first it scans Recall that the aging produces the youngest generation: first it scans
for accessed pages and updates their gen counters; then it increments for accessed folios and updates their gen counters; then it increments
lrugen->max_seq. lrugen->max_seq.
The current aging fairness safeguard for kswapd uses two passes to The current aging fairness safeguard for kswapd uses two passes to
ensure the fairness to multiple eligible memcgs. On the first pass, ensure the fairness to multiple eligible memcgs. On the first pass,
which is shared with the eviction, it checks whether all eligible which is shared with the eviction, it checks whether all eligible
memcgs are low on cold pages. If so, it requires a second pass, on memcgs are low on cold folios. If so, it requires a second pass, on
which it ages all those memcgs at the same time. which it ages all those memcgs at the same time.
With memcg LRU, the aging, while ensuring eventual fairness, will run With memcg LRU, the aging, while ensuring eventual fairness, will run
@@ -56,11 +56,11 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
int gen, type, zone; int gen, type, zone;
@@ -4193,6 +4192,13 @@ static bool should_run_aging(struct lruv @@ -4193,6 +4192,13 @@ static bool should_run_aging(struct lruv
unsigned long total = 0; unsigned long total = 0;
struct lru_gen_page *lrugen = &lruvec->lrugen; struct lru_gen_folio *lrugen = &lruvec->lrugen;
struct mem_cgroup *memcg = lruvec_memcg(lruvec); struct mem_cgroup *memcg = lruvec_memcg(lruvec);
+ DEFINE_MIN_SEQ(lruvec); + DEFINE_MIN_SEQ(lruvec);
+ +
+ /* whether this lruvec is completely out of cold pages */ + /* whether this lruvec is completely out of cold folios */
+ if (min_seq[!can_swap] + MIN_NR_GENS > max_seq) { + if (min_seq[!can_swap] + MIN_NR_GENS > max_seq) {
+ *nr_to_scan = 0; + *nr_to_scan = 0;
+ return true; + return true;
@@ -90,7 +90,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+ int gen, type, zone; + int gen, type, zone;
+ unsigned long total = 0; + unsigned long total = 0;
+ bool can_swap = get_swappiness(lruvec, sc); + bool can_swap = get_swappiness(lruvec, sc);
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
struct mem_cgroup *memcg = lruvec_memcg(lruvec); struct mem_cgroup *memcg = lruvec_memcg(lruvec);
DEFINE_MAX_SEQ(lruvec); DEFINE_MAX_SEQ(lruvec);
DEFINE_MIN_SEQ(lruvec); DEFINE_MIN_SEQ(lruvec);
@@ -134,7 +134,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- if (!nr_to_scan && sc->priority != DEF_PRIORITY) - if (!nr_to_scan && sc->priority != DEF_PRIORITY)
- return false; - return false;
- } - }
+ /* see the comment on lru_gen_page */ + /* see the comment on lru_gen_folio */
+ gen = lru_gen_from_seq(min_seq[LRU_GEN_FILE]); + gen = lru_gen_from_seq(min_seq[LRU_GEN_FILE]);
+ birth = READ_ONCE(lruvec->lrugen.timestamps[gen]); + birth = READ_ONCE(lruvec->lrugen.timestamps[gen]);
@@ -242,7 +242,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- return nr_to_scan; - return nr_to_scan;
-done: -done:
- return min_seq[!can_swap] + MIN_NR_GENS <= max_seq ? nr_to_scan : 0; - return min_seq[!can_swap] + MIN_NR_GENS <= max_seq ? nr_to_scan : 0;
+ /* skip this lruvec as it's low on cold pages */ + /* skip this lruvec as it's low on cold folios */
+ return 0; + return 0;
} }
@@ -267,7 +267,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- goto done; - goto done;
+ break; + break;
delta = evict_pages(lruvec, sc, swappiness); delta = evict_folios(lruvec, sc, swappiness);
if (!delta) if (!delta)
- goto done; - goto done;
+ break; + break;

8
target/linux/generic/backport-6.1/020-v6.3-25-mm-multi-gen-LRU-shuffle-should_run_aging.patch
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@@ -32,11 +32,11 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- unsigned long old = 0; - unsigned long old = 0;
- unsigned long young = 0; - unsigned long young = 0;
- unsigned long total = 0; - unsigned long total = 0;
- struct lru_gen_page *lrugen = &lruvec->lrugen; - struct lru_gen_folio *lrugen = &lruvec->lrugen;
- struct mem_cgroup *memcg = lruvec_memcg(lruvec); - struct mem_cgroup *memcg = lruvec_memcg(lruvec);
- DEFINE_MIN_SEQ(lruvec); - DEFINE_MIN_SEQ(lruvec);
- -
- /* whether this lruvec is completely out of cold pages */ - /* whether this lruvec is completely out of cold folios */
- if (min_seq[!can_swap] + MIN_NR_GENS > max_seq) { - if (min_seq[!can_swap] + MIN_NR_GENS > max_seq) {
- *nr_to_scan = 0; - *nr_to_scan = 0;
- return true; - return true;
@@ -101,11 +101,11 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+ unsigned long old = 0; + unsigned long old = 0;
+ unsigned long young = 0; + unsigned long young = 0;
+ unsigned long total = 0; + unsigned long total = 0;
+ struct lru_gen_page *lrugen = &lruvec->lrugen; + struct lru_gen_folio *lrugen = &lruvec->lrugen;
+ struct mem_cgroup *memcg = lruvec_memcg(lruvec); + struct mem_cgroup *memcg = lruvec_memcg(lruvec);
+ DEFINE_MIN_SEQ(lruvec); + DEFINE_MIN_SEQ(lruvec);
+ +
+ /* whether this lruvec is completely out of cold pages */ + /* whether this lruvec is completely out of cold folios */
+ if (min_seq[!can_swap] + MIN_NR_GENS > max_seq) { + if (min_seq[!can_swap] + MIN_NR_GENS > max_seq) {
+ *nr_to_scan = 0; + *nr_to_scan = 0;
+ return true; + return true;

32
target/linux/generic/backport-6.1/020-v6.3-26-mm-multi-gen-LRU-per-node-lru_gen_page-lists.patch
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@@ -1,7 +1,7 @@
From fa6363828d314e837c5f79e97ea5e8c0d2f7f062 Mon Sep 17 00:00:00 2001 From fa6363828d314e837c5f79e97ea5e8c0d2f7f062 Mon Sep 17 00:00:00 2001
From: Yu Zhao <yuzhao@google.com> From: Yu Zhao <yuzhao@google.com>
Date: Wed, 21 Dec 2022 21:19:04 -0700 Date: Wed, 21 Dec 2022 21:19:04 -0700
Subject: [PATCH 26/29] mm: multi-gen LRU: per-node lru_gen_page lists Subject: [PATCH 26/29] mm: multi-gen LRU: per-node lru_gen_folio lists
For each node, memcgs are divided into two generations: the old and For each node, memcgs are divided into two generations: the old and
the young. For each generation, memcgs are randomly sharded into the young. For each generation, memcgs are randomly sharded into
@@ -63,7 +63,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
include/linux/mm_inline.h | 17 ++ include/linux/mm_inline.h | 17 ++
include/linux/mmzone.h | 117 +++++++++++- include/linux/mmzone.h | 117 +++++++++++-
mm/memcontrol.c | 16 ++ mm/memcontrol.c | 16 ++
mm/page_alloc.c | 1 + mm/folio_alloc.c | 1 +
mm/vmscan.c | 373 +++++++++++++++++++++++++++++++++---- mm/vmscan.c | 373 +++++++++++++++++++++++++++++++++----
6 files changed, 499 insertions(+), 35 deletions(-) 6 files changed, 499 insertions(+), 35 deletions(-)
@@ -123,7 +123,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+ return 0; + return 0;
+} +}
+ +
static inline bool lru_gen_add_page(struct lruvec *lruvec, struct page *page, bool reclaiming) static inline bool lru_gen_add_folio(struct lruvec *lruvec, struct folio *folio, bool reclaiming)
{ {
return false; return false;
--- a/include/linux/mmzone.h --- a/include/linux/mmzone.h
@@ -136,7 +136,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
#include <linux/wait.h> #include <linux/wait.h>
#include <linux/bitops.h> #include <linux/bitops.h>
#include <linux/cache.h> #include <linux/cache.h>
@@ -357,6 +358,15 @@ struct page_vma_mapped_walk; @@ -357,6 +358,15 @@ struct folio_vma_mapped_walk;
#define LRU_GEN_MASK ((BIT(LRU_GEN_WIDTH) - 1) << LRU_GEN_PGOFF) #define LRU_GEN_MASK ((BIT(LRU_GEN_WIDTH) - 1) << LRU_GEN_PGOFF)
#define LRU_REFS_MASK ((BIT(LRU_REFS_WIDTH) - 1) << LRU_REFS_PGOFF) #define LRU_REFS_MASK ((BIT(LRU_REFS_WIDTH) - 1) << LRU_REFS_PGOFF)
@@ -152,16 +152,16 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
#ifdef CONFIG_LRU_GEN #ifdef CONFIG_LRU_GEN
enum { enum {
@@ -416,6 +426,14 @@ struct lru_gen_page { @@ -416,6 +426,14 @@ struct lru_gen_folio {
atomic_long_t refaulted[NR_HIST_GENS][ANON_AND_FILE][MAX_NR_TIERS]; atomic_long_t refaulted[NR_HIST_GENS][ANON_AND_FILE][MAX_NR_TIERS];
/* whether the multi-gen LRU is enabled */ /* whether the multi-gen LRU is enabled */
bool enabled; bool enabled;
+#ifdef CONFIG_MEMCG +#ifdef CONFIG_MEMCG
+ /* the memcg generation this lru_gen_page belongs to */ + /* the memcg generation this lru_gen_folio belongs to */
+ u8 gen; + u8 gen;
+ /* the list segment this lru_gen_page belongs to */ + /* the list segment this lru_gen_folio belongs to */
+ u8 seg; + u8 seg;
+ /* per-node lru_gen_page list for global reclaim */ + /* per-node lru_gen_folio list for global reclaim */
+ struct hlist_nulls_node list; + struct hlist_nulls_node list;
+#endif +#endif
}; };
@@ -216,9 +216,9 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+struct lru_gen_memcg { +struct lru_gen_memcg {
+ /* the per-node memcg generation counter */ + /* the per-node memcg generation counter */
+ unsigned long seq; + unsigned long seq;
+ /* each memcg has one lru_gen_page per node */ + /* each memcg has one lru_gen_folio per node */
+ unsigned long nr_memcgs[MEMCG_NR_GENS]; + unsigned long nr_memcgs[MEMCG_NR_GENS];
+ /* per-node lru_gen_page list for global reclaim */ + /* per-node lru_gen_folio list for global reclaim */
+ struct hlist_nulls_head fifo[MEMCG_NR_GENS][MEMCG_NR_BINS]; + struct hlist_nulls_head fifo[MEMCG_NR_GENS][MEMCG_NR_BINS];
+ /* protects the above */ + /* protects the above */
+ spinlock_t lock; + spinlock_t lock;
@@ -294,7 +294,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
#ifdef CONFIG_LRU_GEN #ifdef CONFIG_LRU_GEN
/* kswap mm walk data */ /* kswap mm walk data */
struct lru_gen_mm_walk mm_walk; struct lru_gen_mm_walk mm_walk;
+ /* lru_gen_page list */ + /* lru_gen_folio list */
+ struct lru_gen_memcg memcg_lru; + struct lru_gen_memcg memcg_lru;
#endif #endif
@@ -306,7 +306,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
struct mem_cgroup_tree_per_node *mctz; struct mem_cgroup_tree_per_node *mctz;
+ if (lru_gen_enabled()) { + if (lru_gen_enabled()) {
+ struct lruvec *lruvec = &mem_cgroup_page_nodeinfo(memcg, page)->lruvec; + struct lruvec *lruvec = &memcg->nodeinfo[nid]->lruvec;
+ +
+ /* see the comment on MEMCG_NR_GENS */ + /* see the comment on MEMCG_NR_GENS */
+ if (soft_limit_excess(memcg) && lru_gen_memcg_seg(lruvec) != MEMCG_LRU_HEAD) + if (soft_limit_excess(memcg) && lru_gen_memcg_seg(lruvec) != MEMCG_LRU_HEAD)
@@ -315,7 +315,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+ return; + return;
+ } + }
+ +
mctz = soft_limit_tree_from_page(page); mctz = soft_limit_tree.rb_tree_per_node[nid];
if (!mctz) if (!mctz)
return; return;
@@ -3433,6 +3443,9 @@ unsigned long mem_cgroup_soft_limit_recl @@ -3433,6 +3443,9 @@ unsigned long mem_cgroup_soft_limit_recl
@@ -430,7 +430,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- try_to_inc_max_seq(lruvec, max_seq, sc, can_swap, false); - try_to_inc_max_seq(lruvec, max_seq, sc, can_swap, false);
- -
/* skip this lruvec as it's low on cold pages */ /* skip this lruvec as it's low on cold folios */
- return 0; - return 0;
+ return try_to_inc_max_seq(lruvec, max_seq, sc, can_swap, false) ? -1 : 0; + return try_to_inc_max_seq(lruvec, max_seq, sc, can_swap, false) ? -1 : 0;
} }
@@ -476,7 +476,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+ if (nr_to_scan <= 0) + if (nr_to_scan <= 0)
break; break;
delta = evict_pages(lruvec, sc, swappiness); delta = evict_folios(lruvec, sc, swappiness);
@@ -4912,10 +4895,250 @@ static void lru_gen_shrink_lruvec(struct @@ -4912,10 +4895,250 @@ static void lru_gen_shrink_lruvec(struct
cond_resched(); cond_resched();
} }
@@ -532,7 +532,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+ int bin; + int bin;
+ int first_bin; + int first_bin;
+ struct lruvec *lruvec; + struct lruvec *lruvec;
+ struct lru_gen_page *lrugen; + struct lru_gen_folio *lrugen;
+ const struct hlist_nulls_node *pos; + const struct hlist_nulls_node *pos;
+ int op = 0; + int op = 0;
+ struct mem_cgroup *memcg = NULL; + struct mem_cgroup *memcg = NULL;

28
target/linux/generic/backport-6.1/020-v6.3-27-mm-multi-gen-LRU-clarify-scan_control-flags.patch
View File

@@ -10,10 +10,10 @@ Among the flags in scan_control:
opportunistically skip the aging path, since it is considered less opportunistically skip the aging path, since it is considered less
latency sensitive. latency sensitive.
3. !(sc->gfp_mask & __GFP_IO), which indicates IO constraint, lowers 3. !(sc->gfp_mask & __GFP_IO), which indicates IO constraint, lowers
swappiness to prioritize file LRU, since clean file pages are more swappiness to prioritize file LRU, since clean file folios are more
likely to exist. likely to exist.
4. sc->may_writepage and sc->may_unmap, which indicates opportunistic 4. sc->may_writefolio and sc->may_unmap, which indicates opportunistic
reclaim, are rejected, since unmapped clean pages are already reclaim, are rejected, since unmapped clean folios are already
prioritized. Scanning for more of them is likely futile and can prioritized. Scanning for more of them is likely futile and can
cause high reclaim latency when there is a large number of memcgs. cause high reclaim latency when there is a large number of memcgs.
@@ -43,7 +43,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
+ return 0; + return 0;
+ +
if (!can_demote(pgdat->node_id, sc) && if (!can_demote(pgdat->node_id, sc) &&
mem_cgroup_get_nr_swap_pages(memcg) < MIN_LRU_BATCH) mem_cgroup_get_nr_swap_folios(memcg) < MIN_LRU_BATCH)
return 0; return 0;
@@ -3952,7 +3955,7 @@ static void walk_mm(struct lruvec *lruve @@ -3952,7 +3955,7 @@ static void walk_mm(struct lruvec *lruve
} while (err == -EAGAIN); } while (err == -EAGAIN);
@@ -78,24 +78,24 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- VM_WARN_ON_ONCE(sc->memcg_low_reclaim); - VM_WARN_ON_ONCE(sc->memcg_low_reclaim);
- -
/* see the comment on lru_gen_page */ /* see the comment on lru_gen_folio */
gen = lru_gen_from_seq(min_seq[LRU_GEN_FILE]); gen = lru_gen_from_seq(min_seq[LRU_GEN_FILE]);
birth = READ_ONCE(lruvec->lrugen.timestamps[gen]); birth = READ_ONCE(lruvec->lrugen.timestamps[gen]);
@@ -4472,12 +4473,8 @@ static bool isolate_page(struct lruvec * @@ -4472,12 +4473,8 @@ static bool isolate_folio(struct lruvec *
{ {
bool success; bool success;
- /* unmapping inhibited */ - /* unmapping inhibited */
- if (!sc->may_unmap && page_mapped(page)) - if (!sc->may_unmap && folio_mapped(folio))
- return false; - return false;
- -
/* swapping inhibited */ /* swapping inhibited */
- if (!(sc->may_writepage && (sc->gfp_mask & __GFP_IO)) && - if (!(sc->may_writepage && (sc->gfp_mask & __GFP_IO)) &&
+ if (!(sc->gfp_mask & __GFP_IO) && + if (!(sc->gfp_mask & __GFP_IO) &&
(PageDirty(page) || (folio_test_dirty(folio) ||
(PageAnon(page) && !PageSwapCache(page)))) (folio_test_anon(folio) && !folio_test_swapcache(folio))))
return false; return false;
@@ -4574,9 +4571,8 @@ static int scan_pages(struct lruvec *lru @@ -4574,9 +4571,8 @@ static int scan_folios(struct lruvec *lru
__count_vm_events(PGSCAN_ANON + type, isolated); __count_vm_events(PGSCAN_ANON + type, isolated);
/* /*
@@ -123,7 +123,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
unsigned long nr_to_reclaim = get_nr_to_reclaim(sc); unsigned long nr_to_reclaim = get_nr_to_reclaim(sc);
+ int swappiness = get_swappiness(lruvec, sc); + int swappiness = get_swappiness(lruvec, sc);
+ +
+ /* clean file pages are more likely to exist */ + /* clean file folios are more likely to exist */
+ if (swappiness && !(sc->gfp_mask & __GFP_IO)) + if (swappiness && !(sc->gfp_mask & __GFP_IO))
+ swappiness = 1; + swappiness = 1;
@@ -151,7 +151,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
blk_start_plug(&plug); blk_start_plug(&plug);
- set_mm_walk(lruvec_pgdat(lruvec)); - set_mm_walk(lruvec_pgdat(lruvec));
+ set_mm_walk(NULL, false); + set_mm_walk(NULL, sc->proactive);
if (try_to_shrink_lruvec(lruvec, sc)) if (try_to_shrink_lruvec(lruvec, sc))
lru_gen_rotate_memcg(lruvec, MEMCG_LRU_YOUNG); lru_gen_rotate_memcg(lruvec, MEMCG_LRU_YOUNG);
@@ -160,7 +160,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
VM_WARN_ON_ONCE(!global_reclaim(sc)); VM_WARN_ON_ONCE(!global_reclaim(sc));
+ /* + /*
+ * Unmapped clean pages are already prioritized. Scanning for more of + * Unmapped clean folios are already prioritized. Scanning for more of
+ * them is likely futile and can cause high reclaim latency when there + * them is likely futile and can cause high reclaim latency when there
+ * is a large number of memcgs. + * is a large number of memcgs.
+ */ + */
@@ -172,7 +172,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
blk_start_plug(&plug); blk_start_plug(&plug);
- set_mm_walk(pgdat); - set_mm_walk(pgdat);
+ set_mm_walk(pgdat, false); + set_mm_walk(NULL, sc->proactive);
set_initial_priority(pgdat, sc); set_initial_priority(pgdat, sc);

2
target/linux/generic/backport-6.1/020-v6.3-29-mm-multi-gen-LRU-avoid-futile-retries.patch
View File

@@ -34,7 +34,7 @@ Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
int bin; int bin;
int first_bin; int first_bin;
struct lruvec *lruvec; struct lruvec *lruvec;
struct lru_gen_page *lrugen; struct lru_gen_folio *lrugen;
+ struct mem_cgroup *memcg; + struct mem_cgroup *memcg;
const struct hlist_nulls_node *pos; const struct hlist_nulls_node *pos;
- int op = 0; - int op = 0;