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authorKinsey Ho <kinseyho@google.com>2023-12-27 14:12:03 +0000
committerAndrew Morton <akpm@linux-foundation.org>2024-01-05 10:17:44 -0800
commit745b13e647cd119e70d16b57698e12b7c86ca264 (patch)
treeafeb17988d05472226ac40144b0ed65a0e9b5992 /mm
parent61dd3f246b3adaabff3241c586f2210ac91b05a4 (diff)
mm/mglru: remove CONFIG_MEMCG
Remove CONFIG_MEMCG in a refactoring to improve code readability at the cost of a few bytes in struct lru_gen_folio per node when CONFIG_MEMCG=n. Link: https://lkml.kernel.org/r/20231227141205.2200125-4-kinseyho@google.com Signed-off-by: Kinsey Ho <kinseyho@google.com> Co-developed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Tested-by: Donet Tom <donettom@linux.vnet.ibm.com> Acked-by: Yu Zhao <yuzhao@google.com> Cc: kernel test robot <lkp@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/vmscan.c67
1 files changed, 21 insertions, 46 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index aa7ea09ffb4c..351a0b5043c0 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -4097,13 +4097,6 @@ enum {
MEMCG_LRU_YOUNG,
};
-#ifdef CONFIG_MEMCG
-
-static int lru_gen_memcg_seg(struct lruvec *lruvec)
-{
- return READ_ONCE(lruvec->lrugen.seg);
-}
-
static void lru_gen_rotate_memcg(struct lruvec *lruvec, int op)
{
int seg;
@@ -4150,6 +4143,8 @@ static void lru_gen_rotate_memcg(struct lruvec *lruvec, int op)
spin_unlock_irqrestore(&pgdat->memcg_lru.lock, flags);
}
+#ifdef CONFIG_MEMCG
+
void lru_gen_online_memcg(struct mem_cgroup *memcg)
{
int gen;
@@ -4217,18 +4212,11 @@ void lru_gen_soft_reclaim(struct mem_cgroup *memcg, int nid)
struct lruvec *lruvec = get_lruvec(memcg, nid);
/* see the comment on MEMCG_NR_GENS */
- if (lru_gen_memcg_seg(lruvec) != MEMCG_LRU_HEAD)
+ if (READ_ONCE(lruvec->lrugen.seg) != MEMCG_LRU_HEAD)
lru_gen_rotate_memcg(lruvec, MEMCG_LRU_HEAD);
}
-#else /* !CONFIG_MEMCG */
-
-static int lru_gen_memcg_seg(struct lruvec *lruvec)
-{
- return 0;
-}
-
-#endif
+#endif /* CONFIG_MEMCG */
/******************************************************************************
* the eviction
@@ -4776,7 +4764,7 @@ static int shrink_one(struct lruvec *lruvec, struct scan_control *sc)
if (mem_cgroup_below_low(NULL, memcg)) {
/* see the comment on MEMCG_NR_GENS */
- if (lru_gen_memcg_seg(lruvec) != MEMCG_LRU_TAIL)
+ if (READ_ONCE(lruvec->lrugen.seg) != MEMCG_LRU_TAIL)
return MEMCG_LRU_TAIL;
memcg_memory_event(memcg, MEMCG_LOW);
@@ -4799,12 +4787,10 @@ static int shrink_one(struct lruvec *lruvec, struct scan_control *sc)
return 0;
/* one retry if offlined or too small */
- return lru_gen_memcg_seg(lruvec) != MEMCG_LRU_TAIL ?
+ return READ_ONCE(lruvec->lrugen.seg) != MEMCG_LRU_TAIL ?
MEMCG_LRU_TAIL : MEMCG_LRU_YOUNG;
}
-#ifdef CONFIG_MEMCG
-
static void shrink_many(struct pglist_data *pgdat, struct scan_control *sc)
{
int op;
@@ -4896,20 +4882,6 @@ static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc
blk_finish_plug(&plug);
}
-#else /* !CONFIG_MEMCG */
-
-static void shrink_many(struct pglist_data *pgdat, struct scan_control *sc)
-{
- BUILD_BUG();
-}
-
-static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)
-{
- BUILD_BUG();
-}
-
-#endif
-
static void set_initial_priority(struct pglist_data *pgdat, struct scan_control *sc)
{
int priority;
@@ -5560,6 +5532,18 @@ static const struct file_operations lru_gen_ro_fops = {
* initialization
******************************************************************************/
+void lru_gen_init_pgdat(struct pglist_data *pgdat)
+{
+ int i, j;
+
+ spin_lock_init(&pgdat->memcg_lru.lock);
+
+ for (i = 0; i < MEMCG_NR_GENS; i++) {
+ for (j = 0; j < MEMCG_NR_BINS; j++)
+ INIT_HLIST_NULLS_HEAD(&pgdat->memcg_lru.fifo[i][j], i);
+ }
+}
+
void lru_gen_init_lruvec(struct lruvec *lruvec)
{
int i;
@@ -5582,18 +5566,6 @@ void lru_gen_init_lruvec(struct lruvec *lruvec)
#ifdef CONFIG_MEMCG
-void lru_gen_init_pgdat(struct pglist_data *pgdat)
-{
- int i, j;
-
- spin_lock_init(&pgdat->memcg_lru.lock);
-
- for (i = 0; i < MEMCG_NR_GENS; i++) {
- for (j = 0; j < MEMCG_NR_BINS; j++)
- INIT_HLIST_NULLS_HEAD(&pgdat->memcg_lru.fifo[i][j], i);
- }
-}
-
void lru_gen_init_memcg(struct mem_cgroup *memcg)
{
struct lru_gen_mm_list *mm_list = get_mm_list(memcg);
@@ -5653,14 +5625,17 @@ late_initcall(init_lru_gen);
static void lru_gen_age_node(struct pglist_data *pgdat, struct scan_control *sc)
{
+ BUILD_BUG();
}
static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)
{
+ BUILD_BUG();
}
static void lru_gen_shrink_node(struct pglist_data *pgdat, struct scan_control *sc)
{
+ BUILD_BUG();
}
#endif /* CONFIG_LRU_GEN */