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mm/damon/core: implement DAMOS_QUOTA_NODE_MEMCG_USED_BP

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Implement the handling of the new DAMOS quota goal metric for per-memcg
per-node memory usage, namely DAMOS_QUOTA_NODE_MEMCG_USED_BP.  The metric
value is calculated as the sum of active/inactive anon/file pages of the
given cgroup for a given NUMA node.

Link: https://lkml.kernel.org/r/20251017212706.183502-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park
2025-10-17 14:26:55 -07:00
committed by Andrew Morton
parent 6a18bbe483
commit b74a120bcf
1 changed files with 42 additions and 0 deletions
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42
mm/damon/core.c
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@@ -10,6 +10,7 @@
#include <linux/damon.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/memcontrol.h>
#include <linux/mm.h>
#include <linux/psi.h>
#include <linux/slab.h>
@@ -788,6 +789,10 @@ static void damos_commit_quota_goal_union(
case DAMOS_QUOTA_NODE_MEM_FREE_BP:
dst->nid = src->nid;
break;
case DAMOS_QUOTA_NODE_MEMCG_USED_BP:
dst->nid = src->nid;
dst->memcg_id = src->memcg_id;
break;
default:
break;
}
@@ -2035,12 +2040,46 @@ static __kernel_ulong_t damos_get_node_mem_bp(
numerator = i.freeram;
return numerator * 10000 / i.totalram;
}
static unsigned long damos_get_node_memcg_used_bp(
struct damos_quota_goal *goal)
{
struct mem_cgroup *memcg;
struct lruvec *lruvec;
unsigned long used_pages;
struct sysinfo i;
rcu_read_lock();
memcg = mem_cgroup_from_id(goal->memcg_id);
rcu_read_unlock();
if (!memcg) {
if (goal->metric == DAMOS_QUOTA_NODE_MEMCG_USED_BP)
return 0;
else /* DAMOS_QUOTA_NODE_MEMCG_FREE_BP */
return 10000;
}
mem_cgroup_flush_stats(memcg);
lruvec = mem_cgroup_lruvec(memcg, NODE_DATA(goal->nid));
used_pages = lruvec_page_state(lruvec, NR_ACTIVE_ANON);
used_pages += lruvec_page_state(lruvec, NR_INACTIVE_ANON);
used_pages += lruvec_page_state(lruvec, NR_ACTIVE_FILE);
used_pages += lruvec_page_state(lruvec, NR_INACTIVE_FILE);
si_meminfo_node(&i, goal->nid);
return used_pages * 10000 / i.totalram;
}
#else
static __kernel_ulong_t damos_get_node_mem_bp(
struct damos_quota_goal *goal)
{
return 0;
}
static unsigned long damos_get_node_memcg_used_bp(
struct damos_quota_goal *goal)
{
return 0;
}
#endif
@@ -2061,6 +2100,9 @@ static void damos_set_quota_goal_current_value(struct damos_quota_goal *goal)
case DAMOS_QUOTA_NODE_MEM_FREE_BP:
goal->current_value = damos_get_node_mem_bp(goal);
break;
case DAMOS_QUOTA_NODE_MEMCG_USED_BP:
goal->current_value = damos_get_node_memcg_used_bp(goal);
break;
default:
break;
}