Commit b74a120b authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton
Browse files

mm/damon/core: implement DAMOS_QUOTA_NODE_MEMCG_USED_BP 

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: default avatarSeongJae Park <sj@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 6a18bbe4

mm/damon/core.c

+42 −0
Original line number Diff line number Diff line
@@ -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;

	}