linux-5.15/shrink_node_memcgs() の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• linux-5.15/shrink_node_memcgs() へ行く。
• linux-5.15/shrink_node_memcgs() の差分を削除

#author("2025-09-11T18:11:49+09:00","default:guest","guest")
#author("2025-09-11T18:12:30+09:00","default:guest","guest")
*参照元 [#nb0f8385]
#backlinks

*説明 [#k15629a9]
-パス: [[linux-5.15/mm/vmscan.c]]

-FIXME: これは何？
--説明


**引数 [#s3427218]
-pg_data_t *pgdat
--メモリノード。
--[[linux-5.15/pg_data_t]]
-struct scan_control *sc
--
--[[linux-5.15/scan_control]]


**返り値 [#r8f231f8]
-なし


**参考 [#d1fdffc7]


*実装 [#x487257f]

 static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc)
 {
 	struct mem_cgroup *target_memcg = sc->target_mem_cgroup;
 	struct mem_cgroup *memcg;
 
 	memcg = mem_cgroup_iter(target_memcg, NULL, NULL);
-
--[[linux-5.15/mem_cgroup]]
--[[linux-5.15/mem_cgroup_iter()]]

 	do {
 		struct lruvec *lruvec = mem_cgroup_lruvec(memcg, pgdat);
 		unsigned long reclaimed;
 		unsigned long scanned;
 
-
--[[linux-5.15/mem_cgroup_lruvec()]]

 		/*
 		 * This loop can become CPU-bound when target memcgs
 		 * aren't eligible for reclaim - either because they
 		 * don't have any reclaimable pages, or because their
 		 * memory is explicitly protected. Avoid soft lockups.
 		 */
 		cond_resched();
 
 		mem_cgroup_calculate_protection(target_memcg, memcg);
 
-
--[[linux-5.15/cond_resched()]]
--[[linux-5.15/mem_cgroup_calculate_protection()]]

 		if (mem_cgroup_below_min(memcg)) {
 			/*
 			 * Hard protection.
 			 * If there is no reclaimable memory, OOM.
 			 */
 			continue;
-
--[[linux-5.15/mem_cgroup_below_min()]]

 		} else if (mem_cgroup_below_low(memcg)) {
 			/*
 			 * Soft protection.
 			 * Respect the protection only as long as
 			 * there is an unprotected supply
 			 * of reclaimable memory from other cgroups.
 			 */
 			if (!sc->memcg_low_reclaim) {
 				sc->memcg_low_skipped = 1;
 				continue;
 			}
 			memcg_memory_event(memcg, MEMCG_LOW);
-
--[[linux-5.15/mem_cgroup_below_low()]]
--[[linux-5.15/memcg_memory_event()]]

 		}
 
 		reclaimed = sc->nr_reclaimed;
 		scanned = sc->nr_scanned;
 
 		shrink_lruvec(lruvec, sc);
 
 		shrink_slab(sc->gfp_mask, pgdat->node_id, memcg,
 			    sc->priority);
 
-
--[[linux-5.15/shrink_lruvec()]]
--[[linux-5.15/shrink_slab()]]

 		/* Record the group's reclaim efficiency */
 		vmpressure(sc->gfp_mask, memcg, false,
 			   sc->nr_scanned - scanned,
 			   sc->nr_reclaimed - reclaimed);
 
 	} while ((memcg = mem_cgroup_iter(target_memcg, memcg, NULL)));
 }

-
--[[linux-5.15/vmpressure()]]
--[[linux-5.15/mem_cgroup_iter()]]


*コメント [#oea662d3]