| compaction.c (c503c193db7d7ccc0c58b1ef694eaef331318149) | compaction.c (17adb230d6a6e39f9ba39440ee8441291795dff4) |
|---|---|
| 1// SPDX-License-Identifier: GPL-2.0 2/* 3 * linux/mm/compaction.c 4 * 5 * Memory compaction for the reduction of external fragmentation. Note that 6 * this heavily depends upon page migration to do all the real heavy 7 * lifting 8 * --- 1014 unchanged lines hidden (view full) --- 1023 1024 if (!__isolate_lru_page_prepare(page, isolate_mode)) 1025 goto isolate_fail_put; 1026 1027 /* Try isolate the page */ 1028 if (!TestClearPageLRU(page)) 1029 goto isolate_fail_put; 1030 | 1// SPDX-License-Identifier: GPL-2.0 2/* 3 * linux/mm/compaction.c 4 * 5 * Memory compaction for the reduction of external fragmentation. Note that 6 * this heavily depends upon page migration to do all the real heavy 7 * lifting 8 * --- 1014 unchanged lines hidden (view full) --- 1023 1024 if (!__isolate_lru_page_prepare(page, isolate_mode)) 1025 goto isolate_fail_put; 1026 1027 /* Try isolate the page */ 1028 if (!TestClearPageLRU(page)) 1029 goto isolate_fail_put; 1030 |
| 1031 lruvec = mem_cgroup_page_lruvec(page, pgdat); | 1031 lruvec = mem_cgroup_page_lruvec(page); |
| 1032 1033 /* If we already hold the lock, we can skip some rechecking */ 1034 if (lruvec != locked) { 1035 if (locked) 1036 unlock_page_lruvec_irqrestore(locked, flags); 1037 1038 compact_lock_irqsave(&lruvec->lru_lock, &flags, cc); 1039 locked = lruvec; --- 910 unchanged lines hidden (view full) --- 1950 */ 1951static inline bool is_via_compact_memory(int order) 1952{ 1953 return order == -1; 1954} 1955 1956static bool kswapd_is_running(pg_data_t *pgdat) 1957{ | 1032 1033 /* If we already hold the lock, we can skip some rechecking */ 1034 if (lruvec != locked) { 1035 if (locked) 1036 unlock_page_lruvec_irqrestore(locked, flags); 1037 1038 compact_lock_irqsave(&lruvec->lru_lock, &flags, cc); 1039 locked = lruvec; --- 910 unchanged lines hidden (view full) --- 1950 */ 1951static inline bool is_via_compact_memory(int order) 1952{ 1953 return order == -1; 1954} 1955 1956static bool kswapd_is_running(pg_data_t *pgdat) 1957{ |
| 1958 return pgdat->kswapd && task_is_running(pgdat->kswapd); | 1958 return pgdat->kswapd && (pgdat->kswapd->state == TASK_RUNNING); |
| 1959} 1960 1961/* 1962 * A zone's fragmentation score is the external fragmentation wrt to the 1963 * COMPACTION_HPAGE_ORDER. It returns a value in the range [0, 100]. 1964 */ 1965static unsigned int fragmentation_score_zone(struct zone *zone) 1966{ --- 750 unchanged lines hidden (view full) --- 2717{ 2718 if (write) 2719 compact_nodes(); 2720 2721 return 0; 2722} 2723 2724#if defined(CONFIG_SYSFS) && defined(CONFIG_NUMA) | 1959} 1960 1961/* 1962 * A zone's fragmentation score is the external fragmentation wrt to the 1963 * COMPACTION_HPAGE_ORDER. It returns a value in the range [0, 100]. 1964 */ 1965static unsigned int fragmentation_score_zone(struct zone *zone) 1966{ --- 750 unchanged lines hidden (view full) --- 2717{ 2718 if (write) 2719 compact_nodes(); 2720 2721 return 0; 2722} 2723 2724#if defined(CONFIG_SYSFS) && defined(CONFIG_NUMA) |
| 2725static ssize_t sysfs_compact_node(struct device *dev, 2726 struct device_attribute *attr, 2727 const char *buf, size_t count) | 2725static ssize_t compact_store(struct device *dev, 2726 struct device_attribute *attr, 2727 const char *buf, size_t count) |
| 2728{ 2729 int nid = dev->id; 2730 2731 if (nid >= 0 && nid < nr_node_ids && node_online(nid)) { 2732 /* Flush pending updates to the LRU lists */ 2733 lru_add_drain_all(); 2734 2735 compact_node(nid); 2736 } 2737 2738 return count; 2739} | 2728{ 2729 int nid = dev->id; 2730 2731 if (nid >= 0 && nid < nr_node_ids && node_online(nid)) { 2732 /* Flush pending updates to the LRU lists */ 2733 lru_add_drain_all(); 2734 2735 compact_node(nid); 2736 } 2737 2738 return count; 2739} |
| 2740static DEVICE_ATTR(compact, 0200, NULL, sysfs_compact_node); | 2740static DEVICE_ATTR_WO(compact); |
| 2741 2742int compaction_register_node(struct node *node) 2743{ 2744 return device_create_file(&node->dev, &dev_attr_compact); 2745} 2746 2747void compaction_unregister_node(struct node *node) 2748{ --- 268 unchanged lines hidden --- | 2741 2742int compaction_register_node(struct node *node) 2743{ 2744 return device_create_file(&node->dev, &dev_attr_compact); 2745} 2746 2747void compaction_unregister_node(struct node *node) 2748{ --- 268 unchanged lines hidden --- |