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- #define GC_THREAD_MIN_WB_PAGES 1
- #define DEF_GC_THREAD_URGENT_SLEEP_TIME 500
- #define DEF_GC_THREAD_MIN_SLEEP_TIME 30000
- #define DEF_GC_THREAD_MAX_SLEEP_TIME 60000
- #define DEF_GC_THREAD_NOGC_SLEEP_TIME 300000
- #define DEF_GC_THREAD_AGE_THRESHOLD (60 * 60 * 24 * 7)
- #define DEF_GC_THREAD_CANDIDATE_RATIO 20
- #define DEF_GC_THREAD_MAX_CANDIDATE_COUNT 10
- #define DEF_GC_THREAD_AGE_WEIGHT 60
- #define DEFAULT_ACCURACY_CLASS 10000
- #define LIMIT_INVALID_BLOCK 40
- #define LIMIT_FREE_BLOCK 40
- #define DEF_GC_FAILED_PINNED_FILES 2048
- #define DEF_MAX_VICTIM_SEARCH 4096
- #define NR_GC_CHECKPOINT_SECS (3)
- struct f2fs_gc_kthread {
- struct task_struct *f2fs_gc_task;
- wait_queue_head_t gc_wait_queue_head;
-
- unsigned int urgent_sleep_time;
- unsigned int min_sleep_time;
- unsigned int max_sleep_time;
- unsigned int no_gc_sleep_time;
-
- bool gc_wake;
-
- wait_queue_head_t fggc_wq;
- };
- struct gc_inode_list {
- struct list_head ilist;
- struct radix_tree_root iroot;
- };
- struct victim_entry {
- struct rb_node rb_node;
- unsigned long long mtime;
- unsigned int segno;
- struct list_head list;
- };
- static inline block_t free_segs_blk_count_zoned(struct f2fs_sb_info *sbi)
- {
- block_t free_seg_blks = 0;
- struct free_segmap_info *free_i = FREE_I(sbi);
- int j;
- spin_lock(&free_i->segmap_lock);
- for (j = 0; j < MAIN_SEGS(sbi); j++)
- if (!test_bit(j, free_i->free_segmap))
- free_seg_blks += f2fs_usable_blks_in_seg(sbi, j);
- spin_unlock(&free_i->segmap_lock);
- return free_seg_blks;
- }
- static inline block_t free_segs_blk_count(struct f2fs_sb_info *sbi)
- {
- if (f2fs_sb_has_blkzoned(sbi))
- return free_segs_blk_count_zoned(sbi);
- return free_segments(sbi) << sbi->log_blocks_per_seg;
- }
- static inline block_t free_user_blocks(struct f2fs_sb_info *sbi)
- {
- block_t free_blks, ovp_blks;
- free_blks = free_segs_blk_count(sbi);
- ovp_blks = overprovision_segments(sbi) << sbi->log_blocks_per_seg;
- if (free_blks < ovp_blks)
- return 0;
- return free_blks - ovp_blks;
- }
- static inline block_t limit_invalid_user_blocks(block_t user_block_count)
- {
- return (long)(user_block_count * LIMIT_INVALID_BLOCK) / 100;
- }
- static inline block_t limit_free_user_blocks(block_t reclaimable_user_blocks)
- {
- return (long)(reclaimable_user_blocks * LIMIT_FREE_BLOCK) / 100;
- }
- static inline void increase_sleep_time(struct f2fs_gc_kthread *gc_th,
- unsigned int *wait)
- {
- unsigned int min_time = gc_th->min_sleep_time;
- unsigned int max_time = gc_th->max_sleep_time;
- if (*wait == gc_th->no_gc_sleep_time)
- return;
- if ((long long)*wait + (long long)min_time > (long long)max_time)
- *wait = max_time;
- else
- *wait += min_time;
- }
- static inline void decrease_sleep_time(struct f2fs_gc_kthread *gc_th,
- unsigned int *wait)
- {
- unsigned int min_time = gc_th->min_sleep_time;
- if (*wait == gc_th->no_gc_sleep_time)
- *wait = gc_th->max_sleep_time;
- if ((long long)*wait - (long long)min_time < (long long)min_time)
- *wait = min_time;
- else
- *wait -= min_time;
- }
- static inline bool has_enough_invalid_blocks(struct f2fs_sb_info *sbi)
- {
- block_t user_block_count = sbi->user_block_count;
- block_t invalid_user_blocks = user_block_count -
- written_block_count(sbi);
-
- return (invalid_user_blocks >
- limit_invalid_user_blocks(user_block_count) &&
- free_user_blocks(sbi) <
- limit_free_user_blocks(invalid_user_blocks));
- }
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