diff options
Diffstat (limited to 'fs/f2fs/gc.h')
-rw-r--r-- | fs/f2fs/gc.h | 98 |
1 files changed, 82 insertions, 16 deletions
diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h index bbac9d3787bd..19b956c2d697 100644 --- a/fs/f2fs/gc.h +++ b/fs/f2fs/gc.h @@ -1,4 +1,4 @@ -// SPDX-License-Identifier: GPL-2.0 +/* SPDX-License-Identifier: GPL-2.0 */ /* * fs/f2fs/gc.h * @@ -14,6 +14,14 @@ #define DEF_GC_THREAD_MIN_SLEEP_TIME 30000 /* milliseconds */ #define DEF_GC_THREAD_MAX_SLEEP_TIME 60000 #define DEF_GC_THREAD_NOGC_SLEEP_TIME 300000 /* wait 5 min */ + +/* choose candidates from sections which has age of more than 7 days */ +#define DEF_GC_THREAD_AGE_THRESHOLD (60 * 60 * 24 * 7) +#define DEF_GC_THREAD_CANDIDATE_RATIO 20 /* select 20% oldest sections as candidates */ +#define DEF_GC_THREAD_MAX_CANDIDATE_COUNT 10 /* select at most 10 sections as candidates */ +#define DEF_GC_THREAD_AGE_WEIGHT 60 /* age weight */ +#define DEFAULT_ACCURACY_CLASS 10000 /* accuracy class */ + #define LIMIT_INVALID_BLOCK 40 /* percentage over total user space */ #define LIMIT_FREE_BLOCK 40 /* percentage over invalid + free space */ @@ -34,6 +42,12 @@ struct f2fs_gc_kthread { /* for changing gc mode */ unsigned int gc_wake; + + /* for GC_MERGE mount option */ + wait_queue_head_t fggc_wq; /* + * caller of f2fs_balance_fs() + * will wait on this wait queue. + */ }; struct gc_inode_list { @@ -41,27 +55,78 @@ struct gc_inode_list { struct radix_tree_root iroot; }; +struct victim_info { + unsigned long long mtime; /* mtime of section */ + unsigned int segno; /* section No. */ +}; + +struct victim_entry { + struct rb_node rb_node; /* rb node located in rb-tree */ + union { + struct { + unsigned long long mtime; /* mtime of section */ + unsigned int segno; /* segment No. */ + }; + struct victim_info vi; /* victim info */ + }; + struct list_head list; +}; + /* * inline functions */ + +/* + * On a Zoned device zone-capacity can be less than zone-size and if + * zone-capacity is not aligned to f2fs segment size(2MB), then the segment + * starting just before zone-capacity has some blocks spanning across the + * zone-capacity, these blocks are not usable. + * Such spanning segments can be in free list so calculate the sum of usable + * blocks in currently free segments including normal and spanning segments. + */ +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) { - if (free_segments(sbi) < overprovision_segments(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; - else - return (free_segments(sbi) - overprovision_segments(sbi)) - << sbi->log_blocks_per_seg; + + return free_blks - ovp_blks; } -static inline block_t limit_invalid_user_blocks(struct f2fs_sb_info *sbi) +static inline block_t limit_invalid_user_blocks(block_t user_block_count) { - return (long)(sbi->user_block_count * LIMIT_INVALID_BLOCK) / 100; + return (long)(user_block_count * LIMIT_INVALID_BLOCK) / 100; } -static inline block_t limit_free_user_blocks(struct f2fs_sb_info *sbi) +static inline block_t limit_free_user_blocks(block_t reclaimable_user_blocks) { - block_t reclaimable_user_blocks = sbi->user_block_count - - written_block_count(sbi); return (long)(reclaimable_user_blocks * LIMIT_FREE_BLOCK) / 100; } @@ -96,15 +161,16 @@ static inline void decrease_sleep_time(struct f2fs_gc_kthread *gc_th, static inline bool has_enough_invalid_blocks(struct f2fs_sb_info *sbi) { - block_t invalid_user_blocks = sbi->user_block_count - - written_block_count(sbi); + block_t user_block_count = sbi->user_block_count; + block_t invalid_user_blocks = user_block_count - + written_block_count(sbi); /* * Background GC is triggered with the following conditions. * 1. There are a number of invalid blocks. * 2. There is not enough free space. */ - if (invalid_user_blocks > limit_invalid_user_blocks(sbi) && - free_user_blocks(sbi) < limit_free_user_blocks(sbi)) - return true; - return false; + return (invalid_user_blocks > + limit_invalid_user_blocks(user_block_count) && + free_user_blocks(sbi) < + limit_free_user_blocks(invalid_user_blocks)); } |