diff options
Diffstat (limited to 'fs/ext4/extents_status.c')
| -rw-r--r-- | fs/ext4/extents_status.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index 2d1bdbe78c04..3981ff783950 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -931,13 +931,15 @@ static int __ext4_es_shrink(struct ext4_sb_info *sbi, int nr_to_scan, struct ext4_inode_info *ei; struct list_head *cur, *tmp; LIST_HEAD(skipped); - int ret, nr_shrunk = 0; + int nr_shrunk = 0; int retried = 0, skip_precached = 1, nr_skipped = 0; spin_lock(&sbi->s_es_lru_lock); retry: list_for_each_safe(cur, tmp, &sbi->s_es_lru) { + int shrunk; + /* * If we have already reclaimed all extents from extent * status tree, just stop the loop immediately. @@ -964,13 +966,13 @@ retry: continue; write_lock(&ei->i_es_lock); - ret = __es_try_to_reclaim_extents(ei, nr_to_scan); + shrunk = __es_try_to_reclaim_extents(ei, nr_to_scan); if (ei->i_es_lru_nr == 0) list_del_init(&ei->i_es_lru); write_unlock(&ei->i_es_lock); - nr_shrunk += ret; - nr_to_scan -= ret; + nr_shrunk += shrunk; + nr_to_scan -= shrunk; if (nr_to_scan == 0) break; } @@ -1007,7 +1009,20 @@ retry: return nr_shrunk; } -static int ext4_es_shrink(struct shrinker *shrink, struct shrink_control *sc) +static unsigned long ext4_es_count(struct shrinker *shrink, + struct shrink_control *sc) +{ + unsigned long nr; + struct ext4_sb_info *sbi; + + sbi = container_of(shrink, struct ext4_sb_info, s_es_shrinker); + nr = percpu_counter_read_positive(&sbi->s_extent_cache_cnt); + trace_ext4_es_shrink_enter(sbi->s_sb, sc->nr_to_scan, nr); + return nr; +} + +static unsigned long ext4_es_scan(struct shrinker *shrink, + struct shrink_control *sc) { struct ext4_sb_info *sbi = container_of(shrink, struct ext4_sb_info, s_es_shrinker); @@ -1022,9 +1037,8 @@ static int ext4_es_shrink(struct shrinker *shrink, struct shrink_control *sc) nr_shrunk = __ext4_es_shrink(sbi, nr_to_scan, NULL); - ret = percpu_counter_read_positive(&sbi->s_extent_cache_cnt); trace_ext4_es_shrink_exit(sbi->s_sb, nr_shrunk, ret); - return ret; + return nr_shrunk; } void ext4_es_register_shrinker(struct ext4_sb_info *sbi) @@ -1032,7 +1046,8 @@ void ext4_es_register_shrinker(struct ext4_sb_info *sbi) INIT_LIST_HEAD(&sbi->s_es_lru); spin_lock_init(&sbi->s_es_lru_lock); sbi->s_es_last_sorted = 0; - sbi->s_es_shrinker.shrink = ext4_es_shrink; + sbi->s_es_shrinker.scan_objects = ext4_es_scan; + sbi->s_es_shrinker.count_objects = ext4_es_count; sbi->s_es_shrinker.seeks = DEFAULT_SEEKS; register_shrinker(&sbi->s_es_shrinker); } @@ -1076,7 +1091,7 @@ static int __es_try_to_reclaim_extents(struct ext4_inode_info *ei, struct ext4_es_tree *tree = &ei->i_es_tree; struct rb_node *node; struct extent_status *es; - int nr_shrunk = 0; + unsigned long nr_shrunk = 0; static DEFINE_RATELIMIT_STATE(_rs, DEFAULT_RATELIMIT_INTERVAL, DEFAULT_RATELIMIT_BURST); |