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| author | Zheng Liu <wenqing.lz@taobao.com> | 2014-11-25 17:45:37 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-11-25 17:45:37 +0100 |
| commit | edaa53cac8fd4b96ed4b8f96c4933158ff2dd337 (patch) | |
| tree | f414417ca79fe9678743ea5af75bd5afb70ad8cd /fs/ext4/super.c | |
| parent | ext4: cache extent hole in extent status tree for ext4_da_map_blocks() (diff) | |
| download | linux-edaa53cac8fd4b96ed4b8f96c4933158ff2dd337.tar.xz linux-edaa53cac8fd4b96ed4b8f96c4933158ff2dd337.zip | |
ext4: change LRU to round-robin in extent status tree shrinker
In this commit we discard the lru algorithm for inodes with extent
status tree because it takes significant effort to maintain a lru list
in extent status tree shrinker and the shrinker can take a long time to
scan this lru list in order to reclaim some objects.
We replace the lru ordering with a simple round-robin. After that we
never need to keep a lru list. That means that the list needn't be
sorted if the shrinker can not reclaim any objects in the first round.
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/super.c')
| -rw-r--r-- | fs/ext4/super.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 4b79f39ebf66..32df08e99ca9 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -871,10 +871,9 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) spin_lock_init(&ei->i_prealloc_lock); ext4_es_init_tree(&ei->i_es_tree); rwlock_init(&ei->i_es_lock); - INIT_LIST_HEAD(&ei->i_es_lru); + INIT_LIST_HEAD(&ei->i_es_list); ei->i_es_all_nr = 0; - ei->i_es_lru_nr = 0; - ei->i_touch_when = 0; + ei->i_es_shk_nr = 0; ei->i_reserved_data_blocks = 0; ei->i_reserved_meta_blocks = 0; ei->i_allocated_meta_blocks = 0; @@ -963,7 +962,7 @@ void ext4_clear_inode(struct inode *inode) dquot_drop(inode); ext4_discard_preallocations(inode); ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); - ext4_es_lru_del(inode); + ext4_es_list_del(inode); if (EXT4_I(inode)->jinode) { jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), EXT4_I(inode)->jinode); |