From edaa53cac8fd4b96ed4b8f96c4933158ff2dd337 Mon Sep 17 00:00:00 2001 From: Zheng Liu Date: Tue, 25 Nov 2014 11:45:37 -0500 Subject: 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 Signed-off-by: Zheng Liu Signed-off-by: Jan Kara Signed-off-by: Theodore Ts'o --- fs/ext4/extents.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/ext4/extents.c') diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 1ee24d74270f..e406f66a903f 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -4632,7 +4632,7 @@ out2: trace_ext4_ext_map_blocks_exit(inode, flags, map, err ? err : allocated); - ext4_es_lru_add(inode); + ext4_es_list_add(inode); return err ? err : allocated; } @@ -5191,7 +5191,7 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, error = ext4_fill_fiemap_extents(inode, start_blk, len_blks, fieinfo); } - ext4_es_lru_add(inode); + ext4_es_list_add(inode); return error; } -- cgit v1.2.3