diff options
| author | Jaegeuk Kim | 2015-06-19 13:41:23 -0700 |
|---|---|---|
| committer | Jaegeuk Kim | 2015-08-04 14:09:55 -0700 |
| commit | 554df79e523d14dab475eb6650cb96617256ceea (patch) | |
| tree | ab8c8bbf5febf51534f809ef9df49fecfaf0e4a3 /fs/f2fs/data.c | |
| parent | 1b38dc8e74a366b92986755c304591e330f3c3e0 (diff) | |
f2fs: shrink extent_cache entries
This patch registers shrinking extent_caches.
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/data.c')
| -rw-r--r-- | fs/f2fs/data.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 982a1a58efd7..55b2a79b3526 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -767,7 +767,7 @@ out: update_inode_page(inode); } -void f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) +unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) { struct extent_tree *treevec[EXT_TREE_VEC_SIZE]; struct extent_node *en, *tmp; @@ -778,10 +778,7 @@ void f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) unsigned int node_cnt = 0, tree_cnt = 0; if (!test_opt(sbi, EXTENT_CACHE)) - return; - - if (available_free_memory(sbi, EXTENT_CACHE)) - return; + return 0; spin_lock(&sbi->extent_lock); list_for_each_entry_safe(en, tmp, &sbi->extent_list, list) { @@ -791,7 +788,9 @@ void f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) } spin_unlock(&sbi->extent_lock); - down_read(&sbi->extent_tree_lock); + if (!down_read_trylock(&sbi->extent_tree_lock)) + goto out; + while ((found = radix_tree_gang_lookup(&sbi->extent_tree_root, (void **)treevec, ino, EXT_TREE_VEC_SIZE))) { unsigned i; @@ -809,7 +808,9 @@ void f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) } up_read(&sbi->extent_tree_lock); - down_write(&sbi->extent_tree_lock); + if (!down_write_trylock(&sbi->extent_tree_lock)) + goto out; + radix_tree_for_each_slot(slot, &sbi->extent_tree_root, &iter, F2FS_ROOT_INO(sbi)) { struct extent_tree *et = (struct extent_tree *)*slot; @@ -822,8 +823,10 @@ void f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink) } } up_write(&sbi->extent_tree_lock); - +out: trace_f2fs_shrink_extent_tree(sbi, node_cnt, tree_cnt); + + return node_cnt + tree_cnt; } void f2fs_destroy_extent_tree(struct inode *inode) |