f2fs: use extent_cache by default
We don't need to handle the duplicate extent information.
The integrated rule is:
- update on-disk extent with largest one tracked by in-memory extent_cache
- destroy extent_tree for the truncation case
- drop per-inode extent_cache by shrinker
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 9252022..0083b85 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -422,7 +422,6 @@
atomic_set(&fi->dirty_pages, 0);
fi->i_current_depth = 1;
fi->i_advise = 0;
- rwlock_init(&fi->ext_lock);
init_rwsem(&fi->i_sem);
INIT_RADIX_TREE(&fi->inmem_root, GFP_NOFS);
INIT_LIST_HEAD(&fi->inmem_pages);
@@ -453,12 +452,17 @@
*/
if (!inode_unhashed(inode) && inode->i_state & I_SYNC) {
if (!inode->i_nlink && !is_bad_inode(inode)) {
+ /* to avoid evict_inode call simultaneously */
+ atomic_inc(&inode->i_count);
spin_unlock(&inode->i_lock);
/* some remained atomic pages should discarded */
if (f2fs_is_atomic_file(inode))
commit_inmem_pages(inode, true);
+ /* should remain fi->extent_tree for writepage */
+ f2fs_destroy_extent_node(inode);
+
sb_start_intwrite(inode->i_sb);
i_size_write(inode, 0);
@@ -473,6 +477,7 @@
F2FS_I(inode)->i_crypt_info);
#endif
spin_lock(&inode->i_lock);
+ atomic_dec(&inode->i_count);
}
return 0;
}
@@ -721,6 +726,7 @@
set_opt(sbi, BG_GC);
set_opt(sbi, INLINE_DATA);
+ set_opt(sbi, EXTENT_CACHE);
#ifdef CONFIG_F2FS_FS_XATTR
set_opt(sbi, XATTR_USER);