Commit 3104af35 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: reduce covered region of sbi->cp_rwsem in f2fs_map_blocks



Only cover sbi->cp_rwsem on one dnode page's allocation and modification
instead of multiple's in f2fs_map_blocks, it can reduce the covered region
of cp_rwsem, then we can avoid potential long time delay for concurrent
checkpointer.
Signed-off-by: default avatarChao Yu <chao2.yu@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 93bae099
......@@ -590,7 +590,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
}
if (create)
f2fs_lock_op(F2FS_I_SB(inode));
f2fs_lock_op(sbi);
/* When reading holes, we need its node page */
set_new_dnode(&dn, inode, NULL, NULL, 0);
......@@ -647,6 +647,11 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
allocated = false;
f2fs_put_dnode(&dn);
if (create) {
f2fs_unlock_op(sbi);
f2fs_lock_op(sbi);
}
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = get_dnode_of_data(&dn, pgofs, mode);
if (err) {
......@@ -702,7 +707,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
f2fs_put_dnode(&dn);
unlock_out:
if (create)
f2fs_unlock_op(F2FS_I_SB(inode));
f2fs_unlock_op(sbi);
out:
trace_f2fs_map_blocks(inode, map, err);
return err;
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment