Does JFS work like the ext3 writeback mode or the ordered mode?

Question

I know that the Journaled File System (JFS) does only journaling of the metadata.

But does JFS under Linux work like the ext3 writeback mode or like the ordered mode?

Answer 1

It is similar to ordered mode as per Journaling file systems.

So it works like ordered mode.

For a more detailed comparison you can browse the source of inode.c for JFS and inode.c for ext3, along with other files in the respective filesystem directories.