The list of all inodes on a mount is superfluous. We can traverse
all inodes now by walking the per-AG inode radix trees without
needing a separate list. This enables us to remove a bunch of
complex list traversal code and remove another two pointers from
Also, by replacing the sync traversal with an ascending inode
number traversal, we will issue better inode I/O patterns for
writeback triggered by xfssyncd or unmount.
Before we make this change, move all the relevant sync code
into it's own file in the linux-2.6/ directory. This aggregates
VFS specific sync interfacing in the one file and will allow
all the subsequent change history to be associated with this
file so it is easy to find in future.