[PATCH 9/9] xfs: factor xlog_write and make use of new log vector structure

[Christoph Hellwig]

On Sat, Mar 06, 2010 at 12:51:24PM +1100, Dave Chinner wrote:
> From: Dave Chinner <dchinner at redhat.com>
> 
> xlog_write is a mess that takes a lot of effort to understand. It is
> a mass of nested loops with 4 space indents to get it to fit in 80 columns
> and lots of funky variables that aren't obvious what they mean or do.
> 
> Break it down into understandable chunks, format them properly and propagate
> the new log vector structure into it to support chaining of log vectors.

This looks good to me, but I have a bit of a hard time to verify it.

As mention before I think this would be much better off as one
patch to split up xlog_write to go in before patch 8, and a separate
one to deal with the xfs_log_vecs, which could in fact be merged into
the existing patch 8, just to be reordered to be last - or even first
of the actual delayed logging series.