[PATCH 07/18] xfs: don't use vfs writeback for pure metadata modifications

[Dave Chinner]

On Tue, Sep 14, 2010 at 10:54:47AM -0400, Christoph Hellwig wrote:
> On Tue, Sep 14, 2010 at 08:56:06PM +1000, Dave Chinner wrote:
> > Hence we can stop marking VFS inodes dirty during transaction commit or when
> > changing timestamps during transactions. This will keep the inodes in the
> > superblock dirty list to those containing data or unlogged metadata changes.
> 
> But we also use xfs_ichgtime for non-transacion size updates, e.g.
> for truncate of zero length files.  With this patch we lose track of
> the timestamp updates for this case.

Oh, I missed that one in the twisty passages of the setattr code.
I'll do another (more careful) pass across all the callers, and for
those that are outside a transaction I'll add a separate call to
xfs_mark_inode_dirty_sync() for them.

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com