[PATCH 0/5] log all file size updates

[Christoph Hellwig]

With more reports showing up that the VFS writeback code is not able
to write back our size updates dirtied from the I/O completion handler
in reasonable time I think it's time to move to logging all file size
updates ASAP, that is for 3.2 and maybe after a reasonable testing
period even -stable.

This series has been sent out a few times, and I've been doing QA on
it for weeks.  Note that I haven't implemented the log space reservations
from ->writepage - see the actual patch for the rationale.