HEADS UP: SUJ Going in to head today

[Jeff Roberson]

Hi Folks,

You may have seen my other Soft-updates journaling (SUJ) announcements. 
If not, it is a journaling system that works cooperatively with 
soft-updates to eliminate the full background filesystem check after an 
unclean shutdown.  SUJ may be enabled with tunefs -j enable and disabled 
with tunefs -j disable on an unmounted filesystem.  It is backwards 
compatible with soft-updates with no journal.

I'm going to do another round of tests and buildworld this afternoon to 
verify the diff and then I'm committing to head.  This is a very large 
feature and fundamentally changes softupdates.  Although it has been 
extensively tested by many there may be unforseen problems.  If you run 
into an issue that you think may be suj please email me directly as well 
as posting on current as I sometimes miss list email and this will ensure 
the quickest response.

Thanks,
Jeff