HEADS UP: SUJ Going in to head today
jroberson at jroberson.net
Wed Apr 21 07:29:47 UTC 2010
On Tue, 20 Apr 2010, Patrick Tracanelli wrote:
> Jeff Roberson escreveu:
>> 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.
> Hello Jeff, McKusick and others envolved.
> Is an MFC technically possible? If so, are there plans to do so?
I do have an 8 backport branch available although it is a little stale. I
intend to keep it somewhat up to date. I think it will take some time
before we have sufficient experience with SUJ in head before we want to
put it back in 8. It is quite a complex and disruptive feature.
> Thank you.
> Patrick Tracanelli
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