SU+J systems do not fsck themselves

[Kostik Belousov]

On Wed, Dec 28, 2011 at 11:14:19AM -0800, mdf at freebsd.org wrote:
> SU doesn't care about write ordering, as long as everything before a
> BIO_FLUSH is really flushed by the time the BIO_FLUSH is acknowledged.
No.

SU and SU+J only require that write completed notification is issued
when geom/driver layer guarantees that the block content is written
to the stable storage.

SU does not depend on non-reordering of writes in any way, as well as
it does not issue BIO_FLUSH.
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