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To: Ivan Voras <ivoras@freebsd.org>
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Date: Fri, 25 Nov 2011 23:27:47 -0800
From: Kirk McKusick <mckusick@mckusick.com>
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Cc: freebsd-fs@freebsd.org
Subject: Re: Does UFS2 send BIO_FLUSH to GEOM when update metadata (with
	softupdates)? 
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Your proposed change is definitely useful, though really just applies
to filesystems running without SU and SU+J. The cases where bwrite
are used are when we are using synchronous write to maintain
filesystem consistency (e.g., the filesystem before SU).

	Kirk McKusick