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Date: Wed, 28 Dec 2011 21:17:39 +0200
From: Kostik Belousov <kostikbel@gmail.com>
To: mdf@freebsd.org
Message-ID: <20111228191739.GC50300@deviant.kiev.zoral.com.ua>
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Cc: Maxim Khitrov <max@mxcrypt.com>, Matthias Andree <matthias.andree@gmx.de>,
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Subject: Re: SU+J systems do not fsck themselves
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On Wed, Dec 28, 2011 at 11:14:19AM -0800, mdf@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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