Date: Wed, 28 Dec 2011 21:17:39 +0200 From: Kostik Belousov <kostikbel@gmail.com> To: mdf@freebsd.org Cc: Maxim Khitrov <max@mxcrypt.com>, Matthias Andree <matthias.andree@gmx.de>, freebsd-current@freebsd.org Subject: Re: SU+J systems do not fsck themselves Message-ID: <20111228191739.GC50300@deviant.kiev.zoral.com.ua> In-Reply-To: <CAMBSHm-%2BJGQiXHRh0ona3qZN2O2s=7dgnQ_3q_NoLe-CWM2yww@mail.gmail.com> References: <20111227215330.GI45484@redundancy.redundancy.org> <4EFB470D.3070309@gmx.de> <CAJcQMWeDeCC-pvz4tfwZKAUqxZnpPBOpa9r12o0_w4=YyGf4zA@mail.gmail.com> <CAMBSHm-%2BJGQiXHRh0ona3qZN2O2s=7dgnQ_3q_NoLe-CWM2yww@mail.gmail.com>
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--EURhva3SXbTcVq/V Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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. --EURhva3SXbTcVq/V Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) iEYEARECAAYFAk77a1MACgkQC3+MBN1Mb4hK+QCgjOV68X27ufdcR9iEQ3HTW3Sd HnAAn3PhjvVYKJpoGGulkvS/zYgzxz0H =RBAI -----END PGP SIGNATURE----- --EURhva3SXbTcVq/V--
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