From: James Bottomley <James.Bottomley@steeleye.com>
To: James Bottomley <James.Bottomley@SteelEye.com>,
"Justin T. Gibbs" <gibbs@scsiguy.com>,
linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: aic7xxx sets CDR offline, how to reset?
Date: Tue, 03 Sep 2002 14:09:44 -0500 [thread overview]
Message-ID: <200209031909.g83J9iG07312@localhost.localdomain> (raw)
In-Reply-To: Message from Doug Ledford <dledford@redhat.com> of "Tue, 03 Sep 2002 14:23:53 EDT." <20020903142353.A12157@redhat.com>
dledford@redhat.com said:
> Leave abort active. It does actually work in certain scenarios. The
> CD burner scenario that started this thread is an example of
> somewhere that an abort should actually do the job.
Unfortunately, it would destroy the REQ_BARRIER approach in the block layer.
At best, abort probably causes a command to overtake a barrier it shouldn't,
at worst we abort the ordered tag that is the barrier and transactional
integrity is lost.
When error correction is needed, we have to return all the commands for that
device to the block layer so that ordering and barrier issues can be taken
care of in the reissue. This makes LUN RESET (for those that support it) the
minimum level of error correction we can apply.
James
next prev parent reply other threads:[~2002-09-03 19:05 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-03 14:35 James Bottomley
2002-09-03 18:23 ` Doug Ledford
2002-09-03 19:09 ` James Bottomley [this message]
2002-09-03 20:59 ` Alan Cox
2002-09-03 21:32 ` James Bottomley
2002-09-03 21:54 ` Alan Cox
2002-09-03 22:50 ` Doug Ledford
2002-09-03 23:28 ` Alan Cox
2002-09-04 7:40 ` Jeremy Higdon
2002-09-04 16:24 ` James Bottomley
2002-09-04 17:13 ` Mike Anderson
2002-09-05 9:50 ` Jeremy Higdon
2002-09-04 16:13 ` James Bottomley
2002-09-04 16:50 ` Justin T. Gibbs
2002-09-05 9:39 ` Jeremy Higdon
2002-09-05 13:35 ` Justin T. Gibbs
2002-09-03 21:13 ` Doug Ledford
2002-09-03 21:48 ` James Bottomley
2002-09-03 22:42 ` Doug Ledford
2002-09-03 22:52 ` Doug Ledford
2002-09-03 23:29 ` Alan Cox
2002-09-04 21:16 ` Luben Tuikov
2002-09-04 10:37 ` Andries Brouwer
2002-09-04 10:48 ` Doug Ledford
2002-09-04 11:23 ` Alan Cox
2002-09-04 16:25 ` Rogier Wolff
2002-09-04 19:34 ` Thunder from the hill
2002-09-03 21:24 ` Patrick Mansfield
2002-09-03 22:02 ` James Bottomley
2002-09-03 23:26 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2002-09-02 12:23 CAMTP guest
2002-09-02 15:50 ` Justin T. Gibbs
2002-09-02 18:05 ` Doug Ledford
2002-09-02 19:16 ` CAMTP guest
2002-09-02 19:48 ` Justin T. Gibbs
2002-09-02 19:42 ` Justin T. Gibbs
2002-06-11 2:46 Proposed changes to generic blk tag for use in SCSI (1/3) James Bottomley
2002-06-11 5:50 ` Jens Axboe
2002-06-11 14:29 ` James Bottomley
2002-06-11 14:45 ` Jens Axboe
2002-06-11 16:39 ` James Bottomley
2002-06-13 21:01 ` Doug Ledford
2002-06-13 21:26 ` James Bottomley
2002-06-13 21:50 ` Doug Ledford
2002-06-13 22:09 ` James Bottomley
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