From: Mike Anderson <andmike@linux.vnet.ibm.com>
To: Mike Christie <michaelc@cs.wisc.edu>
Cc: Grant Grundler <grundler@google.com>,
linux-scsi@vger.kernel.org, Jens Axboe <jens.axboe@oracle.com>,
Alasdair G Kergon <agk@redhat.com>, Neil Brown <neilb@suse.de>,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: Re: [PATCH 01/14] block: separate failfast into multiple bits.
Date: Tue, 2 Sep 2008 10:31:14 -0700 [thread overview]
Message-ID: <20080902173114.GA27138@linux.vnet.ibm.com> (raw)
In-Reply-To: <48BD70E6.5020702@cs.wisc.edu>
Mike Christie <michaelc@cs.wisc.edu> wrote:
> Grant Grundler wrote:
>> On Tue, Sep 2, 2008 at 9:05 AM, Mike Anderson
>> <andmike@linux.vnet.ibm.com> wrote:
>>> From: Mike Christie <michaelc@cs.wisc.edu>
>>>
>>> Multipath is best at handling transport errors. If it gets a device
>>> error then there is not much the multipath layer can do. It will just
>>> access the same device but from a different path.
>>>
>>> This patch breaks up failfast into device, transport and driver errors.
>>
>> Is there any document that describes what those errors are for each
>> class of transport?
>
>
>
> Not yet. For SCSI I was still trying to classify the host byte errors,
> because drivers are using them differently. I had sent patches in the
> thread here
> http://marc.info/?l=linux-scsi&m=121918956332584&w=2
> that just start syncing up the transport errors for SCSI by adding some
> new transport host byte errors and converting drivers and transport
> classes to them.
>
I can work on a patch to the scsi_mid_low_api.txt document that describes
the mapping / policy of these changes (i.e., DID_* / sense to
SCSI_MLQUEUE_DIS_* mapping to blk_failfast_* mapping ).
-andmike
--
Michael Anderson
andmike@linux.vnet.ibm.com
next prev parent reply other threads:[~2008-09-02 22:07 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-02 16:05 [PATCH 0/14] scsi: scsi_decide_dispostion update Mike Anderson
2008-09-02 16:05 ` [PATCH 01/14] block: separate failfast into multiple bits Mike Anderson
2008-09-02 16:35 ` Grant Grundler
2008-09-02 16:59 ` Mike Christie
2008-09-02 17:31 ` Mike Anderson [this message]
2008-09-03 8:27 ` Boaz Harrosh
2008-09-02 16:05 ` [PATCH 02/14] scsi: add transport host byte errors (v3) Mike Anderson
2008-09-02 16:05 ` [PATCH 03/14] scsi: Move wait_for check Mike Anderson
2008-09-02 16:05 ` [PATCH 04/14] scsi: Move retries check Mike Anderson
2008-09-04 18:27 ` James Bottomley
2008-09-04 19:52 ` Mike Anderson
2008-09-04 21:21 ` James Bottomley
2008-09-02 16:05 ` [PATCH 05/14] scsi: Move blk_noretry_request Mike Anderson
2008-09-02 16:05 ` [PATCH 06/14] scsi: remove maybe_retry Mike Anderson
2008-09-02 16:05 ` [PATCH 07/14] scsi: change return codes in scsi_decide_disposition Mike Anderson
2008-09-02 16:05 ` [PATCH 08/14] scsi: rename scsi_queue_insert to scsi_attempt_requeue_command Mike Anderson
2008-09-02 16:05 ` [PATCH 09/14] scsi: have device handlers return SCSI_MLQUEUE error value Mike Anderson
2008-09-02 16:05 ` [PATCH 10/14] scsi: convert other scsi_check_sense users to new error codes Mike Anderson
2008-09-02 16:05 ` [PATCH 11/14] scsi: fix up SCSI_MLQUEUE defintions and add driver, device and transport ones Mike Anderson
2008-09-02 16:05 ` [PATCH 12/14] scsi: move device online check to scsi_attempt_requeue_command Mike Anderson
2008-09-02 16:05 ` [PATCH 13/14] scsi: remove scsi_device_online from scsi_decide_disposition Mike Anderson
2008-09-02 16:05 ` [PATCH 14/14] scsi: update scsi_log_completion disposition decoding Mike Anderson
2008-09-02 17:03 ` [PATCH 0/14] scsi: scsi_decide_dispostion update Mike Christie
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