From: Hannes Reinecke <hare@suse.de>
To: John Garry <john.garry@huawei.com>,
JBottomley@odin.com, martin.petersen@oracle.com
Cc: linuxarm@huawei.com, john.garry2@mail.dcu.ie,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 5/6] hisi_sas: add hisi_sas_slave_configure()
Date: Sat, 27 Feb 2016 19:59:56 +0800 [thread overview]
Message-ID: <56D18FBC.8050501@suse.de> (raw)
In-Reply-To: <1456393335-38294-6-git-send-email-john.garry@huawei.com>
On 02/25/2016 05:42 PM, John Garry wrote:
> In high-datarate aging tests, it is found that the
> SCSI framework can periodically issue lu resets as
> some commands timeout.
> Response TASK SET FULL and SAS_QUEUE_FULL may be
> returned many times for the same command, causing the
> timeouts.
> The SAS_QUEUE_FULL errors come from
> TRANS_TX_CREDIT_TIMEOUT_ERR, TRANS_TX_CLOSE_NORMAL_ERR,
> and TRANS_TX_ERR_FRAME_TXED errors. They do not mean
> that the queue is full in the host, but rather it is
> equivalent to meaning the queue is full for the sdev.
> To overcome this, the queue depth for the sdev is
> reduced to 64 (from 256, set in sas_slave_configure()).
> Normally error code SAS_QUEUE_FULL will result in the
> sdev queue depth falling, but it falls too slowly during
> high-datarate tests and commands timeout before it
> has fallen to an adequete level from original value.
>
> Signed-off-by: John Garry <john.garry@huawei.com>
> ---
Reviewed-by: Hannes Reinecke <hare@suse.de>
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare@suse.de +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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WARNING: multiple messages have this Message-ID (diff)
From: Hannes Reinecke <hare@suse.de>
To: John Garry <john.garry@huawei.com>,
JBottomley@odin.com, martin.petersen@oracle.com
Cc: linuxarm@huawei.com, john.garry2@mail.dcu.ie,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 5/6] hisi_sas: add hisi_sas_slave_configure()
Date: Sat, 27 Feb 2016 19:59:56 +0800 [thread overview]
Message-ID: <56D18FBC.8050501@suse.de> (raw)
In-Reply-To: <1456393335-38294-6-git-send-email-john.garry@huawei.com>
On 02/25/2016 05:42 PM, John Garry wrote:
> In high-datarate aging tests, it is found that the
> SCSI framework can periodically issue lu resets as
> some commands timeout.
> Response TASK SET FULL and SAS_QUEUE_FULL may be
> returned many times for the same command, causing the
> timeouts.
> The SAS_QUEUE_FULL errors come from
> TRANS_TX_CREDIT_TIMEOUT_ERR, TRANS_TX_CLOSE_NORMAL_ERR,
> and TRANS_TX_ERR_FRAME_TXED errors. They do not mean
> that the queue is full in the host, but rather it is
> equivalent to meaning the queue is full for the sdev.
> To overcome this, the queue depth for the sdev is
> reduced to 64 (from 256, set in sas_slave_configure()).
> Normally error code SAS_QUEUE_FULL will result in the
> sdev queue depth falling, but it falls too slowly during
> high-datarate tests and commands timeout before it
> has fallen to an adequete level from original value.
>
> Signed-off-by: John Garry <john.garry@huawei.com>
> ---
Reviewed-by: Hannes Reinecke <hare@suse.de>
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare@suse.de +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
next prev parent reply other threads:[~2016-02-27 12:00 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-25 9:42 [PATCH v2 0/6] hisi_sas: add abort and retry feature John Garry
2016-02-25 9:42 ` John Garry
2016-02-25 9:42 ` [PATCH v2 1/6] hisi_sas: change tmf func complete check John Garry
2016-02-25 9:42 ` John Garry
2016-02-27 11:56 ` Hannes Reinecke
2016-02-25 9:42 ` [PATCH v2 2/6] hisi_sas: add hisi_sas_slot_abort() John Garry
2016-02-25 9:42 ` John Garry
2016-02-27 11:57 ` Hannes Reinecke
2016-02-25 9:42 ` [PATCH v2 3/6] hisi_sas: use slot abort in v1 hw John Garry
2016-02-25 9:42 ` John Garry
2016-02-27 11:58 ` Hannes Reinecke
2016-02-25 9:42 ` [PATCH v2 4/6] hisi_sas: use slot abort in v2 hw John Garry
2016-02-25 9:42 ` John Garry
2016-02-27 11:59 ` Hannes Reinecke
2016-02-25 9:42 ` [PATCH v2 5/6] hisi_sas: add hisi_sas_slave_configure() John Garry
2016-02-25 9:42 ` John Garry
2016-02-27 11:59 ` Hannes Reinecke [this message]
2016-02-27 11:59 ` Hannes Reinecke
2016-02-25 9:42 ` [PATCH v2 6/6] hisi_sas: update driver version to 1.3 John Garry
2016-02-25 9:42 ` John Garry
2016-02-27 12:00 ` Hannes Reinecke
2016-03-01 2:00 ` [PATCH v2 0/6] hisi_sas: add abort and retry feature Martin K. Petersen
2016-03-01 2:00 ` Martin K. Petersen
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