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Date:   Sun, 3 Apr 2022 12:17:05 -0500
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Subject: Re: [REQUEST DISCUSS]: speed up SCSI error handle for host with
 massive devices
Content-Language: en-US
From:   Mike Christie <michael.christie@oracle.com>
To:     Wenchao Hao <haowenchao@huawei.com>,
        Hannes Reinecke <hare@suse.de>,
        Steffen Maier <maier@linux.ibm.com>,
        linux-scsi@vger.kernel.org,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "James E.J. Bottomley" <jejb@linux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Lee Duncan <lduncan@suse.com>,
        John Garry <john.garry@huawei.com>
Cc:     Wu Bo <wubo40@huawei.com>, Feilong Lin <linfeilong@huawei.com>,
        zhangjian013@huawei.com
References: <71e09bb4-ff0a-23fe-38b4-fe6425670efa@huawei.com>
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 <78d41ec1-b30c-f6d2-811c-e0e4adbc8f01@oracle.com>
In-Reply-To: <78d41ec1-b30c-f6d2-811c-e0e4adbc8f01@oracle.com>
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On 4/3/22 12:14 PM, Mike Christie wrote:
> We could share code with scsi_ioctl_reset as well. Drivers that support
> TMFs via that ioctl already expect queuecommand to be possibly in the
> middle of a run and IO not yet timed out. For example, the code to
> block a queue and reset the device could be used for the new EH and
> SG_SCSI_RESET_DEVICE handling.
> 

Hannes or others,

How do parallel SCSI drivers support scsi_ioctl_reset? Is is not fully
supported and more only used for controlled testing?