linux-kernel - Re: [PATCH] scsi: sd: support specify probe type of build-in driver

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Date:   Thu, 8 Jun 2023 09:23:16 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Jianlin Lv <iecedge@...il.com>
Cc:     jejb@...ux.ibm.com, martin.petersen@...cle.com, paulmck@...nel.org,
        bp@...e.de, peterz@...radead.org, will@...nel.org,
        rdunlap@...radead.org, kim.phillips@....com, rostedt@...dmis.org,
        wyes.karny@....com, jianlv@...y.com, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [PATCH] scsi: sd: support specify probe type of build-in driver

On 6/7/23 19:51, Jianlin Lv wrote:
> On Thu, Jun 8, 2023 at 1:07 AM Bart Van Assche <bvanassche@....org> wrote:
>> On 6/7/23 08:55, Jianlin Lv wrote:
>> I see two possible solutions:
>> - Change the volume provisioner such that it uses disk references that do
>>     not depend on the probing order, e.g. /dev/disk/by-id/...
> 
> Yes, The "/dev/disk/by-id/" can uniquely identify SCSI devices. However,
> I don't think it is suitable for the volume provisioner workflow.
> For nodes of the same SKU , a unified YAML file will be defined to instruct
> the volume provisioner on how to manage the local disks.
> If use WWID, it would mean that a unique YAML file needs to be defined
> for each node. This approach becomes impractical when dealing with a large
> number of work nodes.
Please consider using the paths available in /dev/disk/by-path.

Thanks,

Bart.