Re: [RESEND PATCH] scsi: ufs: sysfs: support writing boot_lun attr

[Damien Le Moal]

On 6/5/22 12:55, Bart Van Assche wrote:
> On 6/1/22 10:05, Avri Altman wrote:
>> As a design rule, sysfs attribute files should not be used to make
>> persistent modifications to a device configuration. This rule applies
>> to all subsystems and ufs is no different.
> 
> Hmm ... where does that rule come from? I can't find it in
> Documentation/admin-guide/sysfs-rules.rst. Did I perhaps overlook something?

I am not aware of any writable sysfs attribute file that can be used to
make persistent device configuration changes, at least in storage area.
I know of plenty that do change a device setting, but without saving this
setting to maintain it across power cycles. Do you know of any such
attribute ? I was under the impression that sysfs should not be used to
persistently reconfigure a device...

-- 
Damien Le Moal
Western Digital Research