Re: [PATCH] NFSv4: Tune the race to set and use the client id uniquifier

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> On Feb 28, 2022, at 3:06 PM, Trond Myklebust <trondmy@xxxxxxxxxxxxxxx> wrote:
> 
> On Mon, 2022-02-28 at 19:04 +0000, Chuck Lever III wrote:
>> 
>> 
>>> On Feb 28, 2022, at 12:24 PM, Trond Myklebust
>>> <trondmy@xxxxxxxxxxxxxxx> wrote:
>>> 
>>>> Attempts to work toward solutions in this area seem to be
>>>> ignored,
>>>> the
>>>> questions still stand.  Until we can sort out and agree on a
>>>> direction,
>>>> self-NACK to this patch.
>>> 
>>> A new mount option doesn't solve any problems that we can't solve
>>> with
>>> the existing framework.
>> 
>> I don't think a mount option was proposed. Rather, the mechanics
>> of the udev rule would be done by mount.nfs without any changes
>> to the administrative interface.
>> 
> 
> That's not how I read this proposal:
> 
>> Do you still want us to keep this approach, or will you accept a
> mount
>> option as:
>> - first mount in a namespace sets the identifier
>> - subsequent mounts with conflicting identifiers return an error
> 
> 
> Which is why I responded as I did.

Ah! Well, I read "mount option" as "mount alternative", I guess
I was filling in some context from previous dialog on the topic.

I agree with you that an actual mount option -- that is, a new
administrative interface -- is not desirable or necessary.

But I assert that having mount.nfs take care of initializing the
uniquifier for the net namespace is convenient, and can be done
automatically and reliably.

--
Chuck Lever







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