Re: should we make "-o iversion" the default on ext4 ?

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On 20 Jul 2022, at 10:38, Jeff Layton wrote:
> On Wed, 2022-07-20 at 16:15 +0200, Lukas Czerner wrote:
>>
>> Is there a different way I am not seeing?
>>
>
> Right, implementing this is the difficult bit actually since this uses a
> MS_* flag. If we do make this the default, we'd definitely want to
> continue allowing "-o noiversion" to disable it.
>
> Could we just reverse the default in libmount? It might cause this to
> suddenly be enabled in some deployments, but in most cases, people
> wouldn't even notice and they could still specify -o noiversion to turn
> it off.
>
> Another idea would be to introduce new mount options for this, but
> that's kind of nasty from a UI standpoint.

Is it safe to set SB_I_VERSION at export time?  If so, export_operations
could grow an ->enable_iversion().

Ben




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