Re: [PATCH v7 4/6] dax: add DAX_RECOVERY flag and .recovery_write dev_pgmap_ops

[Christoph Hellwig]

On Wed, Apr 06, 2022 at 05:32:31PM +0000, Jane Chu wrote:
> Yes, I believe Dan was motivated by avoiding the dm dance as a result of
> adding .recovery_write to dax_operations.
> 
> I understand your point about .recovery_write is device specific and
> thus not something appropriate for device agnostic ops.
> 
> I can see 2 options so far -
> 
> 1)  add .recovery_write to dax_operations and do the dm dance to hunt 
> down to the base device that actually provides the recovery action

That would be my preference.  But I'll wait for Dan to chime in.

> Okay, will run the checkpatch.pl test again.

Unfortuntely checkpatch.pl is broken in that regard.  It treats the
exception to occasionally go longer or readability as the default.