[PATCH v2 5/5] dax: handle media errors in dax_do_io

[Jeff Moyer]

Dan Williams <dan.j.williams at intel.com> writes:

>>> There's a lot of special casing here, so you might consider adding
>>> comments.
>>
>> Correct - maybe we should reconsider wrapper-izing this? :)
>
> Another option is just to skip dax_do_io() and this special casing
> fallback entirely if errors are present.  I.e. only attempt dax_do_io
> when: IS_DAX() && gendisk->bb && bb->count == 0.

So, if there's an error anywhere on the device, penalize all I/O (not
just writes, and not just on sectors that are bad)?  I'm not sure that's
a great plan, either.

-Jeff