Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices

[Kani, Toshimitsu]

On Tue, 2016-06-14 at 09:50 -0400, Jeff Moyer wrote:
> "Kani, Toshimitsu" <toshi.kani@xxxxxxx> writes:
> > > I had dm-linear and md-raid0 support on my list of things to look at,
> > > did you have raid0 in your plans?
> >
> > Yes, I hope to extend further and raid0 is a good candidate. 
>
> dm-flakey would allow more xfstests test cases to run.ÂÂI'd say that's
> more important than linear or raid0.ÂÂ;-)

That's an interesting one. ÂWe can emulate badblocks by failing
direct_access with -EIO, but I do not think we can emulate "drop_writes" and
"corrupt_bio_byte" features with DAX...

> Also, the next step in this work is to then decide how to determine on
> what numa node an LBA resides.ÂÂWe had discussed this at a prior
> plumbers conference, and I think the consensus was to use xattrs.
> Toshi, do you also plan to do that work?

No, it's not my plan at this point.

Thanks,
-Toshi