Re: Known and unfixed active data loss bug in MM + XFS with large folios since Dec 2021 (any kernel from 6.1 upwards)

Christian Brauner
2024-09-18T09:51:16Z

On Mon, Sep 16, 2024 at 02:29:49PM GMT, Matthew Wilcox wrote:
> On Fri, Sep 13, 2024 at 02:11:22PM +0200, Christian Brauner wrote:
> > So this issue it new to me as well. One of the items this cycle is the
> > work to enable support for block sizes that are larger than page sizes
> > via the large block size (LBS) series that's been sitting in -next for a
> > long time. That work specifically targets xfs and builds on top of the
> > large folio support.
> >
> > If the support for large folios is going to be reverted in xfs then I
> > see no point to merge the LBS work now. So I'm holding off on sending
> > that pull request until a decision is made (for xfs). As far as I
> > understand, supporting larger block sizes will not be meaningful without
> > large folio support.
>
> This is unwarranted; please send this pull request. We're not going to
> rip out all of the infrastructure although we might end up disabling it
> by default. There's a bunch of other work queued up behind that, and not
> having it in Linus' tree is just going to make everything more painful.

Now that there's a reproducer and hopefully soon a fix I think we can
try and merge this next week.