Re: [GIT PULL] vfs: improve DAX behavior for 5.8, part 3

["Darrick J. Wong" <darrick.wong@oracle.com>]

On Thu, Jun 11, 2020 at 11:00:43AM -0700, Linus Torvalds wrote:
> On Wed, Jun 10, 2020 at 7:43 PM Darrick J. Wong <djwong@kernel.org> wrote:
> >
> > I did a test merge of this branch against upstream this evening and
> > there weren't any conflicts.  The first five patches in the series were
> > already in the xfs merge, so it's only the last one that should change
> > anything.  Please let us know if you have any complaints about pulling
> > this, since I can rework the branch.
> 
> I've taken this, but I hate how the patches apparently got duplicated.
> It feels like they should have been a cleanly separated branch that
> was just pulled into whoever needed them when they were ready, rather
> than applied in two different places.
> 
> So this is just a note for future work - duplicating the patches like
> this can cause annoyances down the line. No merge issues this time
> (they often happen when duplicate patches then have other work done on
> top of them), but things like "git bisect" now don't have quite as
> black-and-white a situation etc etc.,
> 
> ("git bisect" will still find _one_ of the duplicate commits if it
> introduced a problem, so it's usually not a huge deal, but it can
> cause the bug to be then repeated if people revert that one, but
> nobody ever notices that the other commit that did the same thing is
> still around and it gets back-ported to stable or whatever..)
> 
> So part of this is just in general about confusing duplicate history,
> and part of it is that the duplication can then cause later confusion.

Urgh, sorry.  I /was/ careful to make sure the patches matched, but I'll
be more careful the next time this (hopefully never) happens again. :/

--D


>                 Linus