Re: Discussion: what would not blocking on btrfs look like?

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On Mon, 2019-08-26 at 23:54 -0400, Neal Gompa wrote:
> On Mon, Aug 26, 2019 at 7:16 AM <jkonecny@xxxxxxxxxx> wrote:
> > On Sat, 2019-08-24 at 07:31 -0700, Adam Williamson wrote:
> > > On Fri, 2019-08-23 at 19:00 -0600, Chris Murphy wrote:
> > > > On Fri, Aug 23, 2019 at 1:17 PM Adam Williamson
> > > > <adamwill@xxxxxxxxxxxxxxxxx> wrote:
> > > > 
> > > > > So, there was recently a Thing where btrfs installs were
> > > > > broken,
> > > > > and
> > > > > this got accepted as a release blocker:
> > > > > 
> > > > > https://bugzilla.redhat.com/show_bug.cgi?id=1733388
> > > > 
> > > > Summary: This bug was introduced and discovered in linux-next,
> > > > it
> > > > started to affect Fedora 5.3.0-rc0 kernels in openqa tests,
> > > > patch
> > > > appeared during rc1, and the patch was merged into 5.3.0-rc2.
> > > > The
> > > > bug
> > > > resulted in a somewhat transient deadlock which caused installs
> > > > to
> > > > hang, but no corruption. The fix, 2 files changed, 12
> > > > insertions, 8
> > > > deletions (1/2 the insertions are comments).
> > > > 
> > > > How remarkable or interesting is this bug? And in particular,
> > > > exactly
> > > > how much faster should it have been fixed in order to avoid
> > > > worrying
> > > > about it being a blocker bug?
> > > > 
> > > > 7/25 14:27 utc bug patch was submitted to linux-btrfs@
> > > > 7/25 22:33 utc bug was first reported in Fedora bugzilla
> > > > 7/26 19:20 utc I confirmed upstream's patch related to this bug
> > > > with
> > > > upstream and updated the Fedora bug
> > > > 7/26 22:50 utc I confirmed it was merged into rc2, and updated
> > > > the
> > > > Fedora bug
> > > > 
> > > > So in the context of status quo, where Btrfs is presented as an
> > > > option
> > > > in the installer and if there are bugs they Beta blocking, how
> > > > could
> > > > or should this have been fixed sooner? What about the handling
> > > > should
> > > > have been different?
> > > 
> > > Nothing. The kernel team's concern is not related to this bug or
> > > the
> > > handling of this bug in any way. The only relevance of the bug is
> > > that
> > > it alerted the kernel team to the fact that we currently block on
> > > btrfs, which they think we should not.
> > 
> > I understand them. The point is, for them and even us (the
> > installer)
> > is work on BTRFS not a priority. It's something we can't benefit on
> > RHEL and it could be almost completely replaced by LVM + xfs
> > solution.
> > However, it still giving us bugs and making our test surface
> > bigger.
> > 
> > > From the Anaconda team PoV it would make our lives easier to not
> > support BTRFS at all. I'm not saying that we should drop BTRFS in
> > Fedora, only that it would be easier for Anaconda team to be
> > without
> > that on Fedora.
> 
> This is flat-out a trap. This is what makes Anaconda such a failure
> as
> a community project. Why does the past (RHEL) affect the present and
> future (Fedora)? There's basically no way whatsoever to make anything
> better with this logic. The Anaconda releases that any improvements
> would be going into aren't even landing into the RHEL 8 branch that
> governs the latest iteration of Fedora's past. From any reasonable
> person's perspective, this answer makes no sense unless you're using
> RHEL as an excuse to not support Fedora.
> 

RHEL is not the past. Everything we do we have to think that it will go
to RHEL and if it is Fedora specific we have to create a way to disable
the functionality for another RHEL branching. And yes, we have a few
things (not only a BTRFS) specific to Fedora the same way as a few
things specific to RHEL which are disabled on Fedora.

And as I wrote before, I'm not saying that we will remove the BTRFS
support from Fedora. The point is that making the list specific to
releases smaller will make our live easier.

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