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Groups > linux.debian.devel > #101170

Re: testing for rootfs vs. /usr reproducibility regressions

From Simon McVittie <smcv@debian.org>
Newsgroups linux.debian.devel
Subject Re: testing for rootfs vs. /usr reproducibility regressions
Date 2021-08-19 12:50 +0200
Message-ID <CNNMt-8jb-1@gated-at.bofh.it> (permalink)
References (5 earlier) <CN4cF-3pJ-1@gated-at.bofh.it> <CN4w1-3yt-5@gated-at.bofh.it> <CN7WV-68W-9@gated-at.bofh.it> <CN9YJ-7pl-3@gated-at.bofh.it> <CNLrk-6YG-27@gated-at.bofh.it>
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On Thu, 19 Aug 2021 at 10:06:27 +0200, Helmut Grohne wrote:
> On Tue, Aug 17, 2021 at 05:19:06PM +0100, Simon McVittie wrote:
> > If we want to make buildd chroots merged-/usr any time soon, then I
> > think we need to say this class of bugs is RC for bookworm.
> 
> For a moment, let us assume perfection of this plan: Reproducible builds
> identify all of the cases that need to be fixed. We bump them to RC
> bugs. We fix them all. Then we change unstable to be merged-/usr and
> we're done. Are we? We still need to support partial upgrades from
> bullseye to bookworm, so - as you pointed out earlier - all packages in
> bookworm will have to keep this support property. However, our
> defaulting to merged-/usr makes it impossible for reproducible builds to
> test it as producing an unmerged chroot is no longer possible.
> Effectively, the unmerged case will be untested and as a consequence
> will be broken.

Is this the scenario you're concerned about?

* We reach a point where every package in bookworm builds identically
  (or with only non-/usr-related variation) in non-merged-/usr and
  merged-/usr chroots, i.e. the bugs falling into classification
  https://tests.reproducible-builds.org/debian/issues/unstable/paths_vary_due_to_usrmerge_issue.html
  have all been fixed

* We deploy an automatic transition mechanism that makes all bookworm
  installations, including chroots, convert to merged-/usr (for example,
  making usrmerge transitively Essential would be one possible
  implementation, although perhaps not the best one)

* Now our buildd chroots are all merged-/usr, and additionally we can
  no longer easily test for /usr-related reproducibility

* The foo maintainer uploads foo_1.0 that has a regression, introducing a
  *new* /usr-related unreproducibility (for example it might end up
  hard-coding /usr/bin/sh when built in a merged-/usr environment, rather
  than the /bin/sh that is correct for traditional environments, even
  though earlier versions of foo did not have that bug)

* The regression is not detected because we can't easily test for it any more

* A user carries out a partial upgrade in which foo_1.0 is upgraded before
  whatever part of the system is responsible for carrying out the transition
  mechanism

* Now foo doesn't work on that user's system

I agree that's a potential failure mode, although the window for regression
is not necessarily very long (foo would have to regress after the automatic
transition is already in place).

> For this plan to work, we will have to support unmerged chroots until
> the end of bookworm, which appears to contradict the premise we started
> with.

One way we could escape from this would be to observe that the earliest
point at which it is OK for package maintainers to rely on merged-/usr is
when the bookworm+1 development cycle opens, therefore it is OK to have
a mechanism for bookworm chroots/containers to be special-cased to opt out
from the merged-/usr transition, as long as those chroots/containers will
never be upgraded to bookworm+1 (because in practice we tend to discard
and re-bootstrap chroots/containers rather than upgrading them).
Conceptually, those chroots/containers are stuck in the "upgrade from
bullseye to bookworm almost but not quite complete" state, forever.

If desired, we could declare this to be formally unsupported, but
make reproducible-builds do it anyway, purely as a way to get test
coverage. This would be conceptually similar to the way people regularly
do archive rebuilds with a gcc that is not supported as the default yet,
in order to get the information we need before we can make it the default
- but in reverse, with the "old" configuration being the one that is
formally unsupported.

reproducible-builds could do something like this:

* for build1: do a merged-/usr chroot/container as (will become) usual
* for build2: bootstrap a chroot/container with --no-merged-usr, and set
  whatever flag opts-out from the transition

or (matching what they do for buster/bullseye):

* bootstrap a chroot/container with --no-merged-usr
* for build1: use it as-is (opting out from the transition if necessary)
* for build2: enable the transition and let it happen, or install usrmerge
  manually

Or, if the transition ends up being done during boot, either in the
initramfs or in normal user-space, then chroots/containers would
"naturally" not transition without manual action - similar to the way
chroots/containers don't pick up kernel or initramfs behaviour changes
like the changed default for /proc/sys/kernel/unprivileged_userns_clone
in bullseye, because their kernel is not their own.

    smcv

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Thread

merged /usr considered harmful (was Re: Bits from the Technical  Committee) Thorsten Glaser <tg@debian.org> - 2021-07-14 22:10 +0200
  Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Guillem Jover <guillem@debian.org> - 2021-07-14 23:50 +0200
    Re: merged /usr considered harmful Thorsten Glaser <tg@debian.org> - 2021-07-15 05:20 +0200
      Re: merged /usr considered harmful Thomas Goirand <zigo@debian.org> - 2021-07-16 10:00 +0200
      Re: merged /usr considered harmful Pierre-Elliott Bécue <peb@debian.org> - 2021-07-16 13:10 +0200
    Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Sean Whitton <spwhitton@spwhitton.name> - 2021-07-15 09:10 +0200
      Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Jonathan Carter <jcc@debian.org> - 2021-07-15 10:00 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical Committee) Marc Haber <mh+debian-devel@zugschlus.de> - 2021-07-15 10:50 +0200
          Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Jonathan Carter <jcc@debian.org> - 2021-07-15 11:40 +0200
          Re: merged /usr considered harmful Thorsten Glaser <tg@debian.org> - 2021-07-16 04:00 +0200
            Re: merged /usr considered harmful Marc Haber <mh+debian-devel@zugschlus.de> - 2021-07-16 09:20 +0200
              Re: merged /usr considered harmful The Wanderer <wanderer@fastmail.fm> - 2021-07-16 10:40 +0200
            endless discussion considered harmful Philip Hands <phil@hands.com> - 2021-07-16 12:40 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Sean Whitton <spwhitton@spwhitton.name> - 2021-07-15 20:10 +0200
    Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Luca Boccassi <bluca@debian.org> - 2021-07-15 11:20 +0200
      Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Magissia <debianlist@magissia.com> - 2021-07-16 13:50 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Helmut Grohne <helmut@subdivi.de> - 2021-07-18 23:00 +0200
      Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Guillem Jover <guillem@debian.org> - 2021-07-19 03:40 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical Committee) Marc Haber <mh+debian-devel@zugschlus.de> - 2021-07-19 07:20 +0200
          Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Gunnar Wolf <gwolf@debian.org> - 2021-07-19 08:40 +0200
          Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Gunnar Wolf <gwolf@debian.org> - 2021-07-19 09:00 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical Committee) Stephan Lachnit <stephanlachnit@debian.org> - 2021-07-19 11:40 +0200
          Re: merged /usr Simon McVittie <smcv@debian.org> - 2021-07-19 13:00 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Michael Biebl <biebl@debian.org> - 2021-07-19 15:30 +0200
          Re: merged /usr considered harmful (was Re: Bits from the Technical Committee) Johannes Schauer Marin Rodrigues <josch@debian.org> - 2021-07-19 16:50 +0200
            Re: merged /usr Simon McVittie <smcv@debian.org> - 2021-07-19 19:50 +0200
            Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Niels Thykier <niels@thykier.net> - 2021-07-20 08:20 +0200
            Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Guillem Jover <guillem@debian.org> - 2021-07-20 11:40 +0200
              Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Guillem Jover <guillem@debian.org> - 2021-07-20 12:30 +0200
              Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Andreas Metzler <ametzler@bebt.de> - 2021-07-20 14:00 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Svante Signell <svante.signell@gmail.com> - 2021-07-20 14:50 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-20 21:40 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Svante Signell <svante.signell@gmail.com> - 2021-07-20 23:20 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Holger Levsen <holger@layer-acht.org> - 2021-07-21 00:00 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Svante Signell <svante.signell@gmail.com> - 2021-07-21 00:10 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Holger Levsen <holger@layer-acht.org> - 2021-07-21 00:30 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-21 03:20 +0200
                Re: not actually anything to do with merged-/usr any more Simon McVittie <smcv@debian.org> - 2021-07-21 10:30 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-21 03:20 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-21 03:20 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Brian Thompson <brian@hashvault.io> - 2021-07-21 04:10 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-21 04:40 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical Committee) Marc Haber <mh+debian-devel@zugschlus.de> - 2021-07-21 08:20 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical Committee) Marc Haber <mh+debian-devel@zugschlus.de> - 2021-07-20 21:40 +0200
                a little productivity on the side (was Re: merged /usr considered  harmful) Thorsten Glaser <tg@debian.org> - 2021-07-22 04:00 +0200
          Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Guillem Jover <guillem@debian.org> - 2021-07-20 11:20 +0200
          Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Wouter Verhelst <wouter@debian.org> - 2021-07-22 16:00 +0200
            Re: merged /usr Simon McVittie <smcv@debian.org> - 2021-07-22 16:30 +0200
              Re: merged /usr Wouter Verhelst <wouter@debian.org> - 2021-07-27 12:50 +0200
                Re: merged /usr Andreas Metzler <ametzler@bebt.de> - 2021-07-27 14:20 +0200
                Re: merged /usr Wouter Verhelst <wouter@debian.org> - 2021-07-27 15:30 +0200
                Re: merged /usr Andrey Rahmatullin <wrar@debian.org> - 2021-07-27 16:00 +0200
                Re: merged /usr Wouter Verhelst <wouter@debian.org> - 2021-07-27 17:10 +0200
                Re: merged /usr Sam Hartman <hartmans@debian.org> - 2021-07-27 17:30 +0200
                Re: merged /usr Steve Cotton <steve@octalot.at> - 2021-07-28 02:40 +0200
                Re: merged /usr Andreas Metzler <ametzler@bebt.de> - 2021-07-27 17:40 +0200
                Re: merged /usr Guillem Jover <guillem@debian.org> - 2021-07-27 14:30 +0200
                Re: merged /usr Simon Richter <sjr@debian.org> - 2021-07-27 16:40 +0200
                Re: merged /usr Guillem Jover <guillem@debian.org> - 2021-07-27 17:10 +0200
                Re: merged /usr Calum McConnell <calumlikesapplepie@gmail.com> - 2021-07-27 19:30 +0200
                Re: merged /usr Simon Richter <sjr@debian.org> - 2021-07-28 16:40 +0200
                Re: merged /usr Guillem Jover <guillem@debian.org> - 2021-08-13 02:00 +0200
                Re: merged /usr Marco d'Itri <md@Linux.IT> - 2021-08-13 08:00 +0200
                Re: merged /usr Guillem Jover <guillem@debian.org> - 2021-08-13 11:00 +0200
                Re: merged /usr Marco d'Itri <md@Linux.IT> - 2021-08-13 17:30 +0200
                Re: merged /usr Luca Boccassi <bluca@debian.org> - 2021-08-13 11:20 +0200
                Re: merged /usr David Kalnischkies <david@kalnischkies.de> - 2021-08-14 14:40 +0200
                Re: merged /usr Luca Boccassi <bluca@debian.org> - 2021-08-14 15:10 +0200
                Re: merged /usr David Kalnischkies <david@kalnischkies.de> - 2021-08-14 16:00 +0200
                Re: merged /usr Simon McVittie <smcv@debian.org> - 2021-08-14 15:30 +0200
                Re: merged /usr David Kalnischkies <david@kalnischkies.de> - 2021-08-14 17:00 +0200
                Re: merged /usr Simon McVittie <smcv@debian.org> - 2021-08-15 01:20 +0200
                Re: merged /usr David Kalnischkies <david@kalnischkies.de> - 2021-08-15 12:00 +0200
                Re: merged /usr Simon McVittie <smcv@debian.org> - 2021-08-15 19:00 +0200
                Re: merged /usr Marco d'Itri <md@Linux.IT> - 2021-08-16 01:10 +0200
                Re: merged /usr David Kalnischkies <david@kalnischkies.de> - 2021-08-16 11:50 +0200
                Re: merged /usr Luca Boccassi <bluca@debian.org> - 2021-08-16 14:40 +0200
                Re: merged /usr Marco d'Itri <md@Linux.IT> - 2021-08-16 15:20 +0200
                Re: merged /usr David Kalnischkies <david@kalnischkies.de> - 2021-08-17 12:10 +0200
                Re: merged /usr Luca Boccassi <bluca@debian.org> - 2021-08-17 12:30 +0200
                A summary of where I think we are on the technical side of the  merged /usr discussion Sam Hartman <hartmans@debian.org> - 2021-08-17 16:10 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion Simon McVittie <smcv@debian.org> - 2021-08-17 18:20 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion "Theodore Ts'o" <tytso@mit.edu> - 2021-08-17 19:00 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion Simon McVittie <smcv@debian.org> - 2021-08-17 20:10 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion Simon Richter <sjr@debian.org> - 2021-08-17 21:20 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion Luca Boccassi <bluca@debian.org> - 2021-08-18 00:30 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion Simon Richter <sjr@debian.org> - 2021-08-18 10:50 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion Luca Boccassi <bluca@debian.org> - 2021-08-18 11:50 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion "Theodore Ts'o" <tytso@mit.edu> - 2021-08-18 05:30 +0200
                Re: merged /usr Simon McVittie <smcv@debian.org> - 2021-08-18 11:20 +0200
                Re: merged /usr Marco d'Itri <md@Linux.IT> - 2021-08-18 18:40 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion Helmut Grohne <helmut@subdivi.de> - 2021-08-19 10:20 +0200
                Re: merged /usr vs. symlink farms Simon McVittie <smcv@debian.org> - 2021-08-19 12:20 +0200
                Re: merged /usr vs. symlink farms "Theodore Ts'o" <tytso@mit.edu> - 2021-08-19 16:50 +0200
                Re: merged /usr vs. symlink farms Simon Richter <sjr@debian.org> - 2021-08-19 22:50 +0200
                Re: merged /usr vs. symlink farms "Theodore Ts'o" <tytso@mit.edu> - 2021-08-20 02:00 +0200
                Re: merged /usr vs. symlink farms Craig Small <csmall@debian.org> - 2021-08-20 02:40 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-20 12:30 +0200
                Re: merged /usr vs. symlink farms Philip Hands <phil@hands.com> - 2021-08-20 15:10 +0200
                Re: merged /usr vs. symlink farms Wouter Verhelst <wouter@debian.org> - 2021-08-21 10:30 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-21 15:50 +0200
                Re: merged /usr vs. symlink farms Wouter Verhelst <wouter@debian.org> - 2021-08-21 16:30 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-21 19:50 +0200
                Re: merged /usr vs. symlink farms Colin Watson <cjwatson@debian.org> - 2021-08-21 21:50 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-22 12:00 +0200
                Re: merged /usr vs. symlink farms Guillem Jover <guillem@debian.org> - 2021-08-21 23:00 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-22 12:30 +0200
                Re: merged /usr vs. symlink farms Steve Cotton <steve@octalot.at> - 2021-08-22 13:10 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-22 23:30 +0200
                Re: merged /usr vs. symlink farms Guillem Jover <guillem@debian.org> - 2021-11-12 05:00 +0100
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-11-12 12:00 +0100
                Re: merged /usr vs. symlink farms Simon Richter <sjr@debian.org> - 2021-08-22 02:20 +0200
                Re: merged /usr vs. symlink farms "Theodore Ts'o" <tytso@mit.edu> - 2021-08-22 05:20 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-22 12:30 +0200
                Re: merged /usr vs. symlink farms Russ Allbery <rra@debian.org> - 2021-08-22 16:50 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-22 23:30 +0200
                Re: merged /usr vs. symlink farms Russ Allbery <rra@debian.org> - 2021-08-23 04:20 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-23 15:50 +0200
                Re: merged /usr vs. symlink farms Russ Allbery <rra@debian.org> - 2021-08-23 17:30 +0200
                Re: merged /usr vs. symlink farms Simon Richter <sjr@debian.org> - 2021-08-23 22:10 +0200
                Re: merged /usr vs. symlink farms Russ Allbery <rra@debian.org> - 2021-08-23 22:50 +0200
                Re: merged /usr vs. symlink farms Ansgar <ansgar@43-1.org> - 2021-08-23 23:20 +0200
                Re: merged /usr vs. symlink farms Russ Allbery <rra@debian.org> - 2021-08-23 23:30 +0200
                Debhelper and /lib/systemd vs /usr/lib/systemd Sam Hartman <hartmans@debian.org> - 2021-08-24 01:30 +0200
                Re: Debhelper and /lib/systemd vs /usr/lib/systemd Russ Allbery <rra@debian.org> - 2021-08-24 02:00 +0200
                Re: Debhelper and /lib/systemd vs /usr/lib/systemd Niels Thykier <niels@thykier.net> - 2021-08-25 20:40 +0200
                Re: Debhelper and /lib/systemd vs /usr/lib/systemd Sam Hartman <hartmans@debian.org> - 2021-08-25 22:10 +0200
                Re: Debhelper and /lib/systemd vs /usr/lib/systemd Simon Richter <sjr@debian.org> - 2021-08-25 23:10 +0200
                Re: Debhelper and /lib/systemd vs /usr/lib/systemd Niels Thykier <niels@thykier.net> - 2021-08-25 23:30 +0200
                Re: Debhelper and /lib/systemd vs /usr/lib/systemd Andreas Metzler <ametzler@bebt.de> - 2021-08-26 19:40 +0200
                Re: Debhelper and /lib/systemd vs /usr/lib/systemd Niels Thykier <niels@thykier.net> - 2021-08-25 23:20 +0200
                Re: Debhelper and /lib/systemd vs /usr/lib/systemd Sam Hartman <hartmans@debian.org> - 2021-08-26 18:00 +0200
                Re: Debhelper and /lib/systemd vs /usr/lib/systemd Niels Thykier <niels@thykier.net> - 2021-08-26 19:50 +0200
                Re: merged /usr vs. symlink farms Wouter Verhelst <wouter@debian.org> - 2021-08-25 18:10 +0200
                Re: merged /usr vs. symlink farms Russ Allbery <rra@debian.org> - 2021-08-25 19:00 +0200
                Re: merged /usr vs. symlink farms Guillem Jover <guillem@debian.org> - 2021-08-25 20:10 +0200
                Re: merged /usr vs. symlink farms Russ Allbery <rra@debian.org> - 2021-08-25 22:30 +0200
                Re: merged /usr vs. symlink farms Wouter Verhelst <wouter@debian.org> - 2021-08-25 21:50 +0200
                Re: merged /usr vs. symlink farms Simon Richter <sjr@debian.org> - 2021-08-25 22:00 +0200
                Re: merged /usr vs. symlink farms Russ Allbery <rra@debian.org> - 2021-08-25 22:10 +0200
                Re: merged /usr vs. symlink farms Simon Richter <sjr@debian.org> - 2021-08-22 17:10 +0200
                Re: merged /usr vs. symlink farms Simon Richter <sjr@debian.org> - 2021-08-22 21:10 +0200
                Making the dpkg database correspond with reality (Was Re: merged  /usr vs. symlink farms) "Theodore Ts'o" <tytso@mit.edu> - 2021-08-24 02:50 +0200
                Re: Making the dpkg database correspond with reality (Was Re: merged  /usr vs. symlink farms) Timo Röhling <roehling@debian.org> - 2021-08-24 08:50 +0200
                Re: Making the dpkg database correspond with reality (Was Re: merged  /usr vs. symlink farms) Simon Richter <sjr@debian.org> - 2021-08-24 12:00 +0200
                Re: Making the dpkg database correspond with reality (Was Re: merged  /usr vs. symlink farms) "Theodore Ts'o" <tytso@mit.edu> - 2021-08-24 16:50 +0200
                Re: Making the dpkg database correspond with reality (Was Re: merged  /usr vs. symlink farms) Simon McVittie <smcv@debian.org> - 2021-08-24 20:00 +0200
                Re: merged /usr vs. symlink farms Sam Hartman <hartmans@debian.org> - 2021-08-23 16:20 +0200
                Re: merged /usr vs. symlink farms Timo Röhling <roehling@debian.org> - 2021-08-22 12:20 +0200
                Re: merged /usr vs. symlink farms "Theodore Ts'o" <tytso@mit.edu> - 2021-08-21 18:50 +0200
                Re: merged /usr vs. symlink farms David Kalnischkies <david@kalnischkies.de> - 2021-08-22 12:30 +0200
                Re: merged /usr vs. symlink farms "Theodore Ts'o" <tytso@mit.edu> - 2021-08-23 01:10 +0200
                Re: merged /usr vs. symlink farms gregor herrmann <gregoa@debian.org> - 2021-08-23 02:50 +0200
                Re: merged /usr vs. symlink farms Sam Hartman <hartmans@debian.org> - 2021-08-20 16:00 +0200
                Re: merged /usr vs. symlink farms "Theodore Ts'o" <tytso@mit.edu> - 2021-08-20 20:00 +0200
                Re: merged /usr vs. symlink farms Simon Richter <sjr@debian.org> - 2021-08-20 23:20 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-21 15:40 +0200
                Re: merged /usr vs. symlink farms Sam Hartman <hartmans@suchdamage.org> - 2021-08-23 16:40 +0200
                Re: merged /usr vs. symlink farms Aurelien Jarno <aurelien@aurel32.net> - 2021-08-25 21:40 +0200
                Re: merged /usr vs. symlink farms Danilo Santos <santosdanilo2013@gmail.com> - 2021-08-26 08:20 +0200
                Re: merged /usr vs. symlink farms Guillem Jover <guillem@debian.org> - 2021-08-22 00:20 +0200
                Re: merged /usr vs. symlink farms Andreas Metzler <ametzler@bebt.de> - 2021-08-22 09:20 +0200
                Re: merged /usr vs. symlink farms Guillem Jover <guillem@debian.org> - 2021-08-26 03:00 +0200
                Re: merged /usr vs. symlink farms Marco d'Itri <md@Linux.IT> - 2021-08-26 09:10 +0200
                Re: merged /usr vs. symlink farms Simon Richter <sjr@debian.org> - 2021-08-26 12:20 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-26 13:20 +0200
                Re: merged /usr vs. symlink farms Philip Hands <phil@hands.com> - 2021-08-26 14:00 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-26 14:20 +0200
                Re: merged /usr vs. symlink farms Simon Richter <sjr@debian.org> - 2021-08-26 15:00 +0200
                Re: merged /usr vs. symlink farms Timo Röhling <roehling@debian.org> - 2021-08-26 15:40 +0200
                Re: merged /usr vs. symlink farms Sam Hartman <hartmans@debian.org> - 2021-08-26 17:00 +0200
                Re: merged /usr vs. symlink farms Timo Röhling <roehling@debian.org> - 2021-08-26 17:40 +0200
                Re: merged /usr vs. symlink farms Andreas Metzler <ametzler@bebt.de> - 2021-08-26 19:30 +0200
                Re: merged /usr vs. symlink farms Luca Boccassi <bluca@debian.org> - 2021-08-26 16:00 +0200
                next steps after usrunmess Phil Morrell <debian@emorrp1.name> - 2021-08-27 04:50 +0200
                Re: next steps after usrunmess "Theodore Ts'o" <tytso@mit.edu> - 2021-08-27 17:30 +0200
                Re: next steps after usrunmess Bastien ROUCARIES <roucaries.bastien@gmail.com> - 2021-08-27 20:00 +0200
                Re: next steps after usrmerge "Theodore Ts'o" <tytso@mit.edu> - 2021-08-27 20:10 +0200
                Re: next steps after usrunmess Phil Morrell <debian@emorrp1.name> - 2021-08-27 20:40 +0200
                Re: next steps after usrunmess Bastien ROUCARIES <roucaries.bastien@gmail.com> - 2021-08-27 21:40 +0200
                Re: next steps after usrunmess Richard Laager <rlaager@debian.org> - 2021-08-27 21:20 +0200
                Re: merged-/usr vs. partially-symlink-farmed-root Ansgar <ansgar@43-1.org> - 2021-08-22 11:10 +0200
                Re: merged-/usr vs. partially-symlink-farmed-root Luca Boccassi <bluca@debian.org> - 2021-08-22 12:30 +0200
                Re: merged-/usr vs. partially-symlink-farmed-root Marvin Renich <mrvn@renich.org> - 2021-08-22 18:40 +0200
                Re: merged-/usr vs. partially-symlink-farmed-root Simon Richter <sjr@debian.org> - 2021-08-22 19:00 +0200
                Re: merged-/usr vs. partially-symlink-farmed-root Luca Boccassi <bluca@debian.org> - 2021-08-22 23:30 +0200
                Re: merged-/usr vs. partially-symlink-farmed-root "Theodore Ts'o" <tytso@mit.edu> - 2021-08-23 00:20 +0200
                Re: merged-/usr vs. partially-symlink-farmed-root Ansgar <ansgar@43-1.org> - 2021-08-22 23:30 +0200
                Re: merged-/usr vs. partially-symlink-farmed-root Marvin Renich <mrvn@renich.org> - 2021-08-23 16:40 +0200
                Re: merged-/usr vs. partially-symlink-farmed-root Ansgar <ansgar@43-1.org> - 2021-08-23 17:20 +0200
                Re: merged-/usr vs. partially-symlink-farmed-root Marvin Renich <mrvn@renich.org> - 2021-08-23 18:30 +0200
                Re: merged /usr vs. symlink farms Tomas Pospisek <tpo2@sourcepole.ch> - 2021-08-22 21:30 +0200
                Re: testing for rootfs vs. /usr reproducibility regressions Simon McVittie <smcv@debian.org> - 2021-08-19 12:50 +0200
                Re: testing for rootfs vs. /usr reproducibility regressions Helmut Grohne <helmut@subdivi.de> - 2021-08-20 10:20 +0200
                Re: testing for rootfs vs. /usr reproducibility regressions Simon McVittie <smcv@debian.org> - 2021-08-20 12:40 +0200
                Re: testing for rootfs vs. /usr reproducibility regressions Timothy M Butterworth <timothy.m.butterworth@gmail.com> - 2021-08-20 23:40 +0200
                Re: testing for rootfs vs. /usr reproducibility regressions Andy Smith <andy@strugglers.net> - 2021-08-21 19:30 +0200
                Re: testing for rootfs vs. /usr reproducibility regressions Timothy M Butterworth <timothy.m.butterworth@gmail.com> - 2021-08-21 22:20 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion Luca Boccassi <bluca@debian.org> - 2021-08-18 00:10 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion Sam Hartman <hartmans@debian.org> - 2021-08-18 07:00 +0200
                Re: A summary of where I think we are on the technical side of the  merged /usr discussion Tim Woodall <debiandevel@woodall.me.uk> - 2021-08-18 18:20 +0200
                Changing how you do things: Was Re: merged /usr Tim Woodall <debiandevel@woodall.me.uk> - 2021-08-18 09:50 +0200
                Re: Changing how you do things: Was Re: merged /usr David Kalnischkies <david@kalnischkies.de> - 2021-08-18 15:00 +0200
                Re: merged /usr David Kalnischkies <david@kalnischkies.de> - 2021-08-16 11:50 +0200
                Re: merged /usr Holger Levsen <holger@layer-acht.org> - 2021-08-17 11:50 +0200
                Re: merged /usr Vagrant Cascadian <vagrant@reproducible-builds.org> - 2021-08-17 18:30 +0200
                Re: merged /usr Simon McVittie <smcv@debian.org> - 2021-08-17 19:00 +0200
                Re: merged /usr Holger Levsen <holger@layer-acht.org> - 2021-08-17 19:20 +0200
                Re: merged /usr Wouter Verhelst <wouter@debian.org> - 2021-08-16 16:10 +0200
                Re: merged /usr Wouter Verhelst <wouter@debian.org> - 2021-08-16 16:10 +0200
                Re: merged /usr Marco d'Itri <md@Linux.IT> - 2021-08-16 16:20 +0200
                Re: merged /usr Wouter Verhelst <wouter@debian.org> - 2021-08-16 17:00 +0200
                Re: merged /usr Marc Haber <mh+debian-devel@zugschlus.de> - 2021-08-17 19:10 +0200
                Re: merged /usr Sam Hartman <hartmans@debian.org> - 2021-08-16 23:50 +0200
                Re: merged /usr Wouter Verhelst <wouter@debian.org> - 2021-07-27 17:10 +0200
    Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Svante Signell <svante.signell@gmail.com> - 2021-07-18 21:00 +0200
      Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-18 23:50 +0200
      Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-19 00:00 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Andy Smith <andy@strugglers.net> - 2021-07-19 01:50 +0200
      Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-19 00:10 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Marco d'Itri <md@Linux.IT> - 2021-07-19 00:20 +0200
          Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-19 00:30 +0200
            Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Russ Allbery <rra@debian.org> - 2021-07-19 01:30 +0200
            Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Russ Allbery <rra@debian.org> - 2021-07-19 01:30 +0200
              Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-19 03:20 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Russ Allbery <rra@debian.org> - 2021-07-19 04:10 +0200
              Re: merged /usr considered harmful (was Re: Bits from the Technical Committee) Marc Haber <mh+debian-devel@zugschlus.de> - 2021-07-19 07:30 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Stephan Verbücheln <verbuecheln@posteo.de> - 2021-07-19 07:50 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Marco d'Itri <md@Linux.IT> - 2021-07-19 10:30 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Michael Biebl <biebl@debian.org> - 2021-07-19 15:30 +0200
                Re: merged /usr considered harmful (was Re: Bits from the Technical Committee) Marc Haber <mh+debian-devel@zugschlus.de> - 2021-07-19 18:40 +0200
      Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Svante Signell <svante.signell@gmail.com> - 2021-07-19 00:30 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Russ Allbery <rra@debian.org> - 2021-07-19 01:30 +0200
  Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Thomas Goirand <zigo@debian.org> - 2021-07-16 10:10 +0200
    Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Thomas Goirand <zigo@debian.org> - 2021-07-16 13:40 +0200
    Re: merged /usr considered harmful Thorsten Glaser <tg@debian.org> - 2021-07-17 23:20 +0200
      Re: merged /usr considered harmful Geert Stappers <stappers@stappers.nl> - 2021-07-18 08:40 +0200
    Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Simon McVittie <smcv@debian.org> - 2021-07-18 00:30 +0200
      Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Marco d'Itri <md@Linux.IT> - 2021-07-18 11:20 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Bastian Blank <waldi@debian.org> - 2021-07-18 12:30 +0200
        Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Stephan Verbücheln <verbuecheln@posteo.de> - 2021-07-18 13:20 +0200
          Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Andrey Rahmatullin <wrar@debian.org> - 2021-07-18 13:20 +0200
          Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Marco d'Itri <md@Linux.IT> - 2021-07-18 18:00 +0200
            Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Stephan Verbücheln <verbuecheln@posteo.de> - 2021-07-18 19:00 +0200
              Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Andrey Rahmatullin <wrar@debian.org> - 2021-07-18 19:20 +0200
              Re: merged /usr considered harmful (was Re: Bits from the Technical  Committee) Andrey Rahmatullin <wrar@debian.org> - 2021-07-18 19:20 +0200

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