Your message dated Wed, 04 Oct 2023 22:36:07 +0000
with message-id <[email protected]>
and subject line Bug#1039248: fixed in kexec-tools 1:2.0.27-1
has caused the Debian Bug report #1039248,
regarding systemd-sysv: reboot doesn't honor the grub-reboot settings; reboot
-f does
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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misconfiguration somewhere. Please contact [email protected]
immediately.)
--
1039248: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1039248
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: systemd-sysv
Version: 252.6-1
Severity: normal
Dear Maintainer,
* What led up to the situation?
I was updating the gce-xfstests[1] test appliance to Debian Bookworm from
Debian Bullseye.
[1] https://thunk.org/gce-xfstests
* What exactly did you do (or not do) that was effective (or
ineffective)?
Unfortunately kexec has not been reliable ever since sometime after the
5.4 kernel, at least on Google Compute Engine VM's. (About 30-40% of
the time, the VM hangs after the kexec; about 10% of the time, the
machine is up, but it is very slow and limping, and /proc/interrupts
shows that some interrupt channel is going wild. This is no doubt the
kernel bug interacting with some virtual hardware in the GCE VM, but
I've never been able to debug it.)
Because of issues with kexec, the primary way that I reboot into the
kernel that I want to test is to install the kernel as a dpkg package,
and then examine /boot/grub/grub.cfg to find out where it was inserted
into the grub's menu listing, and then run a command like "grub-reboot
1>4", where the number is found by examing the grub.cfg file. An
example of this works can be found here[2].
[2]
https://github.com/tytso/xfstests-bld/blob/9bae3253d57456987d995cf85379e9165e054381/test-appliance/files/usr/local/lib/gce-load-kernel#L169
This works *just* *fine* when using Debian Bullseye (which is using
systemd 247.3-7+deb11u2).
* What was the outcome of this action?
Unfortunately, this no longer works in Debian Bookworm (with systemd
252.6-1). In Debian Bookworm, the grub-reboot(8) setting is ignored
after triggering a reboot via /sbin/reboot.
Connecting to the serial console, it appears that "reboot" is going
through some code path that does NOT involve triggering a BIOS message
and going through grub, where (assuming the GRUB_TIMEOUT is set to some
non-zero value like 15) the grub menu would be displayed, and after 15
seconds, it would boot the kernel specified by grub-reboot, and then
clear the next_entry entry in /boot/grub/grubenv.
Instead, systemd appears to boot the default kernel, ignoring
/boot/grub/grubenv, so I don't enter the kernel which I had just
installed, and had selected via the grub-reboot(8) command. Looking at
/boot/grub/grubenv, it still has the "next_entry=1>4" set by
grub-reboot(8), so it appears that /boot/grub/grubenv is being
completely ignored by reboot.
*However*, it is properly handled if I use reboot -f. The "reboot -f"
command will briefly show the BIOS version information, and then the
Grub Menu, and then will boot the kernel selected by grub-reboot(8), and
afterwords the next_entry field is cleared from /boot/grub/grubenv. So
this is not a "grub" problem, but in the reboot path selected by systemd
when doing a clean shutdown via the "reboot" command. As near as I can
tell, grub is being bypassed, or at least grub is getting called in some
way whic causes it to ignore the /boog/grub/grubenv parameter.
In Debian Bookworm, "reboot" works like "reboot -f", in that we go
through the BIOS initialization step, printing the BIOS version, and
then grub is invoked in such a way that /boot/grub/grubenv is honored.
* What outcome did you expect instead?
The "reboot" command should go through the normal, full reboot sequence,
such that grub-reboot(8) works correctly. As a workaround, I've
replaced
reboot
sleep 60
with
sync /boot
sync
sleep 1
reboot -f
sleep 60
However, it would be desirable to let the system go through a full,
clean shutdown, with file systems properly unmounted or remounted
read-only in the case of the root file system.
-- System Information:
Debian Release: 12.0
APT prefers stable
APT policy: (900, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.1.0-9-amd64 (SMP w/20 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages systemd-sysv depends on:
ii systemd 252.6-1
Versions of packages systemd-sysv recommends:
ii libnss-systemd 252.6-1
ii libpam-systemd 252.6-1
systemd-sysv suggests no packages.
-- no debconf information
--- End Message ---
--- Begin Message ---
Source: kexec-tools
Source-Version: 1:2.0.27-1
Done: Khalid Aziz <[email protected]>
We believe that the bug you reported is fixed in the latest version of
kexec-tools, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Khalid Aziz <[email protected]> (supplier of updated kexec-tools package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Wed, 04 Oct 2023 16:17:28 -0600
Source: kexec-tools
Architecture: source
Version: 1:2.0.27-1
Distribution: unstable
Urgency: medium
Maintainer: Khalid Aziz <[email protected]>
Changed-By: Khalid Aziz <[email protected]>
Closes: 1028416 1030248 1032000 1034616 1039248 1051962
Changes:
kexec-tools (1:2.0.27-1) unstable; urgency=medium
.
* New upstream release (Closes: #1051962)
* Updated turkish translation (Closes: #1034616)
* Added romanian translation (Closes: #1032000)
* Make "kexec -a" the default. This fix was pulled into upstream
2.0.26 release (Closes: #1030248)
* Removed trailing whitespaves from rules and changelog files
* Updated version for watch file and replaced http with https
* Updated control file, cleaned up rules file, made copyright file
dep5 compliant
* Removed init files. Removed automatic kexec reboot when enabled
and associated config option (kexec-tools/load_kexec or
LOAD_KEXEC in /etc/default/kexec). kexec reboot functionality
has been integrated into systemctl now and will likely move to
logind in near future. (Closes: #1039248)
* Package now provides a script - kexec-load-kernel. To perform a
kexec reboot, ensure /etc/default/kexec has the desired value for
USE_GRUB_CONFIG. Use the sequence "kexec-load-kernel;
systemctl kexec" or "kexec-load-kernel; reboot"
(Closes: #1028416)
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