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IDProjectCategoryView StatusLast Update
0000082Rocky-Linux-8dnfpublic2022-05-05 18:19
ReporterAlex Corcoles Assigned ToRelease Engineering  
Status assignedResolutionopen 
Summary0000082: dnf needs-restart does not work well on Raspberry Pi

I think I got the update that supposedly fixes #190. dnf needs-restart now checks the uptime by looking at the mtime of /proc/1.

This might work on other environments, but on a Raspberry Pi 4, this file has an mtime of 1970 and I cannot even touch it to fix it.

So dnf needs-restart is completely borked there.


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Alex Corcoles

Alex Corcoles

2022-02-03 10:02

reporter   ~0000096

To be clear, I think the bug is the mtime on /proc/1 on a Raspberry Pi. On other systems it's apparently the boot time.
Skip Grube

Skip Grube

2022-05-03 14:46

manager   ~0000113

Just adding an update here: I'm 99.9% certain this is because the Raspberry Pi has no internal clock, and so it defaults to Jan 1, 1970 (epoch) when the system does its early boot.

I'm still pondering this issue, but I don't really have a good solution right now. Best bet as a workaround (for now) is to patch that DNF plugin to use a different source for system boot time.

I would expect this same behavior on any system with no internal clock, a dead CMOS battery, etc.

Still brainstorming if there's a better solution to this.
Alex Corcoles

Alex Corcoles

2022-05-03 16:48

reporter   ~0000115

Yeah, I had no idea that the RPI has no clock :( Everything fits that explanation, IMHO.

My only concern is that I don't think RHEL 8 supports any hardware with a "malfunctioning" clock, so they might be hesitant to patch the DNF plugin to do the proper thing (although I *think* that's the most correct solution). I am happy to file a bug (to the CentOS 8 bug tracker, corresponding to the DNF plugin RPM, I assume?) and see how that plays out. (If you have a more direct communication with upstream, maybe you want to report that yourself?)

Thinking out a little bit, the other options I can think of:

* Do something similar to fake-hwclock. However, fake-hwclock specifically seems to be a systemd service, so I think it would be too late for this to work. And I didn't see anything like a kernel command-line parameter that lets you set a custom time.
* Find a way to change the mtime of /proc/1 when the date is set via NTP. I only thought to remount /proc, but that doesn't seem to change anything
* Create an alternate package just for Rocky Linux 8 / RPI that overrides the DNF plugin. I think this option is worse than all other proposals.

Let me know your thoughts. If I don't hear anything, I'll file a bug to CentOS 8 Stream python3-dnf-plugins-core in 1-2 days.


Alex Corcoles

Alex Corcoles

2022-05-05 18:19

reporter   ~0000116

I filed , following the instructions at .

Issue History

Date Modified Username Field Change
2022-05-03 14:46 Skip Grube Note Added: 0000113
2022-05-03 16:48 Alex Corcoles Note Added: 0000115
2022-05-05 18:19 Alex Corcoles Note Added: 0000116