[RHEL kernel bug] XCP vm fails to boot after newest kernel applied.
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If I find an hour, I'll give Rocky 8 a try.
Could you use LEAPP to migrate that to Alma, maybe they are doing something differently which is why mine are working.
I can tell you, there is nothing special that I'm doing, my systems are as vanilla as they get.
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@Greg_E said in XCP vm fails to boot after newest kernel applied.:
If I find an hour, I'll give Rocky 8 a try.
Could you use LEAPP to migrate that to Alma, maybe they are doing something differently which is why mine are working.
I can tell you, there is nothing special that I'm doing, my systems are as vanilla as they get.
@Greg_E
google AI says what I think is familiar:
Rocky Linux strives for 1:1 bug-for-bug compatibility with RHEL, while Alma Linux is more of an RHEL rebuild, making some adjustments and adding its own features -
Ok, that might explain the difference.
Would a LEAPP from Rocky 8 up to Alma 9 be possible and solve the issue?
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@Greg_E said in XCP vm fails to boot after newest kernel applied.:
@bberndt
I just installed a fresh Alma 8, did yum update to see what would happen, and it's still working. Gave out the same kernel as above.
This was installed UEFI on XCP-ng 8.3 which was a fresh install a few days ago from a nightly (near release?) ISO. It was installed to an NFS share, 2 cores and 4GB with an Intel i1000 interface. Xenserver tools 8.4.0-1 installed.
There are no extra packages installed yet, could this be a package conflict.
Anything else I can check to see why mine works and others are failing?
Hmm....I did the same and that VM died just like any other with the broken kernel.
Although I used the Cloud Image so not completly new install from scratch.
Maybe I'll check building a new cloud image what will happen then. -
How many of these that are failing have been upgraded from a previous version? Could it be something left over from EL7 or early EL8?
My Alma 8.10 base install is still running fine, did a yum update to apply a few more things and reboot and still working with the same kernel version above. But again, this was a clean fresh install, not something that's been running for a while.
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FYI, there's a patch submitted to linux-stable (6.6 and earlier) but not yet in a stable release:
https://lore.kernel.org/stable/20250411160833.12944-1-jason.andryuk@amd.com/I guess we'll have to wait until this is picked up by Linux, then Red Hat will have to pick that as well.
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@Greg_E said in XCP vm fails to boot after newest kernel applied.:
Ok, that might explain the difference.
Would a LEAPP from Rocky 8 up to Alma 9 be possible and solve the issue?
I did a (not LEAPP, but a migration script from Alama) from Rocky 8 to Alma 8, and it died. None of my Rocky 9's have had a problem so far, and of course end up with a completely different kernel.
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@Greg_E They are all running for a while but none where upgrades from RHEL 7 to RHEL 8. I don't do LEAPPs that gives me more often errors than it works. What I did though on one is replacing the System VDI with a newer one, but that was Alma 8 to Alma 9 and that one has no issues.
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@bberndt you Rocky/Alma 9 will be fine since it's a bug in the kernel for 8 only.
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This is just a "me too" reply to indicate that I am also experiencing the boot failure immediately after upgrading AlmaLinux 8.10 to the latest kernel 4.18.0-553.50.1. Hopefully, the kernel fix will get integrated soon into the affected and popular RedHat 8 derivatives so that Alma and Rocky 8 et al. can continue to run on our favorite hypervisor. This is a bad one.
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Strange that my fresh Alma 8.10 is still working after updates, makes me think k there is more to this than just the kernel.
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@Greg_E Wondering what might be the difference? I am using the XenServer Linux tools version 8.4.0-1 and BIOS boot firmware.
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I'm running the same guest tools.
Could it be a processor related issue? I'm running AMD v1756b in my lab, haven't had time to try in production that is Intel Silver.
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@Greg_E Maybe it only affects Intel? That would be a new wrinkle. Perhaps other AMD users can confirm if the latest AlmaLinux 8 kernel runs fine on their AMD XCP-ng 8.3 hosts? Just read the above referenced RedHat bug report here: https://access.redhat.com/solutions/7116307 Sure enough, it says Xen + Intel in problem description. Check it out.
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@Greg_E according to the Knowledge base of Redhawks it is den Witz Intel CPUs. So you AMD isn‘t affected
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According to https://access.redhat.com/solutions/7116307 the bug is solved, but I don't get newer Kernels on Rocky yet.
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Sad that even this documentation is locked behind a Redhat account, I can only read part of the problem description. Not going to make an account because it really doesn't affect me right now.
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@Greg_E
I made a free account.
Resolution
The issue has been resolved with the errata: RHBA-2025:4337. Hence, update the kernel to kernel-4.18.0-553.51.1.el8_10 to fix the issue.id assume it arrives soon? I as well, haven't seen it yet.
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It's now available, yes
After update, reboot will workedit: ha answered for RH, Alma and Rocky will follow soon I suppose
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I just updated an Alma 8 and it has the .51 kernel now.
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