[RHEL kernel bug] XCP vm fails to boot after newest kernel applied.

Greg_E

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.

XCP-ng-JustGreat

@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.

bufanda

@Greg_E according to the Knowledge base of Redhawks it is den Witz Intel CPUs. So you AMD isn‘t affected

phil

According to https://access.redhat.com/solutions/7116307 the bug is solved, but I don't get newer Kernels on Rocky yet.

Greg_E

@phil

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.

bberndt

@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.

olivierlambert

It's now available, yes After update, reboot will work

edit: ha answered for RH, Alma and Rocky will follow soon I suppose

Greg_E

@olivierlambert

I just updated an Alma 8 and it has the .51 kernel now.

bberndt

@Greg_E said in XCP vm fails to boot after newest kernel applied.:

@olivierlambert

I just updated an Alma 8 and it has the .51 kernel now.

Tried one of my Rocky's and still .50. I wonder where we can see the status of downstream fixes like that? anyone know? thanks.

Greg_E

@bberndt

This may sound stupid, but here goes...

Does Rocky need to update to .50 before it can update to .51?

I'd guess no, but I've been away from RHEL based stuff since the IBM rug pull. Only coming back because I may need it in the future as I jockey around trying to improve my paycheck.

bberndt

@Greg_E said in XCP vm fails to boot after newest kernel applied.:

@bberndt

This may sound stupid, but here goes...

Does Rocky need to update to .50 before it can update to .51?

I'd guess no, but I've been away from RHEL based stuff since the IBM rug pull. Only coming back because I may need it in the future as I jockey around trying to improve my paycheck.

https://bugs.rockylinux.org/view.php?id=9307
so, prolly soon-ish.

Greg_E

@bberndt

Alma must have dropped everything to push this out. I wonder what Oracle is doing, guessing they were hit by this too. I'd guess Rocky has this out pretty fast, they know it is important.

glreed735

I updated my Redhat 8 instances to the .51 kernel and it's back to working.

The kernel version 4.18.0-553.51.1.el8_10.x86_64 for Red Hat Enterprise Linux 8 was released on April 30, 2025, as part of the bug fix advisory RHBA-2025:4337.

This update addresses various issues and includes enhancements to improve system stability and performance. For detailed information about the fixes and improvements in this release, you can refer to the official Red Hat advisory.

bberndt

.51 for Rocky showed up today. Running my first test. and from .22.

Seems successful!

olivierlambert

Great news Closing this as fixed. Thanks everyone for your feedback!