5.15.x Kernel and Issues

[adamb]

Yea I am testing 6.1 heavily and so far its working great. 5.19 isn't being updated anymore from my understanding so its not an option for us.

 

[adamb]

Just wanted to mention.

While getting some front ends moved to 6.1.x, I hit VM lockups on every VM going from a DL 560 Gen10 with 5.15.83 to a DL 560 Gen10 with 6.1.2-1. Both servers are identical. Once both were on 6.1.2-1 all was well.

Appears to be more than just a generation issue for live migration.

Either way 6.1.2-1 seems solid so far, but I wanted to mention it.

 

[adamb]

Ended up running into a significant CPU performance isssue on the 6.1 kernel. Looks like we will be forced back to 5.13.x at this point. What a mess.

 

[spirit]

Ended up running into a significant CPU performance isssue on the 6.1 kernel. Looks like we will be forced back to 5.13.x at this point. What a mess.

maybe retbleed mitigation ?

https://securityboulevard.com/2022/09/retbleed-linux-slower-richixbw/


(Not sure if it's still buggy in 6.1 and fixed on 6.2)

 

[adamb]

maybe retbleed mitigation ?

https://securityboulevard.com/2022/09/retbleed-linux-slower-richixbw/


(Not sure if it's still buggy in 6.1 and fixed on 6.2)

These are Gen2 Intels which from what I understand are not effected.