Hi Krystian, Here's an update on the mainline kernel tests you requested, running in parallel on three separate hosts (all part of the same 5-host affected group):
**srv05 - linux-generic-hwe-24.04 (kernel 7.0.0-29-generic):** Uptime: 2 days, 21+ hours, no panic. **srv06 - mainline v6.16.0 (linux-image-unsigned-6.16.0-061600-generic), includes commit 9709eb0f845b:** Uptime: 1 day, 2+ hours, no panic. **srv07 - mainline v6.15.11 (linux-image-unsigned-6.15.11-061511-generic), predates commit 9709eb0f845b (committed 2025-05-23/merged 2025-05-31, after the 6.15 release on 2025-05-15, with no `Cc: [email protected]` tag visible in the commit, so I don't believe it was backported to 6.15.x):** Uptime: 1 day, 2+ hours 53 min, no panic. ``` root@srv05:~# uptime; uname -r 13:38:36 up 2 days, 21:18, 1 user, load average: 2.36, 3.67, 4.05 7.0.0-29-generic root@srv07:~# uptime; uname -r 13:38:54 up 1 day, 2:53, 2 users, load average: 6.49, 6.31, 6.50 6.15.11-061511-generic root@srv06:~# uptime; uname -r 13:38:59 up 1 day, 2:03, 1 user, load average: 7.07, 6.88, 6.75 6.16.0-061600-generic ``` All hosts have their full production VM load running continuously (13-20 guest VMs each) with no issues. Notably, srv07 on 6.15.11 - which I believe does *not* include your suggested fix - has now been stable for over 26 hours, exceeding the 1-24 hour window in which panics previously occurred on 6.8.0-137. This is longer than I expected if the fix is the sole cause, so at this point I can't yet conclusively confirm or rule out commit 9709eb0f845b as the fix based on uptime alone. I'll keep all three hosts running and report back with longer-term results. One note: I'll be on vacation from 2026-08-22 to 2026-08-30 and won't be able to run further tests or monitor these hosts during that period. I'll pick this back up once I'm back. Thanks again for your help on this. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2163642 Title: Kernel panic "Attempted to kill the idle task" on AMD Opteron multi- node NUMA under KVM (6.8.0-137) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2163642/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
