As promised, I have an update on the lab machine I left running ksm_refcnt_overflow.sh for a week straight.
The machine was running 4.15.0-116-generic from -proposed: $ uname -rv 4.15.0-116-generic #117-Ubuntu SMP Fri Aug 28 16:04:22 UTC 2020 $ uptime 04:36:14 up 7 days, 1 min, 1 user, load average: 3.47, 3.14, 2.97 In that time it has created and destroyed 32,950 virtual machines: $ virsh list Id Name State ---------------------------------------------------- 32945 instance-0 running 32946 instance-1 running 32947 instance-2 running 32948 instance-3 running 32949 instance-4 running If we look at the current value of the reference counter, it is still set to 1: $ cat /proc/zero_page_refcount Zero Page Refcount: 0x1 or 1 I checked /var/log/kern.log, /var/log/syslog and journalctl, there are no oops messages, and the KVM subsystem is stable. I am shutting the lab machine down now, as I am convinced the patch is stable. This SRU is still verified. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1837810 Title: KVM: Fix zero_page reference counter overflow when using KSM on KVM compute host To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1837810/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
