OTOH I wonder to some extend how you exceded the 65k with "just" 18 guests. Not strictly required, but it might be very interesting before your system becomes unavailable to track: $ sysctl fs.aio-nr while starting the guests. How much get added per guest, would the settle down after the guest is done with initial rampup.
** Changed in: kvm (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1717224 Title: virsh start of virtual guest domain fails with internal error due to low default aio-max-nr sysctl value To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1717224/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs