[pve-devel] proxmox 4.0 : "Could not set AIO state: File descriptor in bad state" qemu error with more than 129 kvm (129 disks)

[Dietmar Maurer]

> On October 12, 2015 at 6:53 PM Alexandre DERUMIER <aderumier at odiso.com> wrote:
> 
> 
> Hi, 
> 
> I have upgraded a server with a lot of vm (160vms), 
> 
> each vms is a clone of a template and they are 1 disk by vm 
> 
> When I started the 130th vm, I have this error 
> 
> kvm: -drive
> file=/var/lib/vz/images/104/vm-104-disk-1.qcow2,if=none,id=drive-virtio0,format=qcow2,cache=none,aio=native,detect-zeroes=on:
> Could not set AIO state: File descriptor in bad state
> 
> 
> Stopping another vm, and start the 130th is working.
> 
> 
> Seem to be a system limit.

Wild guess - maybe it is related to INotify?

# cat /proc/sys/fs/inotify/max_user_instances

We already run into that limit with LXC containers recently.
Please can you test?