[pve-devel] little iops with PVE kernel than vanilla 3.5

[Stefan Priebe]

Hello list,

i'm still trying to tune my Proxmox environment.

On my KVM Host i get constant 100.000 4k random iops with vanilla 3.5 
and latest PVE kernel - so no difference.

But inside VM using LVM block device with virt io:

PVE Kernel:
1 VM: 15k iops
2 VM: 2x10k iops

3.5 vanilla Kernel:
1 VM: 60k iops
2 VM: 2x30k iops

Anything we can do about that?

Greets,
Stefan