[pve-devel] question about pve-qemu && librbd

[Alexandre DERUMIER]

I have tested pve-qemu-kvm builded with last librbd-dev, and it's working fine also with jewel cluster.


Could we bump dependencies && dev dependencies of debian pve-qemu package  to last librbd ?

(maybe put tha last librbd in proxmox main repo, as currently it's only in proxmox  ceph repo ?)




----- Mail original -----
De: "aderumier" <aderumier at odiso.com>
À: "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Samedi 23 Septembre 2017 11:41:48
Objet: [pve-devel] question about pve-qemu && librbd

Hi, 

I was trying to help some users on the forum about potention performance regression 

https://forum.proxmox.com/threads/3000-msec-ping-and-packet-drops-with-virtio-under-load.36687/page-2 


and I have build for pve-qemu-kvm with the qemu patch that wolfgang has made some days ago. 

use said me that he have this error: 

" 
but I get an error when I try to start the VM: 
[CODE]kvm: symbol lookup error: kvm: undefined symbol: rbd_aio_writev 
command 'kvm -version' failed: exit code 127 
TASK ERROR: detected old qemu-kvm binary (unknown)[/CODE][/QUOTE] 
" 


rbd_aio_writev is a new feature introduce in last librbd and qemu, to improve performance. 

I just wonder why user don't have problem with official proxmox pve-qemu-kvm build ? 
(I'm not sure, but I think he using default debian repo jewel librbd) 

Maybe proxmox repo pve-qemu-kvm is build with old librbd from jewel ? 
(if yes, maybe we don't have currently rbd_aio_writev optimisation) 

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