[pve-devel] qemu memory hotplug limited to 64 dimm

[Alexandre DERUMIER]

vhost 64 limit has been introduced here, because of qemu crash with bigger value

https://patchwork.kernel.org/patch/6709021/

----- Mail original -----
De: "aderumier" <aderumier at odiso.com>
À: "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Lundi 12 Décembre 2016 16:51:11
Objet: [pve-devel] qemu memory hotplug limited to 64 dimm

Hi, 

a proxmox user has reported problem to hotplug memory with high values (48G) 

https://forum.proxmox.com/threads/apt-get-upgrade-to-update-proxmox-server.30992/ 


Seem that qemu check about a vhost value 

https://lists.nongnu.org/archive/html/qemu-devel/2015-07/msg05998.html 

cat /sys/module/vhost/parameters/max_mem_regions > 64 (verified on my servers). 


I think this limit was not present when we have implemented hotplug. 

Not sure was we can do, but I think our method don't scale anymore :( 

Maybe should we introduce a new fixed "dimm size" option, to allow hotplug of more memory ? 



_______________________________________________ 
pve-devel mailing list 
pve-devel at pve.proxmox.com 
http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel