[pve-devel] pve-kernel from repos more recent that proxmox git ?

[Alexandre DERUMIER]

>> I guess that has serious disadvantages? 

Don't really know. I think it's only use if we are really low in memory.
Trying to defrag to have some more hugepages free.
And with ksm in the game, I don't really know all they are interacting together.


>> Maybe a stupid question, but can't we enable that only for KVM processes? 
I don't think it's possible. It's enable for the whole system.



Maybe can we simply add an option in proxmox to define if user want use or not hugepage ?

(put in an init.d by example an "echo never|always > /sys/kernel/mm/redhat_transparent_hugepage/enabled")


----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com>, pve-devel at pve.proxmox.com 
Envoyé: Lundi 9 Avril 2012 15:48:26 
Objet: RE: [pve-devel] pve-kernel from repos more recent that proxmox git ? 

> differents threads reports that disable defrag is enough as workaround 
> 
> echo never > /sys/kernel/mm/redhat_transparent_hugepage/defrag 

I guess that has serious disadvantages? 

> Transparent hugepages is a great benefits for virtual machine with lot of 
> memory,or doing a lot of memory access like databases. 

Maybe a stupid question, but can't we enable that only for KVM processes? 

- Dietmar 



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