[pve-devel] some finding avout minimum static memory when pc-dimm exists

Alexandre DERUMIER aderumier at odiso.com
Sun Jan 25 14:10:58 CET 2015


>>Yes. (I don't have check qemu code limit, but maxmemory=2TB is working) 

But, I don't known with current mapping how we can reach any maxmemory size with 255 slots.

maybe if use can specify maxmemory, we can do a different mapping related to the maxmemory.


----- Mail original -----
De: "aderumier" <aderumier at odiso.com>
À: "dietmar" <dietmar at proxmox.com>
Cc: "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Dimanche 25 Janvier 2015 13:57:32
Objet: Re: [pve-devel] some finding avout minimum static memory when pc-dimm exists

>>I don't like to have that 'maxmemory' restriction. If hotplug is enabled, I want 
>>to be able to 
>>add unlimited amount of memory? 
Yes. (I don't have check qemu code limit, but maxmemory=2TB is working) 



----- Mail original ----- 
De: "dietmar" <dietmar at proxmox.com> 
À: "aderumier" <aderumier at odiso.com>, "pve-devel" <pve-devel at pve.proxmox.com> 
Envoyé: Vendredi 23 Janvier 2015 18:03:34 
Objet: Re: [pve-devel] some finding avout minimum static memory when pc-dimm exists 

> But maybe could be do something like: 
> 
> without dimm hotplug 
> -------------------- 
> [CONF] 
> memory: 1024 
> 
> kvm -m 1024 
> 
> with dimm hotplug 
> ------------------ 
> [CONF] 
> memory: 1024 
> maxmemory: 8192 (this enable dimm hotplug) 
> 
> 
> kvm -m size=512,slots=255,maxmemory=8192 -pcdimm 512M .... 
> 
> 
> We reserve the first 512M as static, and assign pcdimms for the remaining 
> memory. 
> 
> 
> Like this we only need 1 memory option (min:512), which seem easier for user. 
> 
> What do you think about it ? 

I don't like to have that 'maxmemory' restriction. If hotplug is enabled, I want 
to be able to 
add unlimited amount of memory? 

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