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

2016-12-14 Thread Alexandre DERUMIER
omponent (if applicable): 219-19.el7_2.4.x86_64 " - Mail original - De: "Alexandre Derumier" <aderum...@odiso.com> À: "Wolfgang Bumiller" <w.bumil...@proxmox.com> Cc: "pve-devel" <pve-devel@pve.proxmox.com> Envoyé: Mercredi 14 Décem

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

2016-12-14 Thread Alexandre DERUMIER
YES and "movable_node" boot kernel parameter enabled - Mail original - De: "Wolfgang Bumiller" <w.bumil...@proxmox.com> À: "Alexandre Derumier" <aderum...@odiso.com> Cc: "pve-devel" <pve-devel@pve.proxmox.com>, "diet

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

2016-12-14 Thread Wolfgang Bumiller
> On December 14, 2016 at 3:45 PM Alexandre DERUMIER > wrote: > > > >>3) Drop support for hot*UN*plugging altogether and simply always hot-add > >>one big dimm. ;-) > >>On that note, my guests currently hang when I unplug memory and I bet > >>that happens to all of you and

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

2016-12-14 Thread Alexandre DERUMIER
umil...@proxmox.com> À: "Alexandre Derumier" <aderum...@odiso.com> Cc: "dietmar" <diet...@proxmox.com>, "pve-devel" <pve-devel@pve.proxmox.com> Envoyé: Mercredi 14 Décembre 2016 15:07:16 Objet: Re: [pve-devel] qemu memory hotplug limited to 64 dimm

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

2016-12-14 Thread Wolfgang Bumiller
So I see a few options one or more of which we should consider: 1) Make the *static* memory size configurable: It doesn't make sense to me to eg. want to go from 1G to 200G in small steps. Worse is the fact that even when starting with a higher amount knowing that I'm only going to increase it,

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

2016-12-13 Thread Alexandre DERUMIER
m size could be great too. - Mail original - De: "dietmar" <diet...@proxmox.com> À: "Wolfgang Bumiller" <w.bumil...@proxmox.com> Cc: "aderumier" <aderum...@odiso.com>, "pve-devel" <pve-devel@pve.proxmox.com> Envoyé: Mardi 1

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

2016-12-13 Thread Dietmar Maurer
> > Any drawbacks? > > It's a hack... I find the idea of configuring the dimm size more > appealing. Why would you want a huge amount of tiny DIMMs in a VM, Because it works out of the box (for the users) ... > especially if it means kernel-patching... ? :| Why is that patch not applied to

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

2016-12-13 Thread Dietmar Maurer
> > I have asked to user to modprobe vhost module with region at 509, seem to > > works fine. > > > > maybe can we force it in kernel directly ? Oh, are all 5 patches missing from current kernel? Or do we only need to increase the value? ___ pve-devel

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

2016-12-13 Thread Wolfgang Bumiller
On Tue, Dec 13, 2016 at 04:26:06PM +0100, Dietmar Maurer wrote: > > > > On December 13, 2016 at 4:12 PM Alexandre DERUMIER > > wrote: > > > > > > I have asked to user to modprobe vhost module with region at 509, seem to > > works fine. > > > > maybe can we force it in

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

2016-12-13 Thread Dietmar Maurer
rs/vhost/vhost.c:static ushort max_mem_regions = 64; What value should we set exactly? Any drawbacks? > > > - Mail original - > De: "aderumier" <aderum...@odiso.com> > À: "pve-devel" <pve-devel@pve.proxmox.com> > Envoyé: Lundi 12 Décemb

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

2016-12-13 Thread Alexandre DERUMIER
he parent region, then the child region) - Mail original - De: "aderumier" <aderum...@odiso.com> À: "pve-devel" <pve-devel@pve.proxmox.com> Cc: "dietmar" <diet...@proxmox.com> Envoyé: Lundi 12 Décembre 2016 19:42:03 Objet: Re: [pve-d

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

2016-12-12 Thread Alexandre DERUMIER
: "aderumier" <aderum...@odiso.com> À: "pve-devel" <pve-devel@pve.proxmox.com> Cc: "dietmar" <diet...@proxmox.com> Envoyé: Lundi 12 Décembre 2016 19:42:03 Objet: Re: [pve-devel] qemu memory hotplug limited to 64 dimm I found some kernel patch to bump it

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

2016-12-12 Thread Alexandre DERUMIER
"dietmar" <diet...@proxmox.com> Cc: "pve-devel" <pve-devel@pve.proxmox.com> Envoyé: Lundi 12 Décembre 2016 19:29:54 Objet: Re: [pve-devel] qemu memory hotplug limited to 64 dimm >>Can't we simply increase that max_mem_regions default value? I'm trying to

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

2016-12-12 Thread Alexandre DERUMIER
--- De: "dietmar" <diet...@proxmox.com> À: "aderumier" <aderum...@odiso.com>, "pve-devel" <pve-devel@pve.proxmox.com> Envoyé: Lundi 12 Décembre 2016 17:09:41 Objet: Re: [pve-devel] qemu memory hotplug limited to 64 dimm Can't we simply increase that max_mem_re

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

2016-12-12 Thread Dietmar Maurer
hwork.kernel.org/patch/6709021/ > > - Mail original - > De: "aderumier" <aderum...@odiso.com> > À: "pve-devel" <pve-devel@pve.proxmox.com> > Envoyé: Lundi 12 Décembre 2016 16:51:11 > Objet: [pve-devel] qemu memory hotplug limited to 64 dimm > >

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

2016-12-12 Thread Alexandre DERUMIER
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.no