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Hi All,
i've tested profitbricks some time ago - this features really
working, but they have written their on kvm patches and you need
also a custom Kernel for your guest VMs. currently, only
increasing cpus/memory is possible...
On 17.02.2014 11:21, Stefan Priebe - Profihost AG wrote:
Am 17.02.2014 10:46, schrieb Alexandre DERUMIER:
there's also nothing happending inside the guest.
I think you need a really recent kernel for guest.
and also recent udev
(I think that hotplugged memory need to be "onlined" through sysfs, maybe you can do it manually without udev)
not these are not the problems.
The dimms are advertised to the system but don't work.
Kernel guest messages:
ACPI Error: No object attached to node ffff88007b762b40
(20130328/exresnte-127)
ACPI Error: Method parse/execution failed [\_SB_.MHPD.MESC] (Node
ffff88007b762de8), AE_AML_NO_OPERAND (20130328/psparse-537)
ACPI Error: Method parse/execution failed [\_GPE._E03] (Node
ffff88007b7625c8), AE_AML_NO_OPERAND (20130328/psparse-537)
ACPI Exception: AE_AML_NO_OPERAND, while evaluating GPE method [_E03]
(20130328/evgpe-580)
Seems i miss something sadly no idea what ;-)
----- Mail original -----
De: "Stefan Priebe - Profihost AG" <[email protected]>
À: "Alexandre DERUMIER" <[email protected]>
Cc: [email protected]
Envoyé: Lundi 17 Février 2014 10:22:45
Objet: Re: [pve-devel] CPU and Memory hot add
Am 17.02.2014 10:16, schrieb Alexandre DERUMIER:
yeah I've already added them but when I try to add a dimm I always get adding memory 'hotplug' disabled
Do you have also updated seabios ?
i could fix the "error" by using
-m 2048,slots=32,maxmem=64G
instead of
-m 2048,slots=32,maxmem=65536
seems it wants a XG value for maxmem.
Now adding memory and adding a new dimm device does not give an error
anymore but there's also nothing happending inside the guest.
I applied:
http://patchwork.ozlabs.org/patch/292614/
and have then done
make bios in the rom directory of qemu
Stefan
----- Mail original -----
De: "Stefan Priebe - Profihost AG" <[email protected]>
À: "Alexandre DERUMIER" <[email protected]>
Cc: [email protected]
Envoyé: Lundi 17 Février 2014 06:44:02
Objet: Re: [pve-devel] CPU and Memory hot add
Am 17.02.2014 um 06:15 schrieb Alexandre DERUMIER <[email protected]>:
No they don't ;-) here an output of a running vm adding more memory:
Could be interesting to see if they use acpi hotplug.
If yes, they should have somewhere an udev rules for memory hotplug. (and cpu hotplug too)
something like:"
"
# Hotplug physical memory
SUBSYSTEM=="memory", ACTION="" TEST=="state", ATTR{state}=="offline", \
ATTR{state}="online"
"
maybe can you try to remove the udev rules, reboot, try to change memory size, and see if it's working or not
Yes these rules exist and they use acpi hot plug.
last qemu memory acpi hotplug v7 patches are here
http://qemu.11.n7.nabble.com/PATCH-00-27-RFC-v7-ACPI-memory-hotplug-td234477.html
Don't known about the stability, but maybe can you try them ?
Yeah I've already added them but when I try to add a dimm I always get adding memory 'hotplug' disabled
But I don't know why.
Stefan
----- Mail original -----
De: "Stefan Priebe" <[email protected]>
À: "Alexandre DERUMIER" <[email protected]>
Cc: [email protected]
Envoyé: Dimanche 16 Février 2014 21:55:47
Objet: Re: [pve-devel] CPU and Memory hot add
Am 15.02.2014 13:59, schrieb Alexandre DERUMIER:
cpu hot add is already implemented. (even in proxmox ;)
https://git.proxmox.com/?p=qemu-server.git;a=commit;h=838776ab650f0593b48c234070c1a189fdbd72c7
cpu hot del is not yet implemented. (but they are some prelimary patches in the qemu mailing list)
memory hotplug is not yet implemented. (should be ok for next qemu 2.0 release I think)
But maybe they are cheating, like I do : just use ballonning with a fixed size ?
No they don't ;-) here an output of a running vm adding more memory:
[ 356.984360] Hotplug Mem Device
[ 356.985973] init_memory_mapping: 0000000040000000-0000000080000000
[ 356.986070] 0040000000 - 0080000000 page 1G
[ 356.988604] [ffffea0001000000-ffffea00011fffff] PMD ->
[ffff88003ce00000-ffff88003cffffff] on node 0
[ 356.997027] [ffffea0001200000-ffffea00013fffff] PMD ->
[ffff88003c800000-ffff88003c9fffff] on node 0
[ 356.998495] [ffffea0001400000-ffffea00015fffff] PMD ->
[ffff88003c600000-ffff88003c7fffff] on node 0
[ 357.000084] [ffffea0001600000-ffffea00017fffff] PMD ->
[ffff88003b000000-ffff88003b1fffff] on node 0
[ 357.001459] [ffffea0001800000-ffffea00019fffff] PMD ->
[ffff880034c00000-ffff880034dfffff] on node 0
[ 357.004401] [ffffea0001a00000-ffffea0001dfffff] PMD ->
[ffff88003c000000-ffff88003c3fffff] on node 0
[ 357.007038] Hotplug Mem Device
[ 357.024941] Built 1 zonelists in Node order, mobility grouping on.
Total pages: 273785
[ 357.024941] Policy zone: Normal
[ 357.038623] init_memory_mapping: 0000000080000000-00000000c0000000
[ 357.038636] 0080000000 - 00c0000000 page 1G
[ 357.038782] [ffffea0001e00000-ffffea0001ffffff] PMD ->
[ffff88003b400000-ffff88003b5fffff] on node 0
[ 357.040088] [ffffea0002000000-ffffea00021fffff] PMD ->
[ffff880047e00000-ffff880047ffffff] on node 0
[ 357.040756] [ffffea0002200000-ffffea00025fffff] PMD ->
[ffff88007fc00000-ffff88007fffffff] on node 0
[ 357.044036] [ffffea0002600000-ffffea00029fffff] PMD ->
[ffff88007f800000-ffff88007fbfffff] on node 0
[ 357.062995] [ffffea0002a00000-ffffea0002dfffff] PMD ->
[ffff88007f400000-ffff88007f7fffff] on node 0
[ 357.072594] Hotplug Mem Device
[ 357.119388] init_memory_mapping: 0000000100000000-0000000140000000
[ 357.119388] 0100000000 - 0140000000 page 1G
[ 357.121941] [ffffea0002e00000-ffffea00041fffff] PMD ->
[ffff88007f000000-ffff88007f3fffff] on node 0
[ 357.125199] [ffffea0004200000-ffffea00045fffff] PMD ->
[ffff880087800000-ffff880087bfffff] on node 0
[ 357.128890] [ffffea0004600000-ffffea00049fffff] PMD ->
[ffff880087400000-ffff8800877fffff] on node 0
[ 357.132014] [ffffea0004a00000-ffffea0004dfffff] PMD ->
[ffff880087000000-ffff8800873fffff] on node 0
[ 357.135378] Hotplug Mem Device
[ 357.170010] init_memory_mapping: 0000000140000000-0000000180000000
[ 357.170010] 0140000000 - 0180000000 page 1G
[ 357.170174] [ffffea0004e00000-ffffea00051fffff] PMD ->
[ffff880086c00000-ffff880086ffffff] on node 0
[ 357.172473] [ffffea0005200000-ffffea00055fffff] PMD ->
[ffff880127c00000-ffff880127ffffff] on node 0
[ 357.175795] [ffffea0005600000-ffffea00059fffff] PMD ->
[ffff880127800000-ffff880127bfffff] on node 0
[ 357.180010] [ffffea0005a00000-ffffea0005dfffff] PMD ->
[ffff880127400000-ffff8801277fffff] on node 0
[ 357.195142] Hotplug Mem Device
[ 357.195409] init_memory_mapping: 0000000180000000-00000001c0000000
[ 357.195409] 0180000000 - 01c0000000 page 1G
[ 357.197770] [ffffea0005e00000-ffffea00061fffff] PMD ->
[ffff880127000000-ffff8801273fffff] on node 0
[ 357.199525] [ffffea0006200000-ffffea00063fffff] PMD ->
[ffff880137e00000-ffff880137ffffff] on node 0
[ 357.202982] [ffffea0006400000-ffffea00067fffff] PMD ->
[ffff880137800000-ffff880137bfffff] on node 0
[ 357.206225] [ffffea0006800000-ffffea0006bfffff] PMD ->
[ffff880137400000-ffff8801377fffff] on node 0
[ 357.210314] Hotplug Mem Device
[ 357.280089] init_memory_mapping: 00000001c0000000-0000000200000000
[ 357.280089] 01c0000000 - 0200000000 page 1G
[ 357.280295] [ffffea0006c00000-ffffea0006ffffff] PMD ->
[ffff880137000000-ffff8801373fffff] on node 0
[ 357.280898] [ffffea0007000000-ffffea00073fffff] PMD ->
[ffff8801b7c00000-ffff8801b7ffffff] on node 0
[ 357.284138] [ffffea0007400000-ffffea00077fffff] PMD ->
[ffff8801b7800000-ffff8801b7bfffff] on node 0
[ 357.290084] [ffffea0007800000-ffffea0007bfffff] PMD ->
[ffff8801b7400000-ffff8801b77fffff] on node 0
Stefan
----- Mail original -----
De: "Stefan Priebe" <[email protected]>
À: [email protected]
Envoyé: Vendredi 14 Février 2014 21:18:47
Objet: [pve-devel] CPU and Memory hot add
Hi,
while browsing the web, i found profitbricks, which is active in germany
and the us (http://www.profitbricks.com/technical-info).
They use KVM and offer memory and cpu hot add on the fly? Anybody an
idea how this works if kvm does not already support it?
Greets,
Stefan
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