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=="add", 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
>> _______________________________________________
>> pve-devel mailing list
>> [email protected]
>> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
>>
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