Mem-hotplug » История » Версия 6
Андрей Волков, 2016-08-12 18:51
| 1 | 1 | Андрей Волков | h1. Добавление памяти (ACPI) |
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| 3 | 5 | Андрей Волков | h2. Требования: |
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| 5 | - qemu-2.1+ |
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| 6 | 6 | Андрей Волков | - guest kernel-3.2+ |
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| 8 | <pre> |
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| 9 | CONFIG_MEMORY_HOTPLUG=y |
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| 10 | CONFIG_ACPI_HOTPLUG_MEMORY=y |
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| 11 | CONFIG_HOTPLUG_PCI=y |
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| 12 | CONFIG_HOTPLUG_PCI_ACPI=y |
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| 13 | </pre> |
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| 14 | |||
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| 16 | 5 | Андрей Волков | |
| 17 | 2 | Андрей Волков | h2. На хосте |
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| 19 | 1 | Андрей Волков | *qmp-shell -H /run/qemu/qemu5521.control.sock* |
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| 21 | <pre> |
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| 22 | (QEMU) info memory-devices |
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| 23 | (QEMU) object_add memory-backend-ram,id=mem1,size=2G |
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| 24 | (QEMU) device_add pc-dimm,id=dimm1,memdev=mem1 |
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| 25 | (QEMU) info memory-devices |
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| 26 | Memory device [dimm]: "dimm1" |
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| 27 | addr: 0x2c0000000 |
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| 28 | slot: 0 |
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| 29 | node: 0 |
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| 30 | size: 2147483648 |
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| 31 | memdev: /objects/mem1 |
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| 32 | hotplugged: true |
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| 33 | hotpluggable: true |
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| 34 | 2 | Андрей Волков | </pre> |
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| 36 | h2. На госте |
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| 37 | 5 | Андрей Волков | |
| 38 | В папке */sys/devices/system/memory* лежат куски памяти по 128Мб |
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| 39 | Только такими кусками можно добавлять память в систему. |
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| 40 | 2 | Андрей Волков | |
| 41 | <pre> |
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| 42 | for NAME in $(grep -l offline /sys/devices/system/memory/memory*/state); do echo online > $NAME; done |
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| 43 | 1 | Андрей Волков | </pre> |
| 44 | 3 | Андрей Волков | |
| 45 | 4 | Андрей Волков | h2. Полезные ссылки |
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| 47 | 3 | Андрей Волков | https://github.com/qemu/qemu/blob/master/docs/memory-hotplug.txt |
| 48 | https://medium.com/@juergen_thomann/memory-hotplug-with-qemu-kvm-and-libvirt-558f1c635972#.eenrv1jdb |