** Tags removed: verification-needed-focal
** Tags added: verification-done-focal
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https://bugs.launchpad.net/bugs/1925008
Title:
no memory hot-plugging in cloud-images
updated kernel:
...
Setting up linux-image-5.4.0-1039-kvm (5.4.0-1039.40) ...
I: /boot/vmlinuz is now a symlink to vmlinuz-5.4.0-1039-kvm
I: /boot/initrd.img is now a symlink to initrd.img-5.4.0-1039-kvm
...
unfortunately the kernel config is still not set:
root@ubuntu:~# grep -i CONFIG_ACPI_HOTPL
root@ubuntu:~# cat /etc/apt/sources.list.d/ubuntu-focal-proposed.list
# Enable Ubuntu proposed archive
deb http://archive.ubuntu.com/ubuntu/ focal-proposed restricted main multiverse
universe
root@ubuntu:~# apt policy linux-image-kvm
linux-image-kvm:
Installed: 5.4.0.1033.31
Candidate: 5.4.0.
installed mentioned kernel version an did a memory hot-plugging test
which was sucessfull
kernel version:
root@ubuntu:/boot# uname -a
Linux ubuntu 5.4.0-1040-kvm #41-Ubuntu SMP Fri May 14 20:43:17 UTC 2021 x86_64
x86_64 x86_64 GNU/Linux
module in kernel configuration is set:
root@ubuntu:/boot# g
apport information
** Tags added: apport-collected focal uec-images
** Description changed:
Memory hot-plugging is not working with public cloud-images. Error with dmesg
shows:
[ 184.544535] acpi PNP0C80:00: Enumeration failure
checking kernel configuration:
root@ubuntu:/boot# uname
apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1925008/+attachment/5489826/+files/CurrentDmesg.txt
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apport information
** Attachment added: "Lspci-vt.txt"
https://bugs.launchpad.net/bugs/1925008/+attachment/5489828/+files/Lspci-vt.txt
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https://bugs.launchpad.net/bugs/19
apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1925008/+attachment/5489827/+files/Lspci.txt
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apport information
** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/1925008/+attachment/5489829/+files/ProcCpuinfoMinimal.txt
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apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1925008/+attachment/5489830/+files/ProcInterrupts.txt
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1925008/+attachment/5489831/+files/ProcModules.txt
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1925008/+attachment/5489833/+files/WifiSyslog.txt
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1925008/+attachment/5489832/+files/UdevDb.txt
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apport information
** Attachment added: "acpidump.txt"
https://bugs.launchpad.net/bugs/1925008/+attachment/5489834/+files/acpidump.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Well for memory hotplug the -m paramter is important. Here is how i started the
VM:
qemu -name myfancyvm -m 1024,slots=255,maxmem=256G...
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qemu -name $
-m 1024,slots=255,maxmem=256G
-M pc-i440fx-2.7
-enable-kvm
-no-user-config
-nodefaults
-rtc base=utc
-object rng-random,filename=/dev/urandom,id=rng0
-device virtio-rng-pci,rng=rng0,max-bytes=1024,period=1000,bus=pci.0,addr=0x3
-netdev
tap,ifname=$,id=hostnet6,vhost=on,vhostf
We tested the kernel release 5.4.0-1040-kvm and it looks much more
better now. Memory gets added automaticly to the system. Also all events
are visible now:
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent
KERNEL[
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