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[Qemu-devel] [Bug 1685242] Re: ovmf hangs at efi with virtio-net memory

From: flumm
Subject: [Qemu-devel] [Bug 1685242] Re: ovmf hangs at efi with virtio-net memory hotplug
Date: Wed, 20 Feb 2019 09:05:53 -0000

i see,

but is there a good reason why it did work with an older qemu version/machine 
type (<= 2.6)
also my cpuinfo says physical bits 39 but i cannot use more maxmem than 222G

i attached the cpuinfo, cmdline, and debug logs for a nonworking invocation and
one for each working, with 222G, with machine type 2.6 and without a virtio-net 

** Attachment added: "/proc/cpuinfo"

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  ovmf hangs at efi with virtio-net memory hotplug

Status in QEMU:

Bug description:
  with qemu 2.9 it hangs at the efi stage when memory-hotplug is enabled
  and it has a virtio-net devices

  the ovmf images where compiled from https://github.com/tianocore/edk2
  (current master)


  qemu-system-x86_64 -drive
  'if=pflash,unit=0,format=raw,readonly,file=./OVMF_CODE.fd' -drive
  'if=pflash,unit=1,format=raw,file=./my_OVMF_VARS.fd' -smp 1 -vga std
  -netdev 'type=tap,id=mynet' -device 'virtio-net-pci,netdev=mynet'
  -display sdl -nodefaults -m 'size=1G,slots=256,maxmem=1024G'

  interestingly, it works when you do the following:

  - omit the virtio-net-pci device
  - use seabios
  - use less maxmem, e.g. 512G

  qemu was compiled from source (v2.9.0) with following options:

  ./configure --target-list=x86_64-softmmu --disable-xen --enable-gnutls 
--enable-sdl --enable-linux-aio --enable-rbd --enable-libiscsi 
--disable-smartcard --audio-drv-list="alsa" --enable
  -spice --enable-usb-redir --enable-glusterfs --enable-libusb --disable-gtk 
--enable-xfsctl --enable-numa --disable-strip --enable-jemalloc --enable-virtfs 
--disable-libnfs --disable-fdt --disable-guest-agent --disable-guest-agent-msi

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