--- Begin Message ---
Package: qemu-system-x86
Version: 1:2.1+dfsg-12+deb8u6
Severity: normal
Dear Maintainer,
Qemu-KVM Memory allocations > 16GB don't work right.
I don't know exactly where this bug resides (qemu-system-x86, qemu-kvm,
seabios???)
Any configuration > 16GB lead to an unpopulated final DIMM slot and incorrect
memory count
Asked For Got
--------- ---
2GB 2GB
4GB 4GB
8GB 8GB
16GB 16GB*
32GB 16GB
64GB 48GB
128GB 112GB
*Special case, asking for 16GB gets 16GB but DMI claims the singular DIMM slot
on the system is EMPTY?!?!?
The QEMU running command in this special case is:
qemu-system-x86 -enable-kvm -name testing -S -machine
pc-q35-2.1,accel=kvm,usb=off -cpu
Broadwell,+invtsc,+abm,+pdpe1gb,+rdrand,+f16c,+osxsave,+dca,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme
-m 16384 -realtime mlock=off -smp 8,sockets=8,cores=1,threads=1 -uuid
834c942a-e29e-40df-b6eb-e5288cc62e7c -no-user-config -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/testing.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew
-global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global
PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot
order=c,menu=on,strict=on -device
i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1e -device
pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x1 -device
virtio-serial-pci,id=virtio-serial0,bus=pci.2,addr=0x4 -drive
file=/VMDATA/Disk_Images/testing-os.img,if=none,id=drive-virtio-disk0,format=raw
-device virtio-blk-pci,scsi=off!
,bus=pci.2,addr=0x2,drive=drive-virtio-disk0,id=virtio-disk0 -netdev
tap,fd=24,id=hostnet0,vhost=on,vhostfd=25 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:fb:d3:c2,bus=pci.2,addr=0x3
-chardev spicevmc,id=charchannel0,name=vdagent -device
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0
-spice port=5900,addr=127.0.0.1,seamless-migration=on -device
qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pcie.0,addr=0x1
-device virtio-balloon-pci,id=balloon0,bus=pci.2,addr=0x1 -device
pvpanic,ioport=1285 -msg timestamp=on
specifically with '-m 16384'. Other configurations below just alter the '-m'
option (and nothing else)
----------
++ specify 2GB (2048MB) current/max and get:
# dmidecode -t memory | grep -e 'Maximum Capacity' -e 'Number Of Devices'
Maximum Capacity: 2 GB
Number Of Devices: 1
# dmidecode -t memory | sed -ne '/Memory Device/,/Part Number/ { /Size:/h;
/^[[:space:]]*Locator:/ {p;x;p}; /Speed:/p}' | paste - - - | tr -s '\t' |
expand -t 1,20,50
Locator: DIMM 0 Size: 2048 MB Speed: Unknown
----------
++ specify 4GB (4096MB) current/max and get:
ocean:~# dmidecode -t memory | grep -e 'Maximum Capacity' -e 'Number Of Devices'
Maximum Capacity: 4 GB
Number Of Devices: 1
ocean:~# dmidecode -t memory | sed -ne '/Memory Device/,/Part Number/ {
/Size:/h; /^[[:space:]]*Locator:/ {p;x;p}; /Speed:/p}' | paste - - - | tr -s
'\t' | expand -t 1,20,50
Locator: DIMM 0 Size: 4096 MB Speed: Unknown
----------
++ specify 8GB (8192MB) current/max and get:
ocean:~# dmidecode -t memory | grep -e 'Maximum Capacity' -e 'Number Of Devices'
Maximum Capacity: 8 GB
Number Of Devices: 1
ocean:~# dmidecode -t memory | sed -ne '/Memory Device/,/Part Number/ {
/Size:/h; /^[[:space:]]*Locator:/ {p;x;p}; /Speed:/p}' | paste - - - | tr -s
'\t' | expand -t 1,20,50
Locator: DIMM 0 Size: 8192 MB Speed: Unknown
----------
++ specify 16GB (16384) current/max and get:
ocean:~# dmidecode -t memory | grep -e 'Maximum Capacity' -e 'Number Of Devices'
Maximum Capacity: 16 GB
Number Of Devices: 1
ocean:~# dmidecode -t memory | sed -ne '/Memory Device/,/Part Number/ {
/Size:/h; /^[[:space:]]*Locator:/ {p;x;p}; /Speed:/p}' | paste - - - | tr -s
'\t' | expand -t 1,20,50
Locator: DIMM 0 Size: No Module Installed Speed: Unknown
----------
++ specify 32GB (32768MB) current/max and get:
# dmidecode -t memory | grep -e 'Maximum Capacity' -e 'Number Of Devices'
Maximum Capacity: 32 GB
Number Of Devices: 2
# dmidecode -t memory | sed -ne '/Memory Device/,/Part Number/ { /Size:/h;
/^[[:space:]]*Locator:/ {p;x;p}; /Speed:/p}' | paste - - - | tr -s '\t' |
expand -t 1,20,50
Locator: DIMM 0 Size: 16384 MB Speed: Unknown
Locator: DIMM 1 Size: No Module Installed Speed: Unknown
----------
++ specify 64GB (65536MB) current/max and get:
# dmidecode -t memory | grep -e 'Maximum Capacity' -e 'Number Of Devices'
Maximum Capacity: 64 GB
Number Of Devices: 4
# dmidecode -t memory | sed -ne '/Memory Device/,/Part Number/ { /Size:/h;
/^[[:space:]]*Locator:/ {p;x;p}; /Speed:/p}' | paste - - - | tr -s '\t' |
expand -t 1,20,50
Locator: DIMM 0 Size: 16384 MB Speed: Unknown
Locator: DIMM 1 Size: 16384 MB Speed: Unknown
Locator: DIMM 2 Size: 16384 MB Speed: Unknown
Locator: DIMM 3 Size: No Module Installed Speed: Unknown
----------
++ specify 128GB (131072MB) current/max and get:
# dmidecode -t memory | grep -e 'Maximum Capacity' -e 'Number Of Devices'
Maximum Capacity: 128 GB
Number Of Devices: 8
# dmidecode -t memory | sed -ne '/Memory Device/,/Part Number/ { /Size:/h;
/^[[:space:]]*Locator:/ {p;x;p}; /Speed:/p}' | paste - - - | tr -s '\t' |
expand -t 1,20,50
Locator: DIMM 0 Size: 16384 MB Speed: Unknown
Locator: DIMM 1 Size: 16384 MB Speed: Unknown
Locator: DIMM 2 Size: 16384 MB Speed: Unknown
Locator: DIMM 3 Size: 16384 MB Speed: Unknown
Locator: DIMM 4 Size: 16384 MB Speed: Unknown
Locator: DIMM 5 Size: 16384 MB Speed: Unknown
Locator: DIMM 6 Size: 16384 MB Speed: Unknown
Locator: DIMM 7 Size: No Module Installed Speed: Unknown
----------
++ Specify 131074MB (128GB + 2MB) current/max and get:
(testing if we add just a "bit" more memory than what we want.
# dmidecode -t memory | grep -e 'Maximum Capacity' -e 'Number Of Devices'
Maximum Capacity: 131074 MB
Number Of Devices: 9
# dmidecode -t memory | sed -ne '/Memory Device/,/Part Number/ { /Size:/h;
/^[[:space:]]*Locator:/ {p;x;p}; /Speed:/p}' | paste - - - | tr -s '\t' |
expand -t 1,20,50
Locator: DIMM 0 Size: 16384 MB Speed: Unknown
Locator: DIMM 1 Size: 16384 MB Speed: Unknown
Locator: DIMM 2 Size: 16384 MB Speed: Unknown
Locator: DIMM 3 Size: 16384 MB Speed: Unknown
Locator: DIMM 4 Size: 16384 MB Speed: Unknown
Locator: DIMM 5 Size: 16384 MB Speed: Unknown
Locator: DIMM 6 Size: 16384 MB Speed: Unknown
Locator: DIMM 7 Size: 16384 MB Speed: Unknown
Locator: DIMM 8 Size: 2 MB Speed: Unknown
-- System Information:
Debian Release: 8.7
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.16.0-4-amd64 (SMP w/56 CPU cores)
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages qemu-system-x86 depends on:
ii ipxe-qemu 1.0.0+git-20141004.86285d1-1
ii libaio1 0.3.110-1
ii libasound2 1.0.28-1
ii libbluetooth3 5.23-2+b1
ii libbrlapi0.6 5.2~20141018-5
ii libc6 2.19-18+deb8u7
ii libcurl3-gnutls 7.38.0-4+deb8u5
ii libfdt1 1.4.0+dfsg-1
ii libgcc1 1:4.9.2-10
ii libglib2.0-0 2.42.1-1+b1
ii libgnutls-deb0-28 3.3.8-6+deb8u4
ii libiscsi2 1.12.0-2
ii libjpeg62-turbo 1:1.3.1-12
ii libncurses5 5.9+20140913-1+b1
ii libpixman-1-0 0.32.6-3
ii libpng12-0 1.2.50-2+deb8u3
ii libpulse0 5.0-13
ii librados2 0.80.7-2+deb8u2
ii librbd1 0.80.7-2+deb8u2
ii libsasl2-2 2.1.26.dfsg1-13+deb8u1
ii libsdl1.2debian 1.2.15-10+b1
ii libseccomp2 2.1.1-1
ii libspice-server1 0.12.5-1+deb8u4
ii libssh2-1 1.4.3-4.1+deb8u1
ii libtinfo5 5.9+20140913-1+b1
ii libusb-1.0-0 2:1.0.19-1
ii libusbredirparser1 0.7-1
ii libuuid1 2.25.2-6
ii libvdeplug2 2.3.2+r586-1
ii libx11-6 2:1.6.2-3
ii libxen-4.4 4.4.1-9+deb8u8
ii libxenstore3.0 4.4.1-9+deb8u8
ii qemu-system-common 1:2.1+dfsg-12+deb8u6
ii seabios 1.7.5-1
ii zlib1g 1:1.2.8.dfsg-2+b1
Versions of packages qemu-system-x86 recommends:
ii qemu-utils 1:2.1+dfsg-12+deb8u6
Versions of packages qemu-system-x86 suggests:
ii kmod 18-3
pn ovmf <none>
pn samba <none>
pn sgabios <none>
pn vde2 <none>
-- no debconf information
--- End Message ---
