qemu 2.1.0 fails to start if number of cores is greater than 1.

[asavah]

qemu (kvm) 2.1.0 (built from sources) fails to start if number of cores is greater than 1.

relevant part of commandline arguments:

/usr/bin/qemu-system-x86_64 -name test3 -S -machine pc-i440fx-2.1,accel=kvm,usb=off -cpu Westmere -m 4096 -realtime mlock=off -smp 1,maxcpus=4,sockets=1,cores=4,threads=1

the error reported is:

qemu-system-x86_64: /home/asavah/pkgbuild/qemu-2.1.0/hw/i386/smbios.c:825: smbios_get_tables: Assertion `smbios_smp_sockets >= 1' failed.
2014-08-05 21:45:35.825+0000: shutting down

however setting 4 sockets with 1 core each allows me to start the machine just fine.

the system is debian wheezy
Linux hostname 3.16.0-hostname2 #2 SMP Mon Aug 4 17:02:16 EEST 2014 x86_64 GNU/Linux

libvirt 1.2.7 (built from sources)

[Andrey Korolyov (xdeller)]

-smp 1,maxcpus=4,sockets=1,cores=4,threads=1

should be

-smp 4,maxcpus=4,sockets=1,cores=4,threads=1

although more human-friendly error is more appropriate there (better than a silent fallback to either 1- or 4- core topology)

[asavah (irherder)]

I forgot to mention that VM was created and managed remotely via virt-manager 0.9.5 from another host.
I used custom cpu topology.

however this config worked fine on qemu 2.0.0 with virt-manager 0.9.5

just tried virt-manager 1.0.1 - it creates the proper argument -smp 4,maxcpus=4,sockets=1,cores=4,threads=1

so this was a virt-manager bug already fixed upstream.

this bug can be closed :)