Hi Andrey, Andrey Korolyov <andrey@xxxxxxx> writes: > On Mon, Mar 16, 2015 at 10:17 PM, Andrey Korolyov <andrey@xxxxxxx> wrote: >> For now, it looks like bug have a mixed Murphy-Heisenberg nature, as >> it appearance is very rare (compared to the number of actual launches) >> and most probably bounded to the physical characteristics of my >> production nodes. As soon as I reach any reproducible path for a >> regular workstation environment, I`ll let everyone know. Also I am >> starting to think that issue can belong to the particular motherboard >> firmware revision, despite fact that the CPU microcode is the same >> everywhere. I will take the risk and say this - "could it be a processor bug ?" :) > > Hello everyone, I`ve managed to reproduce this issue > *deterministically* with latest seabios with smp fix and 3.18.3. The > error occuring just *once* per vm until hypervisor reboots, at least > in my setup, this is definitely crazy... > > - launch two VMs (Centos 7 in my case), > - wait a little while they are booting, > - attach serial console (I am using virsh list for this exact purpose), > - issue acpi reboot or reset, does not matter, > - VM always hangs at boot, most times with sgabios initialization > string printed out [1], but sometimes it hangs a bit later [2], > - no matter how many times I try to relaunch the QEMU afterwards, the > issue does not appear on VM which experienced problem once; > - trace and sample args can be seen in [3] and [4] respectively. My system is a Dell R720 dual socket which has 2620v2s. I tried your setup but couldn't reproduce (my qemu cmdline isn't exactly the same as yours), although, if you could simplify your command line a bit, I can try again. Bandan > 1) > Google, Inc. > Serial Graphics Adapter 06/11/14 > SGABIOS $Id: sgabios.S 8 2010-04-22 00:03:40Z nlaredo $ > (pbuilder@zorak) Wed Jun 11 05:57:34 UTC 2014 > Term: 211x62 > 4 0 > > 2) > Google, Inc. > Serial Graphics Adapter 06/11/14 > SGABIOS $Id: sgabios.S 8 2010-04-22 00:03:40Z nlaredo $ > (pbuilder@zorak) Wed Jun 11 05:57:34 UTC 2014 > Term: 211x62 > 4 0 > [...empty screen...] > SeaBIOS (version 1.8.1-20150325_230423-testnode) > Machine UUID 3c78721f-7317-4f85-bcbe-f5ad46d293a1 > > > iPXE (http://ipxe.org) 00:02.0 C100 PCI2.10 PnP PMM+3FF95BA0+3FEF5BA0 C10 > > 3) > > KVM internal error. Suberror: 2 > extra data[0]: 800000ef > extra data[1]: 80000b0d > EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000000 > ESI=00000000 EDI=00000000 EBP=00000000 ESP=00006d2c > EIP=0000d331 EFL=00010202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 > ES =0000 00000000 0000ffff 00009300 > CS =f000 000f0000 0000ffff 00009b00 > SS =0000 00000000 0000ffff 00009300 > DS =0000 00000000 0000ffff 00009300 > FS =0000 00000000 0000ffff 00009300 > GS =0000 00000000 0000ffff 00009300 > LDT=0000 00000000 0000ffff 00008200 > TR =0000 00000000 0000ffff 00008b00 > GDT= 000f6cb0 00000037 > IDT= 00000000 000003ff > CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000 > DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 > DR3=0000000000000000 > DR6=00000000ffff0ff0 DR7=0000000000000400 > EFER=0000000000000000 > Code=66 c3 cd 02 cb cd 10 cb cd 13 cb cd 15 cb cd 16 cb cd 18 cb <cd> > 19 cb cd 1c cb cd 4a cb fa fc 66 ba 47 d3 0f 00 e9 ad fe f3 90 f0 0f > ba 2d d4 fe fb 3f > > 4) > /usr/bin/qemu-system-x86_64 -name centos71 -S -machine > pc-i440fx-2.1,accel=kvm,usb=off -cpu SandyBridge,+kvm_pv_eoi -bios > /usr/share/seabios/bios.bin -m 1024 -realtime mlock=off -smp > 12,sockets=1,cores=12,threads=12 -uuid > 3c78721f-7317-4f85-bcbe-f5ad46d293a1 -nographic -no-user-config > -nodefaults -device sga -chardev > socket,id=charmonitor,path=/var/lib/libvirt/qemu/centos71.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 strict=on -device > nec-usb-xhci,id=usb,bus=pci.0,addr=0x3 -device > virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x4 -drive > file=rbd:dev-rack2/centos7-1.raw:id=qemukvm:key=XXXXXXXXXXXXXXXXXXXXXXXXXX:auth_supported=cephx\;none:mon_host=10.6.0.1\:6789\;10.6.0.3\:6789\;10.6.0.4\:6789,if=none,id=drive-virtio-disk0,format=raw,cache=writeback,aio=native > -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 > -chardev pty,id=charserial0 -device > isa-serial,chardev=charserial0,id=serial0 -chardev > socket,id=charchannel0,path=/var/lib/libvirt/qemu/centos71.sock,server,nowait > -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.1 > -msg timestamp=on -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
