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. 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. 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
