apport information ** Tags added: apport-collected precise third-party-packages
** Description changed: Hi Everyone, The significant performance degradation in ubuntu 12.04 in work with 9p file system. It is working only for a couple of hours under intesive read/write operations. after this all operations stops. The system required complete shutdown of qemu and restarting it. the bug is qemu because the host is working well and other virtual machines connected to the same folder works without any problems. In my case this problem is reproducible: 3 times in a raw. guest:~$ uname -a Linux biouml-1 3.2.0-19-virtual #30-Ubuntu SMP Fri Mar 16 18:07:13 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux host:~$ uname -a Linux s0 3.2.0-19-generic #30-Ubuntu SMP Fri Mar 16 16:27:15 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux kvm --version QEMU emulator version 1.0 (qemu-kvm-1.0), Copyright (c) 2003-2008 Fabrice Bellard VirtFS on /srv/shared type 9p (rw,trans=virtio,version=9p2000.L) $ ps aux| grep kvm - one-52 -uuid 50994459-9e97-b488-2893-b4a75a65c559 -nodefconfig - -nodefaults -chardev - socket,id=charmonitor,path=/var/lib/libvirt/qemu/one-52.monitor,server,nowait - -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no- - shutdown -drive file=/var/lib/one/var//52/images/disk.0,if=none,id - =drive-virtio-disk0,format=raw,cache=writeback -device virtio-blk- - pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio- - disk0,bootindex=1 -drive - file=/var/lib/one/var//52/images/disk.1,if=none,id=drive-virtio- - disk4,format=raw,cache=writeback -device virtio-blk- - pci,bus=pci.0,addr=0x6,drive=drive-virtio-disk4,id=virtio-disk4 -fsdev - local,security_model=mapped,id=fsdev-fs0,path=/tank/biouml-shared - -device virtio-9p-pci,id=fs0,fsdev=fsdev- - fs0,mount_tag=VirtFS,bus=pci.0,addr=0x3 -netdev tap,fd=18,id=hostnet0 - -device virtio-net- - pci,netdev=hostnet0,id=net0,mac=02:00:c0:a8:02:1e,bus=pci.0,addr=0x4 - -usb -device usb-mouse,id=input0 -vnc 0.0.0.0:52 -vga cirrus -device - virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -cpu host + one-52 -uuid 50994459-9e97-b488-2893-b4a75a65c559 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/one-52.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -drive file=/var/lib/one/var//52/images/disk.0,if=none,id=drive-virtio-disk0,format=raw,cache=writeback -device virtio-blk-pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=/var/lib/one/var//52/images/disk.1,if=none,id=drive-virtio-disk4,format=raw,cache=writeback -device virtio-blk-pci,bus=pci.0,addr=0x6,drive=drive-virtio-disk4,id=virtio-disk4 -fsdev local,security_model=mapped,id=fsdev-fs0,path=/tank/biouml-shared -device virtio-9p-pci,id=fs0,fsdev=fsdev-fs0,mount_tag=VirtFS,bus=pci.0,addr=0x3 -netdev tap,fd=18,id=hostnet0 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=02:00:c0:a8:02:1e,bus=pci.0,addr=0x4 -usb -device usb-mouse,id=input0 -vnc 0.0.0.0:52 -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -cpu host + --- + ApportVersion: 2.0-0ubuntu2 + Architecture: amd64 + DistroRelease: Ubuntu 12.04 + InstallationMedia: Ubuntu-Server 11.10 "Oneiric Ocelot" - Release amd64 (20111011) + MachineType: Supermicro H8QG6 + NonfreeKernelModules: zfs zcommon znvpair zavl zunicode + Package: qemu-kvm 1.0+noroms-0ubuntu10 [origin: Ubuntu] + PackageArchitecture: amd64 + ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-21-generic root=UUID=39e3c519-7ef2-44ea-af9f-60f5328337f2 ro + ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13 + Tags: precise third-party-packages + Uname: Linux 3.2.0-21-generic x86_64 + UnreportableReason: This is not an official Ubuntu package. Please remove any third party package and try again. + UpgradeStatus: Upgraded to precise on 2012-03-15 (18 days ago) + UserGroups: adm admin cdrom dialout kvm libvirtd lpadmin plugdev sambashare + dmi.bios.date: 10/28/2011 + dmi.bios.vendor: American Megatrends Inc. + dmi.bios.version: 2.0a + dmi.board.asset.tag: 1234567890 + dmi.board.name: H8QG6 + dmi.board.vendor: Supermicro + dmi.board.version: 1234567890 + dmi.chassis.asset.tag: 1234567890 + dmi.chassis.type: 17 + dmi.chassis.vendor: Supermicro + dmi.chassis.version: 1234567890 + dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2.0a:bd10/28/2011:svnSupermicro:pnH8QG6:pvr1234567890:rvnSupermicro:rnH8QG6:rvr1234567890:cvnSupermicro:ct17:cvr1234567890: + dmi.product.name: H8QG6 + dmi.product.version: 1234567890 + dmi.sys.vendor: Supermicro ** Attachment added: "BootDmesg.txt" https://bugs.launchpad.net/bugs/960923/+attachment/2993236/+files/BootDmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/960923 Title: 9p virtual file system on qemu unstable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/960923/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
