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Description of problem: host hang after 2 kvm_VM whole night netperffing Version-Release number of selected component (if applicable): kernel-2.6.32-220.el6.x86_64 qemu-kvm-0.12.1.2-2.212.el6.x86_64 How reproducible: met it twice Steps to Reproduce: 1.boot 2 Linux guests, guest_A as netserver and guest_B as netperf client. 2.keep netperffing from guest_B to guest_A,here I am using '-t TCP_STREAM' 3.run for a long time, I tried a whole night,and host hangs Actual results: 1) host hangs,cannot ssh to it, keyboard / screen didn't response. 2) but still able to reply ICMP ping. 3) kdump service is up and running but didn't capture the vmcore Expected results: both host and guest works well. Additional info: full cmd: qemu-kvm -monitor stdio -chardev socket,id=serial_id_20111221-141330-hqg4,path=/tmp/serial-20111221-141330-hqg4,server,nowait -device isa-serial,chardev=serial_id_20111221-141330-hqg4 -drive file=RHEL-Server-6.1-64-virtio.qcow2,index=0,if=none,id=drive-virtio-disk1,media=disk,cache=none,snapshot=on,format=qcow2,aio=native -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk1,id=virtio-disk1 -device virtio-net-pci,netdev=idHoAlJ5,mac=9a:eb:f5:d1:2a:9a,id=ndev00idHoAlJ5,bus=pci.0,addr=0x3 -netdev tap,id=idHoAlJ5,vhost=on,fd=20 -m 2048 -smp 2,cores=1,threads=1,sockets=2 -cpu cpu64-rhel6,+sse2,+x2apic -spice port=8001,disable-ticketing -vga qxl -rtc base=utc,clock=host,driftfix=slew -boot order=cdn,once=c,menu=off -no-kvm-pit-reinjection -M rhel6.2.0 -usb -device usb-tablet -enable-kvm # brctl show bridge name bridge id STP enabled interfaces switch 8000.00221927543b no eth0 t0-141330-hqg4 t0-183357-PUXj Host info: cpu : processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 67 model name : Dual-Core AMD Opteron(tm) Processor 1216 stepping : 3 cpu MHz : 1000.000 cache size : 1024 KB 8G RAM
Can you please set up a serial console to get the message (or netconsole) from the host? Better disable STP regardless of the issue. Can you also test w/ Intel cpu?
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
(In reply to comment #2) > Can you please set up a serial console to get the message (or netconsole) from > the host? OK, will do. > > Better disable STP regardless of the issue. STP is disabled. bridge name bridge id STP enabled interfaces switch 8000.00221927543b no eth0 > Can you also test w/ Intel cpu? OK, will do. Regards, Xiaoqing Wei.
(In reply to comment #2) > Can you please set up a serial console to get the message (or netconsole) from > the host? > Test on the same host, didn't hang forever this time, only hang for a few mins and back, during the test, collected some dmesg, will attach a txt file. > Better disable STP regardless of the issue. > Can you also test w/ Intel cpu? tried a intel host, after 24 hours running, didn't hang(but I am not sure if this bug is amd only, because it didn't 100% reproducible on the orig host.) Xiaoqing Wei.
Created attachment 549471 [details] dmesg