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* Description of problem:
When vhost-net is enabled as a backend on the RHEL6 KVM host, running netperf on the RHEL6 guest (again the host) will make the host panic. If
vhost-net is not loaded, with the same test, the issue doesn't occur.
( the attached rhel6-212-g1.xml is the libvirt XML for the guest,
dmesg.txt is the dmesg from the vmcore collected using kdump )
* Software Versions
a) On the RHEL6 host
kernel-2.6.32-31.el6.x86_64
libvirt-0.8.1-7.el6.x86_64
qemu-kvm-0.12.1.2-2.68.el6.x86_64
b) Kernel version on the RHEL6 guest
kernel-2.6.32-23.el6.x86_64
c) netperf is from
ftp://ftp.netperf.org/netperf/netperf-2.4.5.tar.gz
* The issue is very easy to produce
* To produce
step 1) on the host
#> modprobe vhost-net
#> virsh start rhel6-212-g1
#> netserver
step 2) on the guest
#> netperf -H 192.168.122.1 -l 180 -t TCP_STREAM -c
Additional info:
Comment 4RHEL Program Management
2010-06-11 03:23:19 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release. Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release. This request is not yet committed for
inclusion.
Created attachment 424131[details]
Revert "[net] bridge: make bridge support netpoll"
This patch reverts
commit 460d5c086f08eff12b4c862c9a1c412cda4e8e7e
Author: Amerigo Wang <amwang>
Date: Sat May 22 09:16:06 2010 -0400
[net] bridge: make bridge support netpoll
as it introduced a use-after-free bug on the bridge transmit path that affects all bridge users, regardless of whether netpoll is enabled or not.
Comment 15releng-rhel@redhat.com
2010-11-11 15:40:20 UTC
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.
* Description of problem: When vhost-net is enabled as a backend on the RHEL6 KVM host, running netperf on the RHEL6 guest (again the host) will make the host panic. If vhost-net is not loaded, with the same test, the issue doesn't occur. ( the attached rhel6-212-g1.xml is the libvirt XML for the guest, dmesg.txt is the dmesg from the vmcore collected using kdump ) * Software Versions a) On the RHEL6 host kernel-2.6.32-31.el6.x86_64 libvirt-0.8.1-7.el6.x86_64 qemu-kvm-0.12.1.2-2.68.el6.x86_64 b) Kernel version on the RHEL6 guest kernel-2.6.32-23.el6.x86_64 c) netperf is from ftp://ftp.netperf.org/netperf/netperf-2.4.5.tar.gz * The issue is very easy to produce * To produce step 1) on the host #> modprobe vhost-net #> virsh start rhel6-212-g1 #> netserver step 2) on the guest #> netperf -H 192.168.122.1 -l 180 -t TCP_STREAM -c Additional info: