Hi, Is this a bug in OVS code? In this case I think we can work on a fix, rather than suggesting to downgrade QEMU.
If this is a bug in DPDK librte_vhost, is there a fix available (on master, or on the mailing list)? Thanks On 29/10/2015 04:50, "Ciara Loftus" <ciara.lof...@intel.com> wrote: >Currently when using QEMU v2.4.0+, two (or more) dpdkvhostuser ports >cannot be unbound from the kernel driver in the guest without causing >the ovs-vswitchd process to crash. Document this limitation. > >Signed-off-by: Ciara Loftus <ciara.lof...@intel.com> >--- > INSTALL.DPDK.md | 10 ++++++++++ > 1 file changed, 10 insertions(+) > >diff --git a/INSTALL.DPDK.md b/INSTALL.DPDK.md >index 7bf110c..01963e9 100644 >--- a/INSTALL.DPDK.md >+++ b/INSTALL.DPDK.md >@@ -891,6 +891,16 @@ Restrictions: > core count of the system to be less than or equal to 64 when using >an XL710 > interface with DPDK. > >+ vHost and QEMU v2.4.0+: >+ - For versions of QEMU v2.4.0 and later, it is currently not possible >to >+ unbind more than one dpdkvhostuser port from the guest kernel driver >without >+ causing the ovs-vswitchd process to crash. If this is a requirement >for your >+ use case, it is recommended to use a version of QEMU between v2.2.0 >and >+ v2.3.1 (inclusive). This problem will likely be resolved in Open >vSwitch at >+ a later date, when the next release of DPDK is available and >integrated. >+ Note: The QEMU commit ID that breaks compatibility is >+ 294ce717e0f212ed0763307f3eab72b4a1bdf4d0. >+ > Bug Reporting: > -------------- > >-- >1.9.3 > >_______________________________________________ >dev mailing list >dev@openvswitch.org >https://urldefense.proofpoint.com/v2/url?u=http-3A__openvswitch.org_mailma >n_listinfo_dev&d=BQIGaQ&c=Sqcl0Ez6M0X8aeM67LKIiDJAXVeAw-YihVMNtXt-uEs&r=Sm >B5nZacmXNq0gKCC1s_Cw5yUNjxgD4v5kJqZ2uWLlE&m=2vLCArpNUJzLbDd2-6RrKoZXJuvAnc >DxVRpVb2KP4zE&s=ubo8WHxMWKfjSZtGY4G9HcmXUMMCGE7FvEk6adAsxQ8&e= _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
