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 and potential
workarounds.
Signed-off-by: Ciara Loftus <ciara.lof...@intel.com>
---
INSTALL.DPDK.md | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/INSTALL.DPDK.md b/INSTALL.DPDK.md
index 02588c4..96b686c 100644
--- a/INSTALL.DPDK.md
+++ b/INSTALL.DPDK.md
@@ -891,6 +891,18 @@ 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 either to use a version of QEMU
+ between v2.2.0 and v2.3.1 (inclusive), or alternatively, to apply the
+ following patch to DPDK and rebuild:
+ http://dpdk.org/dev/patchwork/patch/7736/
+ This problem will likely be resolved in Open vSwitch at a later date, when
+ the next release of DPDK (which includes the above patch) is available and
+ integrated into OVS.
+
Bug Reporting:
--------------
--
1.9.3
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