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
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