On Osage boards, the implementation of the ``rte_delay_us()`` function must be changed to not use the HPET timer.
**Resolution/Workaround**:
- This can be addressed by building the system with the ``CONFIG_RTE_LIBEAL_USE_HPET=n``
- configuration option or by using the ``--no-hpet`` EAL option.
+ This can be addressed by building the system with ``RTE_LIBEAL_USE_HPET`` unset
+ or by using the ``--no-hpet`` EAL option.
**Affected Environment/Platform**:
The Osage customer reference platform.
work correctly, provided the BIOS supports HPET.
**Driver/Module**:
- ``lib/librte_eal/common/include/rte_cycles.h``
+ ``lib/eal/include/rte_cycles.h``
Not all variants of supported NIC types have been used in testing
------------------------------------------------------------------------------------------
**Description**:
- A known bug in the uio driver included in Linux kernel version 3.9 prevents more than one PCI device to be
+ A known bug in the UIO driver included in Linux kernel version 3.9 prevents more than one PCI device to be
bound to the igb_uio driver.
**Implication**:
Poll Mode Driver (PMD).
-uio pci generic module bind failed in X710/XL710/XXV710
+uio_pci_generic module bind failed in X710/XL710/XXV710
-------------------------------------------------------
**Description**:
Poll Mode Driver (PMD).
-igb uio legacy mode can not be used in X710/XL710/XXV710
+igb_uio legacy mode can not be used in X710/XL710/XXV710
--------------------------------------------------------
**Description**:
handshake sequence with the host.
**Resolution/Workaround**:
- Either reboot the guest or remove and reinsert the hv_uio_generic module.
+ Either reboot the guest or remove and reinsert the uio_hv_generic module.
**Affected Environment/Platform**:
Linux Hyper-V.
**Reason**:
When device is hot-unplugged, igb_uio driver will be removed which will destroy UIO resources.
- Later trying to access any uio resource will cause kernel crash.
+ Later trying to access any UIO resource will cause kernel crash.
**Resolution/Workaround**:
If using DPDK for PCI HW hot-unplug, prefer to bind device with VFIO instead of IGB_UIO.
**Description**:
``AVX-512`` support has been disabled on some conditions.
- This shouldn't be confused with ``CONFIG_RTE_ENABLE_AVX512`` config option which is already
- disabled by default. This config option defines if ``AVX-512`` specific implementations of
- some file to be used or not. What has been disabled is compiler feature to produce ``AVX-512``
- instructions from any source code.
On DPDK v18.11 ``AVX-512`` is disabled for all ``GCC`` builds which reported to cause a performance
drop.
**Driver/Module**:
ALL.
+
+Vhost multi-queue reconnection failed with QEMU version >= 4.2.0
+----------------------------------------------------------------
+
+**Description**
+ It's a QEMU regression bug (bad commit: c6beefd674ff). QEMU only saves
+ acked features for one vhost-net when vhost quits. When vhost reconnects
+ to virtio-net/virtio-pmd in multi-queue situations, the features been
+ set multiple times are not consistent.
+
+**Implication**
+ Vhost cannot reconnect back to virtio-net/virtio-pmd normally.
+
+**Resolution/Workaround**:
+ It is possible to filter the incorrect acked features at vhost-user side.
+
+**Affected Environment/Platform**:
+ ALL.
+
+**Driver/Module**:
+ Virtual Device Poll Mode Driver (PMD).