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authorLuca Boccassi <luca.boccassi@gmail.com>2018-11-27 10:44:39 +0000
committerLuca Boccassi <luca.boccassi@gmail.com>2018-11-27 10:45:47 +0000
commita4f0fa29488e582ab8b5ef9db475b3d26ded690c (patch)
treede163f35a726d518a3f93ab6ee4ac25b8982635d /doc/guides/rel_notes/known_issues.rst
parent29058550643267a554e0368806dece63b047c5cb (diff)
New upstream version 18.11upstream/18.11upstream
Change-Id: I6c63198045de1e34fda8a7b4665d89d5f4a20d20 Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Diffstat (limited to 'doc/guides/rel_notes/known_issues.rst')
-rw-r--r--doc/guides/rel_notes/known_issues.rst67
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diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst
index 95e4ce69..a1face9c 100644
--- a/doc/guides/rel_notes/known_issues.rst
+++ b/doc/guides/rel_notes/known_issues.rst
@@ -759,3 +759,70 @@ Netvsc driver and application restart
**Driver/Module**:
``uio_hv_generic`` module.
+
+
+PHY link up fails when rebinding i40e NICs to kernel driver
+-----------------------------------------------------------
+
+**Description**:
+ Some kernel drivers are not able to handle the link status correctly
+ after DPDK application sets the PHY to link down.
+
+**Implication**:
+ The link status can't be set to "up" after the NIC is rebound to the
+ kernel driver. Before a DPDK application quits it will invoke the
+ function ``i40e_dev_stop()`` which will sets the PHY to link down. Some
+ kernel drivers may not be able to handle the link status correctly after
+ it retakes control of the device. This is a known PHY link configuration
+ issue in the i40e kernel driver. The fix has been addressed in the 2.7.4 rc
+ version. So if the i40e kernel driver is < 2.7.4 and doesn't have the
+ fix backported it will encounter this issue.
+
+**Resolution/Workaround**:
+ First try to remove and reinsert the i40e kernel driver. If that fails
+ reboot the system.
+
+**Affected Environment/Platform**:
+ All.
+
+**Driver/Module**:
+ Poll Mode Driver (PMD).
+
+
+Restricted vdev ethdev operations supported in secondary process
+----------------------------------------------------------------
+**Description**
+ In current virtual device sharing model, Ethernet device data structure will be
+ shared between primary and secondary process. Only those Ethernet device operations
+ which based on it are workable in secondary process.
+
+**Implication**
+ Some Ethernet device operations like device start/stop will be failed on virtual
+ device in secondary process.
+
+**Affected Environment/Platform**:
+ ALL.
+
+**Driver/Module**:
+ Virtual Device Poll Mode Driver (PMD).
+
+
+Kernel crash when hot-unplug igb_uio device while DPDK application is running
+-----------------------------------------------------------------------------
+
+**Description**:
+ When device has been bound to igb_uio driver and application is running,
+ hot-unplugging the device may cause kernel crash.
+
+**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.
+
+**Resolution/Workaround**:
+ If using DPDK for PCI HW hot-unplug, prefer to bind device with VFIO instead of IGB_UIO.
+
+**Affected Environment/Platform**:
+ ALL.
+
+**Driver/Module**:
+ ``igb_uio`` module.