[dpdk-dev] [PATCH] doc: add known igb_uio device hot-unplug issue

[Jeff Guo <jia.guo@intel.com>]

When device has been bound to igb_uio driver and application is running,
hot-unplugging the device may cause kernel crash.

Signed-off-by: Jeff Guo <jia.guo@intel.com>
---
 doc/guides/rel_notes/known_issues.rst | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst
index 95e4ce6..dfe0565 100644
--- a/doc/guides/rel_notes/known_issues.rst
+++ b/doc/guides/rel_notes/known_issues.rst
@@ -759,3 +759,24 @@ Netvsc driver and application restart
 
 **Driver/Module**:
    ``uio_hv_generic`` module.
+
+
+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.
-- 
2.7.4