[dpdk-dev] doc: add known issue about l3fwd-power
Checks
Commit Message
Because of UIO only support one interrupt, when insmod
``igb_uio`` and running l3fwd-power APP, link status
getting doesn't work properly.
Signed-off-by: Qiming Yang <qiming.yang@intel.com>
---
doc/guides/rel_notes/known_issues.rst | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
Comments
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Qiming Yang
> Sent: Friday, May 5, 2017 6:17 AM
> To: dev@dpdk.org
> Cc: De Lara Guarch, Pablo <pablo.de.lara.guarch@intel.com>; Yang, Qiming
> <qiming.yang@intel.com>
> Subject: [dpdk-dev] [PATCH] doc: add known issue about l3fwd-power
>
> Because of UIO only support one interrupt, when insmod ``igb_uio`` and
> running l3fwd-power APP, link status getting doesn't work properly.
>
> Signed-off-by: Qiming Yang <qiming.yang@intel.com>
Acked-by: John McNamara <john.mcnamara@intel.com>
> > Because of UIO only support one interrupt, when insmod ``igb_uio`` and
> > running l3fwd-power APP, link status getting doesn't work properly.
> >
> > Signed-off-by: Qiming Yang <qiming.yang@intel.com>
>
>
> Acked-by: John McNamara <john.mcnamara@intel.com>
Applied, thanks
@@ -721,3 +721,24 @@ igb uio legacy mode can not be used in X710/XL710/XXV710
**Driver/Module**:
Poll Mode Driver (PMD).
+
+
+igb_uio can not be used when running l3fwd-power
+------------------------------------------------
+
+**Description**:
+ Link Status Change(LSC) interrupt and packet receiving interrupt are all enabled in l3fwd-power
+ APP. Because of UIO only support one interrupt, so these two kinds of interrupt need to share
+ one, and the receiving interrupt have the higher priority, so can't get the right link status.
+
+**Implication**:
+ When insmod ``igb_uio`` and running l3fwd-power APP, link status getting doesn't work properly.
+
+**Resolution/Workaround**:
+ Use vfio-pci when LSC and packet receiving interrupt enabled.
+
+**Affected Environment/Platform**:
+ ALL.
+
+**Driver/Module**:
+ ``igb_uio`` module.