X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Fprog_guide%2Fmulti_proc_support.rst;h=a84083b96c8afdc0b062c8933403cb79d5140b70;hb=08b1d50543dea1a9e817f67f4b97ea22347e2a09;hp=63d08b60900da654d3a2c0b81d44e7aa16a3d8c7;hpb=3855b4150037142435b5c1f4195e44c142785f1f;p=dpdk.git

diff --git a/doc/guides/prog_guide/multi_proc_support.rst b/doc/guides/prog_guide/multi_proc_support.rst
index 63d08b6090..a84083b96c 100644
--- a/doc/guides/prog_guide/multi_proc_support.rst
+++ b/doc/guides/prog_guide/multi_proc_support.rst
@@ -309,6 +309,13 @@ If a response is required, a new ``rte_mp_msg`` message descriptor must be
 constructed and sent via ``rte_mp_reply()`` function, along with ``peer``
 pointer. The resulting response will then be delivered to the correct requestor.
 
+.. warning::
+    Simply returning a value when processing a request callback will not send a
+    response to the request - it must always be explicitly sent even in case
+    of errors. Implementation of error signalling rests with the application,
+    there is no built-in way to indicate success or error for a request. Failing
+    to do so will cause the requestor to time out while waiting on a response.
+
 Misc considerations
 ~~~~~~~~~~~~~~~~~~~~~~~~