X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Fcompressdevs%2Foverview.rst;h=809e4e6e76298349b91c14958210051f650b9552;hb=7194e9ee66d6f229862e9293fed358061fb93daf;hp=ca37de1756aede4766741ad1f1c058f317dfbc78;hpb=5a441543615a6893db7862bbc7d224795ed9ac5e;p=dpdk.git

diff --git a/doc/guides/compressdevs/overview.rst b/doc/guides/compressdevs/overview.rst
index ca37de1756..809e4e6e76 100644
--- a/doc/guides/compressdevs/overview.rst
+++ b/doc/guides/compressdevs/overview.rst
@@ -10,3 +10,23 @@ Supported Feature Flags
 .. _table_compression_pmd_features:
 
 .. include:: overview_feature_table.txt
+
+.. Note::
+
+   - "Pass-through" feature flag refers to the ability of the PMD
+     to let input buffers pass-through it, copying the input to the output,
+     without making any modifications to it (no compression done).
+
+   - "OOP SGL In SGL Out" feature flag stands for
+     "Out-of-place Scatter-gather list Input, Scatter-gather list Output",
+     which means PMD supports different scatter-gather styled input and output buffers
+     (i.e. both can consists of multiple segments).
+
+   - "OOP SGL In LB Out" feature flag stands for
+     "Out-of-place Scatter-gather list Input, Linear Buffers Output",
+     which means PMD supports input from scatter-gathered styled buffers, outputting linear buffers
+     (i.e. single segment).
+
+   - "OOP LB In SGL Out" feature flag stands for
+     "Out-of-place Linear Buffers Input, Scatter-gather list Output",
+     which means PMD supports input from linear buffer, outputting scatter-gathered styled buffers.