trace2: write to directory targets

diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index 2de565fa3d5a15c4a7179d73b112cd83de0beb09..d0948ba250933ed7e5c3f06bdf70cb7a1e6e5814 100644 (file)
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -109,6 +109,11 @@ values are recognized.
 
        Enables the target, opens and writes to the file in append mode.
 
+       If the target already exists and is a directory, the traces will be
+       written to files (one per process) underneath the given directory. They
+       will be named according to the last component of the SID (optionally
+       followed by a counter to avoid filename collisions).
+
 `af_unix:[<socket_type>:]<absolute-pathname>`::
 
        Enables the target, opens and writes to a Unix Domain Socket