Add "What's new" section

Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>

diff --git a/contents/preface.md b/contents/preface.md
index 050be73c0eef40eb8d4eba5333c15ee687b9ac6d..d438b60b3e6f90e0353eb36f3e62297b1ae22cf6 100644 (file)
--- a/contents/preface.md
+++ b/contents/preface.md
@@ -27,15 +27,6 @@ user application and library tracing). It is controlled by a session
 daemon, which receives commands from a command line interface.
 
 
-### Version
-
-This online LTTng Documentation is always up-to-date with the most
-recent releases of LTTng packages. Older versions are always available
-as tagged commits in the documentation's
-<a href="https://github.com/lttng/lttng-docs" class="ext">official Git
-repository</a>.
-
-
 ### Convention
 
 Function and argument names, variable names, command names,

diff --git a/contents/whats-new.md b/contents/whats-new.md
new file mode 100644 (file)
index 0000000..7d42d3c
--- /dev/null
+++ b/contents/whats-new.md
@@ -0,0 +1,27 @@
+---
+id: whats-new
+---
+
+Most of the changes of LTTng 2.6 are bug fixes, making the toolchain
+more stable than ever before. Still, LTTng 2.6 adds some interesting
+features.
+
+LTTng 2.5 already supported the instrumentation and tracing of
+[Java applications](#doc-java-application) through `java.util.logging`
+(JUL). LTTng 2.6 goes one step further by supporting
+<a href="https://logging.apache.org/log4j/1.2/" class="ext">Apache log4j 1.2</a>.
+The new log4j domain is selected using the `--log4j` option in various
+commands of the `lttng` tool.
+
+LTTng-modules has supported system call tracing for a long time,
+but until now, it was only possible to record either all of them,
+or none of them. LTTng 2.6 allows the user to record only a specific
+subset of system call events, e.g.:
+
+<pre class="term">
+lttng enable-event --kernel --syscall open,fork,chdir,pipe
+</pre>
+
+Finally, the `lttng` command line tool cannot only communicate with
+humans as it used to do, but also with machines thanks to its new
+[machine interface](#doc-mi) feature.

diff --git a/toc/docs.yml b/toc/docs.yml
index b7c505cd9b4f99a6dc738e322e872c4047f87205..fe9e3f41b5de3dab7ecdcaaba1fb3a921a2ad960 100644 (file)
--- a/toc/docs.yml
+++ b/toc/docs.yml
@@ -1,5 +1,7 @@
 title: The <span class="reset-text-transform">LTTng</span> Documentation
 cats:
+  - id: whats-new
+    title: What's new in LTTng 2.6?
   - id: nuts-and-bolts
     title: Nuts and bolts
   - id: installing-lttng