fix: tracepoint: Optimize using static_call() (v5.10)

[lttng-modules.git] / README.md

diff --git a/README.md b/README.md
index 9934d2ef35eb3fb6a604d444ce09328e436da01e..be8aa5f89cb8721e3a07bfc12c720bdbd22729d3 100644 (file)
--- a/README.md
+++ b/README.md
@@ -42,18 +42,31 @@ kernel, do:
     sudo depmod -a kernel_version
 
 
+### Kernel built-in support
+
+It is also possible to build these modules as part of a kernel image. Simply
+run the [`scripts/built-in.sh`](scripts/built-in.sh) script with the path to
+your kernel source directory as an argument.  It will symlink the
+lttng-modules directory in the kernel sources and add an include in the kernel
+Makefile.
+
+Then configure your kernel as usual and enable the `CONFIG_LTTNG` option.
+
+
 ### Required kernel config options
 
 Make sure your target kernel has the following config options enabled:
 
-  - `CONFIG_MODULES`: loadable module support
+  - `CONFIG_MODULES`: loadable module support (not strictly required
+     when built into the kernel)
   - `CONFIG_KALLSYMS`: see files in [`wrapper`](wrapper); this is
      necessary until the few required missing symbols are exported to GPL
      modules from mainline
   - `CONFIG_HIGH_RES_TIMERS`: needed for LTTng 2.x clock source
   - `CONFIG_TRACEPOINTS`: kernel tracepoint instrumentation
      (enabled as a side-effect of any of the perf/ftrace/blktrace
-     instrumentation features)
+     instrumentation features).
+  - `CONFIG_KPROBES` (5.7+): use kallsyms for kernel 5.7 and newer.
 
 
 ### Supported (optional) kernel config options
@@ -83,7 +96,7 @@ available from LTTng:
     number and name
 
 
-Using
+Usage
 -----
 
 Use [LTTng-tools](https://lttng.org/download) to control the tracer.