[PATCH v11 05/24] perf config: Document 'buildid.dir' variable in man page

From: Taeung Song
Date: Tue Nov 17 2015 - 13:42:37 EST

Explain 'buildid.dir' variable.

Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Taeung Song <treeze.taeung@xxxxxxxxx>
tools/perf/Documentation/perf-config.txt | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
index ec30229..b4ee205 100644
--- a/tools/perf/Documentation/perf-config.txt
+++ b/tools/perf/Documentation/perf-config.txt
@@ -151,6 +151,21 @@ tui.*, gtk.*::
By setting value, TUI or GTK can be enabled or not. But it is needed
that perf detects the required library for them during build.

+ buildid.dir::
+ Each executable and shared library in modern distributions comes with a
+ content based identifier that, if available, will be inserted in a
+ 'perf.data' file header to, at analysis time find what is needed to do
+ symbol resolution, code annotation, etc.
+ The recording tools also stores a hard link or copy in a per-user
+ directory, $HOME/.debug/, of binaries, shared libraries, /proc/kallsyms
+ and /proc/kcore files to be used at analysis time.
+ The buildid.dir variable can be used to either change this directory
+ cache location, or to disable it altogether. If you want to disable it,
+ set buildid.dir to /dev/null. The default is $HOME/.debug

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