From 5de9e5fda05b580c036e1fec6e2d8bf78eb2ac9d Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 30 Jul 2019 11:30:37 -0300 Subject: [PATCH] perf config: Document the PERF_CONFIG environment variable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit There was a provision for setting this variable, but not the getenv("PERF_CONFIG") call to set it, as this was fixed in the previous cset, document that it can be used to ask for using an alternative .perfconfig file or to disable reading whatever file exists in the system or home directory, i.e. using: export PERF_CONFIG=/dev/null Cc: Adrian Hunter Cc: Jiri Olsa Cc: Luis Cláudio Gonçalves Cc: Namhyung Kim Cc: Taeung Song Link: https://lkml.kernel.org/n/tip-0u4o967hsk7j0o50zp9ctn89@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-config.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt index e4aa268d2e38..c599623a1f3d 100644 --- a/tools/perf/Documentation/perf-config.txt +++ b/tools/perf/Documentation/perf-config.txt @@ -40,6 +40,10 @@ The '$HOME/.perfconfig' file is used to store a per-user configuration. The file '$(sysconfdir)/perfconfig' can be used to store a system-wide default configuration. +One an disable reading config files by setting the PERF_CONFIG environment +variable to /dev/null, or provide an alternate config file by setting that +variable. + When reading or writing, the values are read from the system and user configuration files by default, and options '--system' and '--user' can be used to tell the command to read from or write to only that location.