From: Zheng Yejian zhengyejian1@huawei.com
commit a635beeacc6d56d2b71c39e6c0103f85b53d108e upstream.
After commit 4f36c2d85ced ("tracing: Increase tracing map KEYS_MAX size"), 'keys' supports up to three fields.
Signed-off-by: Zheng Yejian zhengyejian1@huawei.com Cc: stable@vger.kernel.org Acked-by: Masami Hiramatsu (Google) mhiramat@kernel.org Link: https://lore.kernel.org/r/20221017103806.2479139-1-zhengyejian1@huawei.com Signed-off-by: Jonathan Corbet corbet@lwn.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- Documentation/trace/histogram.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/Documentation/trace/histogram.rst +++ b/Documentation/trace/histogram.rst @@ -39,7 +39,7 @@ Documentation written by Tom Zanussi will use the event's kernel stacktrace as the key. The keywords 'keys' or 'key' can be used to specify keys, and the keywords 'values', 'vals', or 'val' can be used to specify values. Compound - keys consisting of up to two fields can be specified by the 'keys' + keys consisting of up to three fields can be specified by the 'keys' keyword. Hashing a compound key produces a unique entry in the table for each unique combination of component keys, and can be useful for providing more fine-grained summaries of event data.