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| author | Zheng Yejian <zhengyejian1@huawei.com> | 2022-10-17 13:38:06 +0300 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2022-10-19 00:41:56 +0300 |
| commit | a635beeacc6d56d2b71c39e6c0103f85b53d108e (patch) | |
| tree | ac0ce7ac2b41cd4dcd9a7d12c01a60ff73ad7904 /Documentation | |
| parent | 9abf2313adc1ca1b6180c508c25f22f9395cc780 (diff) | |
| download | linux-a635beeacc6d56d2b71c39e6c0103f85b53d108e.tar.xz | |
tracing/histogram: Update document for KEYS_MAX size
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>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/trace/histogram.rst | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/trace/histogram.rst b/Documentation/trace/histogram.rst index c1b685a38f6b..87bd772836c0 100644 --- 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. |