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authorZheng Yejian <zhengyejian1@huawei.com>2022-10-17 10:38:06 +0000
committerJonathan Corbet <corbet@lwn.net>2022-10-18 15:41:56 -0600
commita635beeacc6d56d2b71c39e6c0103f85b53d108e (patch)
treeac0ce7ac2b41cd4dcd9a7d12c01a60ff73ad7904
parent9abf2313adc1ca1b6180c508c25f22f9395cc780 (diff)
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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>
-rw-r--r--Documentation/trace/histogram.rst2
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.