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Commit 4bc52ddf authored by Zheng Yejian's avatar Zheng Yejian Committed by Greg Kroah-Hartman
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tracing/histogram: Update document for KEYS_MAX size 



commit a635beeacc6d56d2b71c39e6c0103f85b53d108e upstream.

After commit 4f36c2d8 ("tracing: Increase tracing map KEYS_MAX size"),
'keys' supports up to three fields.

Signed-off-by: default avatarZheng Yejian <zhengyejian1@huawei.com>
Cc: stable@vger.kernel.org
Acked-by: default avatarMasami Hiramatsu (Google) <mhiramat@kernel.org>
Link: https://lore.kernel.org/r/20221017103806.2479139-1-zhengyejian1@huawei.com


Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent c8938263

Documentation/trace/histogram.rst

+1 −1
Original line number Diff line number Diff line
@@ -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.