Commit a635beea authored by Zheng Yejian's avatar Zheng Yejian Committed by Jonathan Corbet
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tracing/histogram: Update document for KEYS_MAX size 



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>
parent 9abf2313

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.