linux-doc.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Alan Maguire <alan.maguire@oracle.com>
To: rostedt@goodmis.org, mhiramat@kernel.org
Cc: corbet@lwn.net, shuah@kernel.org, linux-kernel@vger.kernel.org,
	linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-kselftest@vger.kernel.org,
	Alan Maguire <alan.maguire@oracle.com>
Subject: [PATCH tracing 3/3] tracing: document > 8 byte numeric filtering support
Date: Tue, 25 Apr 2023 10:16:37 +0100	[thread overview]
Message-ID: <1682414197-13173-4-git-send-email-alan.maguire@oracle.com> (raw)
In-Reply-To: <1682414197-13173-1-git-send-email-alan.maguire@oracle.com>

For values > 8 bytes in size, only == and != filter predicates are
supported; document this.

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
---
 Documentation/trace/events.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/trace/events.rst b/Documentation/trace/events.rst
index f5fcb8e1218f..0142bf59dc4b 100644
--- a/Documentation/trace/events.rst
+++ b/Documentation/trace/events.rst
@@ -186,6 +186,15 @@ The operators available for numeric fields are:
 
 ==, !=, <, <=, >, >=, &
 
+For numeric fields larger than 8 bytes, only
+
+==, !=
+
+...are allowed, and values for comparison must match field size exactly.
+For example, to match the "::1" IPv6 address:
+
+"dst == 0x00000000000000000000000000000001"
+
 And for string fields they are:
 
 ==, !=, ~
-- 
2.31.1


  parent reply	other threads:[~2023-04-25  9:17 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-25  9:16 [PATCH tracing 0/3] tracing: support > 8 byte filter predicates Alan Maguire
2023-04-25  9:16 ` [PATCH tracing 1/3] tracing: support > 8 byte array " Alan Maguire
2023-04-25 10:58   ` kernel test robot
2023-04-28  1:37   ` kernel test robot
2023-04-25  9:16 ` [PATCH tracing 2/3] selftests/ftrace: add test coverage for " Alan Maguire
2023-04-25  9:16 ` Alan Maguire [this message]
2023-04-25 14:32 ` [PATCH tracing 0/3] tracing: support > 8 byte " Masami Hiramatsu
2023-04-25 17:15   ` Alan Maguire
2023-04-25 17:20     ` Steven Rostedt
2023-04-26  8:51       ` Alan Maguire
2023-04-26 14:08         ` Steven Rostedt
2023-04-26 14:12         ` Masami Hiramatsu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1682414197-13173-4-git-send-email-alan.maguire@oracle.com \
    --to=alan.maguire@oracle.com \
    --cc=corbet@lwn.net \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-kselftest@vger.kernel.org \
    --cc=linux-trace-kernel@vger.kernel.org \
    --cc=mhiramat@kernel.org \
    --cc=rostedt@goodmis.org \
    --cc=shuah@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).