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[RFC,tracing,4/4] tracing: document > 8 byte numeric filtering support

Message ID 1659910883-18223-5-git-send-email-alan.maguire@oracle.com
State New
Headers show
Series tracing: support > 8 byte filter predicates | expand

Commit Message

Alan Maguire Aug. 7, 2022, 10:21 p.m. UTC 
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(+)
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Patch

diff --git a/Documentation/trace/events.rst b/Documentation/trace/events.rst
index c47f381d0c00..318dba2fe3ee 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:
 
 ==, !=, ~