From c3e13c7c0605677a2c94957b39157f4501cea9a8 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Mon, 17 Jun 2013 10:59:17 -0400 Subject: tracing: Update documentation on tracepoint glob matching b0f1a59a "tracing/filters: Use a different op for glob match" added glob matching to tracepoint filter strings. It uses the ftrace function tracing glob matching facility that allows for the wild card character (*) to be used at the start and/or end of the matching string. But the documentation still states that the filtering only allows for exact string matches. Cc: Li Zefan Signed-off-by: Steven Rostedt --- Documentation/trace/events.txt | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) (limited to 'Documentation/trace') diff --git a/Documentation/trace/events.txt b/Documentation/trace/events.txt index 41911240c65c..37732a220d33 100644 --- a/Documentation/trace/events.txt +++ b/Documentation/trace/events.txt @@ -187,9 +187,18 @@ The operators available for numeric fields are: And for string fields they are: -==, != +==, !=, ~ -Currently, only exact string matches are supported. +The glob (~) only accepts a wild card character (*) at the start and or +end of the string. For example: + + prev_comm ~ "*sh" + prev_comm ~ "sh*" + prev_comm ~ "*sh*" + +But does not allow for it to be within the string: + + prev_comm ~ "ba*sh" <-- is invalid 5.2 Setting filters ------------------- -- cgit