Messages in this thread | | | Date | Tue, 17 Feb 2009 00:12:27 -0500 | From | Steven Rostedt <> | Subject | [PATCH 00/15] [git pull] for tip/tracing/ftrace |
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Ingo,
This is a patch series that offers a variety of features.
The first is to add:
#### all functions enabled ####
to set_ftrace_filter when all functions will be traced when function tracing is on.
The next is to add a :command: interface, and the module command:
echo '*:mod:ext4' > set_ftrace_filter
Will select all functions in the ext4 module.
echo '!*write*:mod:ext4' > set_ftrace_filter
will remove all functions with the characters 'write' and are in ext4.
Next we extend the :command: interface as well as add a way to hook tracers to specific functions. Instead of tracing all functions the same, this patch series adds a hash to be able to trace different functions differently.
I implement a 'traceon' and 'traceoff' to have a function start or stop tracing when it is hit. It also includes a counter for the number of times to implement the trace on/off.
echo '*_lock:traceon:4' > set_ftrace_filter echo '*_unlock:traceoff:5' > set_ftrace_filter
This will have all functions that end with _lock turn on tracing and all that end with _unlock disable it, 4 times each.
The following patches are in:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace.git
branch: tip/tracing/ftrace
Steven Rostedt (15): ftrace: state that all functions are enabled in set_ftrace_filter ftrace: add do_for_each_ftrace_rec and while_for_each_ftrace_rec ftrace: rename ftrace_match to ftrace_match_records ftrace: break up ftrace_match_records into smaller components ftrace: add module command function filter selection ftrace: enable filtering only when a function is filtered on ftrace: add command interface for function selection ftrace: convert ftrace_lock from a spinlock to mutex ftrace: consolidate mutexes ftrace: trace different functions with a different tracer ring-buffer: add tracing_is_on to test if ring buffer is enabled ftrace: add traceon traceoff commands to enable/disable the buffers ftrace: show selected functions in set_ftrace_filter ftrace: add pretty print to selected fuction traces ftrace: add pretty print function for traceon and traceoff hooks
---- include/linux/ftrace.h | 40 ++ include/linux/ring_buffer.h | 2 + kernel/trace/ftrace.c | 929 +++++++++++++++++++++++++++++++--------- kernel/trace/ring_buffer.c | 9 + kernel/trace/trace_functions.c | 163 +++++++ 5 files changed, 946 insertions(+), 197 deletions(-) --
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