linux-kernel - [PATCH 0/2][GIT PULL] tracing/filters: adjustements for strings

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Date:	Sun,  3 May 2009 03:50:31 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Tom Zanussi <tzanussi@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Li Zefan <lizf@...fujitsu.com>,
	Zhaolei <zhaolei@...fujitsu.com>
Subject: [PATCH 0/2][GIT PULL] tracing/filters: adjustements for strings

Hi,

The following patchset includes two little peas of features
for tracing filters, making them able to filter every kind of strings.

Now I can do this:

cd /debug/tracing
echo > trace
echo stacktrace > trace_options

cd events/lockdep
echo 'name == "&REISERFS_SB(s)->lock" && wait_usec > 0' > lock_acquired/filter

echo 1 > lock_acquired/enable
sleep 1
echo 0 > lock_acquired/enable

cat trace

 # tracer: nop
 #
 #           TASK-PID    CPU#    TIMESTAMP  FUNCTION
 #              | |       |          |         |
           <...>-6464  [000]   327.448232: lock_acquired: &REISERFS_SB(s)->lock (25058.984 us)
           <...>-6464  [000]   327.448233: 
 <= reiserfs_get_block
 <= __block_prepare_write
 <= block_write_begin
 <= reiserfs_write_begin
 <= generic_file_buffered_write
 <= __generic_file_aio_write_nolock
 <= generic_file_aio_write
           <...>-6470  [000]   327.448422: lock_acquired: &REISERFS_SB(s)->lock (25112.702 us)
           <...>-6470  [000]   327.448425: 
 <= reiserfs_update_sd_size
 <= reiserfs_write_end
 <= generic_file_buffered_write
 <= __generic_file_aio_write_nolock
 <= generic_file_aio_write
 <= do_sync_write
 <= reiserfs_file_write


Tom, your filter framework is awesome and very useful!
Thanks :-)

Frederic.
---

The following changes since commit a0e39ed378fb6ba916522764cd508fa7d42ad495:
  Heiko Carstens (1):
        tracing: fix build failure on s390

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git tracing/filters

Frederic Weisbecker (2):
      tracing/filters: support for filters of dynamic sized arrays
      tracing/filters: support for operator reserved characters in strings

 kernel/trace/trace_events_filter.c |   54 ++++++++++++++++++++++++++++++++++--
 1 files changed, 51 insertions(+), 3 deletions(-)
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