From: Masami Hiramatsu Date: Mon, 27 Jun 2011 07:27:51 +0000 (+0900) Subject: perf probe: Support adding probes on offline kernel modules X-Git-Tag: v3.1-rc1~299^2~10^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=14a8fd7ceea6915c613746203d6e9a2bf273f16c;p=pandora-kernel.git perf probe: Support adding probes on offline kernel modules Support adding probes on offline kernel modules. This enables perf-probe to trace kernel-module init functions via perf-probe. If user gives the path of module with -m option, perf-probe expects the module is offline. This feature works with --add, --funcs, and --vars. E.g) # perf probe -m /lib/modules/`uname -r`/kernel/fs/btrfs/btrfs.ko \ -a "extent_io_init:5 extent_state_cache" Add new events: probe:extent_io_init (on extent_io_init:5 with extent_state_cache) probe:extent_io_init_1 (on extent_io_init:5 with extent_state_cache) You can now use it on all perf tools, such as: perf record -e probe:extent_io_init_1 -aR sleep 1 Signed-off-by: Masami Hiramatsu Cc: Peter Zijlstra Cc: Frederic Weisbecker Cc: Paul Mackerras Cc: Ingo Molnar Cc: Arnaldo Carvalho de Melo Link: http://lkml.kernel.org/r/20110627072751.6528.10230.stgit@fedora15 Signed-off-by: Steven Rostedt --- Reading git-diff-tree failed