Messages in this thread | | | Date | Wed, 26 Nov 2008 03:14:50 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] tracing/function-return-tracer: set a more human readable output |
| |
the regex filter doesnt work well yet when used with the graph tracer:
[ 2994.079079] ------------[ cut here ]------------ [ 2994.079079] WARNING: at kernel/trace/ftrace.c:373 ftrace_bug+0x8c/0x1ce() [ 2994.079079] Modules linked in: [ 2994.079079] Pid: 12, comm: kstop/0 Not tainted 2.6.28-rc6-tip #2056 [ 2994.079079] Call Trace: [ 2994.079079] [<c02273dd>] warn_on_slowpath+0x46/0x60 [ 2994.079079] [<c0268308>] ? trace_graph_return+0x89/0xa7 [ 2994.079079] [<c0268308>] ? trace_graph_return+0x89/0xa7 [ 2994.079079] [<c0213e85>] ? ftrace_return_to_handler+0x6b/0x74 [ 2994.079079] [<c0357f66>] ? memcpy+0xe/0x31 [ 2994.079079] [<c02633e6>] ? rb_commit+0x29/0x2d [ 2994.079079] [<c0264c8b>] ? ring_buffer_unlock_commit+0x15/0x1a [ 2994.079079] [<c0213ece>] ? ftrace_modify_code+0x21/0xa3 [ 2994.079079] [<c0213e85>] ? ftrace_return_to_handler+0x6b/0x74 [ 2994.079079] [<c026c3ce>] ? probe_kernel_read+0xe/0x5c [ 2994.079079] [<c0261ec7>] ? trace_selftest_dynamic_test_func+0x3/0xc [ 2994.079079] [<c0203926>] ? return_to_handler+0xa/0x14 [ 2994.079079] [<c0261ec7>] ? trace_selftest_dynamic_test_func+0x3/0xc [ 2994.079079] [<c0213ee5>] ? ftrace_modify_code+0x38/0xa3 [ 2994.079079] [<c0261ec7>] ? trace_selftest_dynamic_test_func+0x3/0xc [ 2994.079079] [<c0262749>] ftrace_bug+0x8c/0x1ce [ 2994.079079] [<c026299c>] ftrace_replace_code+0x111/0x13d [ 2994.079079] [<c0253b53>] ? stop_cpu+0x0/0xa5 [ 2994.079079] [<c02629e6>] __ftrace_modify_code+0x1e/0x32 [ 2994.079079] [<c0253bbe>] stop_cpu+0x6b/0xa5 [ 2994.079079] [<c020391c>] return_to_handler+0x0/0x14 [ 2994.079079] [<c020391c>] return_to_handler+0x0/0x14 [ 2994.079079] [<c0237fc1>] ? autoremove_wake_function+0x0/0x35 [ 2994.079079] [<c023584b>] ? worker_thread+0x0/0xc7 [ 2994.079079] [<c0237eba>] kthread+0x40/0x66 [ 2994.079079] [<c0237e7a>] ? kthread+0x0/0x66 [ 2994.079079] [<c02038cb>] kernel_thread_helper+0x7/0x10 [ 2994.079079] ---[ end trace bff97d149b80ecde ]--- [ 2994.079079] ftrace failed to modify [<c0261ec7>] trace_selftest_dynamic_test_func+0x3/0xc [ 2994.079079] actual: e8:0c:1a:fa:ff
produced via:
# cd /debug/tracing/ # cat set_ftrace_filter # echo schedule > set_ftrace_filter # cat set_ftrace_filter cat: set_ftrace_filter: No such device
Ingo
| |