From: Ingo Molnar <mingo@elte.hu>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] tracing/function-return-tracer: set a more human readable output
Date: Wed, 26 Nov 2008 03:14:50 +0100 [thread overview]
Message-ID: <20081126021450.GA17617@elte.hu> (raw)
In-Reply-To: <20081126003936.GA26937@elte.hu>
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
next prev parent reply other threads:[~2008-11-26 2:15 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-25 23:57 [PATCH] tracing/function-return-tracer: set a more human readable output Frederic Weisbecker
2008-11-26 0:39 ` Ingo Molnar
2008-11-26 2:04 ` Ingo Molnar
2008-11-26 2:10 ` [PATCH] tracing: function graph tracer, fix Ingo Molnar
2008-11-26 2:19 ` [PATCH] tracing/function-return-tracer: set a more human readable output Steven Rostedt
2008-11-26 11:32 ` Frédéric Weisbecker
2008-11-26 12:21 ` Steven Rostedt
2008-11-26 13:22 ` Frédéric Weisbecker
2008-11-26 11:11 ` Frédéric Weisbecker
2008-11-26 17:09 ` Steven Rostedt
2008-11-26 2:12 ` Ingo Molnar
2008-11-26 11:11 ` Frédéric Weisbecker
2008-11-26 2:14 ` Ingo Molnar [this message]
2008-11-26 2:21 ` Steven Rostedt
2008-11-26 2:42 ` Ingo Molnar
2008-11-26 2:51 ` Steven Rostedt
2008-11-26 11:19 ` Frédéric Weisbecker
2008-11-26 11:38 ` Ingo Molnar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20081126021450.GA17617@elte.hu \
--to=mingo@elte.hu \
--cc=fweisbec@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=rostedt@goodmis.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.