From: Steven Rostedt <rostedt@goodmis.org>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Anton Vorontsov <anton.vorontsov@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kees Cook <keescook@chromium.org>,
Colin Cross <ccross@android.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@redhat.com>, Arnd Bergmann <arnd@arndb.de>,
John Stultz <john.stultz@linaro.org>,
Shuah Khan <shuahkhan@gmail.com>,
"arve@android.com" <arve@android.com>,
Rebecca Schultz Zavin <rebecca@android.com>,
Jesper Juhl <jj@chaosbits.net>,
Randy Dunlap <rdunlap@xenotime.net>,
Stephen Boyd <sboyd@codeaurora.org>,
Thomas Meyer <thomas@m3y3r.de>,
Andrew Morton <akpm@linux-foundation.org>,
Marco Stornelli <marco.stornelli@gmail.com>,
WANG Cong <xiyou.wangcong@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>,
"linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>,
"patches@linaro.org" <patches@linaro.org>,
"kernel-team@android.com" <kernel-team@android.com>
Subject: RE: [PATCH 3/6] pstore: Add persistent function tracing
Date: Fri, 15 Jun 2012 18:28:30 -0400 [thread overview]
Message-ID: <1339799310.25903.23.camel@gandalf.stny.rr.com> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F19320CC9@ORSMSX104.amr.corp.intel.com>
On Fri, 2012-06-15 at 22:19 +0000, Luck, Tony wrote:
> Binary makes sense too - but I'll stick with my comment that a different
> kernel must be able to do the decode. Or we need to spell out clearly
> that you must have the same, or compatible kernel booted to make any
> sense of the saved ftrace record.
I 100% agree here. I haven't looked at how the data gets stored, but it
should definitely be consistent across kernels.
Maybe store metadata in the persistent storage that explains how to
parse the binary data? Similar to /debug/tracing/events/ftrace/function/format
is done.
-- Steve
next prev parent reply other threads:[~2012-06-15 22:28 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-15 17:07 [PATCH v2 0/6] Function tracing support for pstore Anton Vorontsov
2012-06-15 17:08 ` [PATCH 1/6] tracing: Fix initialization failure path in tracing_set_tracer() Anton Vorontsov
2012-06-15 22:00 ` Steven Rostedt
2012-06-15 17:08 ` [PATCH 2/6] pstore: Introduce write_buf backend callback Anton Vorontsov
2012-06-15 17:08 ` [PATCH 3/6] pstore: Add persistent function tracing Anton Vorontsov
2012-06-15 21:40 ` Luck, Tony
2012-06-15 21:55 ` Steven Rostedt
2012-06-15 22:00 ` Luck, Tony
2012-06-15 22:09 ` Colin Cross
2012-06-15 22:10 ` Steven Rostedt
2012-06-15 22:19 ` Luck, Tony
2012-06-15 22:23 ` Colin Cross
2012-06-15 22:37 ` Luck, Tony
2012-06-15 22:42 ` Steven Rostedt
2012-06-15 22:28 ` Steven Rostedt [this message]
2012-06-15 17:08 ` [PATCH 4/6] tracing/function: Introduce persistent trace option Anton Vorontsov
2012-06-15 17:08 ` [PATCH 5/6] pstore/ram: Convert to write_buf callback Anton Vorontsov
2012-06-15 17:08 ` [PATCH 6/6] pstore/ram: Add ftrace messages handling Anton Vorontsov
2012-06-15 21:28 ` [PATCH v2 0/6] Function tracing support for pstore Greg Kroah-Hartman
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