From: Steven Rostedt <rostedt@goodmis.org>
To: Colin Cross <ccross@android.com>
Cc: "Luck, Tony" <tony.luck@intel.com>,
Anton Vorontsov <anton.vorontsov@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kees Cook <keescook@chromium.org>,
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 18:42:32 -0400 [thread overview]
Message-ID: <1339800152.25903.27.camel@gandalf.stny.rr.com> (raw)
In-Reply-To: <CAMbhsRTGs8G2Fnvy4jcN=kvuM+gA+Md4UuxOZOQYvASjsNOUBQ@mail.gmail.com>
On Fri, 2012-06-15 at 15:23 -0700, Colin Cross wrote:
> The decode also converts PCs to symbols, so for all the data to be
> useful you have to boot the exact same kernel. You could
> theoretically boot a different kernel with a compatible format, but
> you would have to manually extract the PCs from the dump and addr2line
> them against the correct vmlinux, which is probably more trouble than
> it's worth. Also, the binary data is stored inside a pstore_ram
> ringbuffer that may change formats between kernels. I would suggest
> documenting that this is only supposed to work booting back to the
> same kernel.
OK, I'm fine with this too, if it is well documented that the same
kernel must be used. Make it similar to hibernating the box. That is,
you don't want to boot into a different kernel after you shutdown by
hibernating to the hard drive.
-- Steve
next prev parent reply other threads:[~2012-06-15 22:42 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 [this message]
2012-06-15 22:28 ` Steven Rostedt
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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