From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Petr Mladek <pmladek@suse.com>,
Stephen Boyd <swboyd@chromium.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, Jiri Olsa <jolsa@kernel.org>,
Alexei Starovoitov <ast@kernel.org>, Jessica Yu <jeyu@kernel.org>,
Evan Green <evgreen@chromium.org>,
Hsin-Yi Wang <hsinyi@chromium.org>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
linux-doc@vger.kernel.org
Subject: Re: [PATCH 5/7] printk: Make %pS and friends print module build ID
Date: Wed, 3 Mar 2021 18:17:01 +0200 [thread overview]
Message-ID: <YD+2fRo4J/ffQF8z@smile.fi.intel.com> (raw)
In-Reply-To: <20210303100012.0e6e4de3@gandalf.local.home>
On Wed, Mar 03, 2021 at 10:00:12AM -0500, Steven Rostedt wrote:
> On Wed, 3 Mar 2021 11:25:58 +0100
> Petr Mladek <pmladek@suse.com> wrote:
>
> > Alternative solution would be to minimize the information, for
> > example, by printing only the modules that appear in the backtrace.
> > But this might be complicated to implement.
>
> It could be a list after the backtrace perhaps, and not part of the
> "modules linked in"?
>
> But then you need a generic way of capturing those modules in the backtrace
> that works for every architecture.
> Honestly, I don't even know what a buildid is, and it is totally useless
> information for myself. What exactly is it used for?
Dunno Stephen's motivation, but build ID is very useful when you do tracing,
then based on ID the decoders can know what exactly was the layout of the
binary and list of (exported) functions, etc.
At least that was my (shallow) experience with perf last time I have tried it.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2021-03-03 19:11 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-01 17:47 [PATCH 0/7] Add build ID to stacktraces Stephen Boyd
2021-03-01 17:47 ` [PATCH 1/7] buildid: Add method to get running kernel's build ID Stephen Boyd
[not found] ` <CAHp75VcCjYm59-BQ0paPDCV97N5mgcq_OAdeixgUDEnAuG2qMg@mail.gmail.com>
[not found] ` <161472770533.1478170.3061709841985494537@swboyd.mtv.corp.google.com>
2021-03-04 0:41 ` Stephen Boyd
2021-03-01 17:47 ` [PATCH 2/7] dump_stack: Add vmlinux build ID to stack traces Stephen Boyd
2021-03-01 17:47 ` [PATCH 3/7] buildid: Add API to parse build ID out of buffer Stephen Boyd
2021-03-01 17:47 ` [PATCH 4/7] module: Parse and stash build ID on insertion Stephen Boyd
2021-03-01 17:47 ` [PATCH 5/7] printk: Make %pS and friends print module build ID Stephen Boyd
2021-03-02 2:43 ` Steven Rostedt
2021-03-02 23:24 ` Stephen Boyd
2021-03-04 17:19 ` Matthew Wilcox
2021-03-04 19:11 ` Stephen Boyd
2021-03-03 2:01 ` Steven Rostedt
2021-03-03 3:00 ` Stephen Boyd
2021-03-03 8:19 ` Andy Shevchenko
2021-03-03 8:56 ` Stephen Boyd
2021-03-03 10:25 ` Petr Mladek
2021-03-03 15:00 ` Steven Rostedt
2021-03-03 16:17 ` Andy Shevchenko [this message]
2021-03-04 0:38 ` Stephen Boyd
2021-03-04 1:19 ` Steven Rostedt
2021-03-04 6:25 ` Stephen Boyd
2021-03-04 1:17 ` Stephen Boyd
2021-03-04 17:00 ` Matthew Wilcox
2021-03-04 19:15 ` Stephen Boyd
2021-03-04 23:11 ` Rasmus Villemoes
2021-03-05 4:21 ` Stephen Boyd
2021-03-01 17:47 ` [PATCH 6/7] buildid: Mark some arguments const Stephen Boyd
2021-03-01 17:47 ` [PATCH 7/7] kdump: Use vmlinux_build_id() to simplify Stephen Boyd
2021-03-02 8:19 ` Baoquan He
2021-03-02 23:21 ` Stephen Boyd
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