From: "H. Peter Anvin" <hpa@zytor.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Michal Marek <mmarek@suse.cz>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Frederic Weisbecker <fweisbec@gmail.com>,
Andi Kleen <andi@firstfloor.org>
Subject: Re: [RFC PATCH 3/4] ftrace: Do not test frame pointers if -mfentry is used
Date: Wed, 08 Aug 2012 21:15:36 -0700 [thread overview]
Message-ID: <50233968.4090805@zytor.com> (raw)
In-Reply-To: <CA+55aFyVb5FE1t5zj7WJR3c=3PnCjwNd=UgC5eFdn5eV5PsEZw@mail.gmail.com>
On 08/08/2012 08:45 PM, Linus Torvalds wrote:
>
> Btw, it might be lovely to consider the concept of "Kconfig variables
> set by shell-scripts".
>
> We currently have a metric sh*t-ton of Makefile magic for testing
> various things like this, and integrating it into Kconfig might be a
> good idea. That way you would be able to use the Kconfig logic on
> these things.
>
> Kconfig already has the "option env=XYZ" syntax for importing values
> from the environment variables. Extending it to some kind of "option
> shell=xyz" would allow for more complex interactions like this
> (imagine testing compiler options and version dependencies in the
> Kconfig files instead of the Makefiles)?
>
This is a Frequently Requested Feature over on the kbuild list... and it
almost certainly would speed up the build given how many times the tests
are currently run. Furthermore, it would let us base rules on the
support existing, which we currently can't.
-hpa
next prev parent reply other threads:[~2012-08-09 4:16 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-07 19:38 [RFC PATCH 0/4] ftrace: Add use of -mfentry for x86_64 Steven Rostedt
2012-08-07 19:38 ` [RFC PATCH 1/4] ftrace: Make recordmcount.c handle __fentry__ Steven Rostedt
2012-08-07 23:57 ` John Reiser
2012-08-08 0:05 ` Steven Rostedt
2012-08-27 17:03 ` [tip:perf/core] " tip-bot for Steven Rostedt
2012-08-07 19:38 ` [RFC PATCH 2/4] ftrace: Add -mfentry to Makefile on function tracer Steven Rostedt
2012-08-27 17:04 ` [tip:perf/core] " tip-bot for Steven Rostedt
2012-08-07 19:38 ` [RFC PATCH 3/4] ftrace: Do not test frame pointers if -mfentry is used Steven Rostedt
2012-08-08 4:34 ` Masami Hiramatsu
2012-08-08 12:49 ` Steven Rostedt
2012-08-09 2:58 ` Masami Hiramatsu
2012-08-09 3:45 ` Linus Torvalds
2012-08-09 3:57 ` Steven Rostedt
2012-08-09 4:15 ` H. Peter Anvin [this message]
2012-08-09 12:37 ` Andi Kleen
2012-08-27 17:05 ` [tip:perf/core] " tip-bot for Steven Rostedt
2012-08-07 19:38 ` [RFC PATCH 4/4] ftrace/x86: Add support for -mfentry to x86_64 Steven Rostedt
2012-08-09 8:34 ` Masami Hiramatsu
2012-08-09 13:46 ` Steven Rostedt
2012-08-09 13:48 ` Steven Rostedt
2012-08-10 7:45 ` Masami Hiramatsu
2012-08-27 17:06 ` [tip:perf/core] " tip-bot for Steven Rostedt
2012-08-07 20:23 ` [RFC PATCH 0/4] ftrace: Add use of -mfentry for x86_64 H. Peter Anvin
2012-08-13 8:42 ` Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2011-02-09 20:02 [RFC][PATCH 0/4] ftrace: Use -mfentry when supported (this is for x86_64 right now) Steven Rostedt
2011-02-09 20:02 ` [RFC][PATCH 3/4] ftrace: Do not test frame pointers if -mfentry is used Steven Rostedt
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=50233968.4090805@zytor.com \
--to=hpa@zytor.com \
--cc=akpm@linux-foundation.org \
--cc=andi@firstfloor.org \
--cc=fweisbec@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=masami.hiramatsu.pt@hitachi.com \
--cc=mingo@elte.hu \
--cc=mmarek@suse.cz \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.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.