From: Dominik Vogt <vogt@linux.vnet.ibm.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>,
Masami Hiramatsu <maasami.hiramatsu.pt@hitachi.com>,
Vojtech Pavlik <vojtech@suse.cz>, Jiri Kosina <jkosina@suse.cz>,
Jiri Slaby <jslaby@suse.cz>,
Andreas Krebbel <krebbel@linux.vnet.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH/RFC 2/3] ftrace: introduce nohotpatch function attribute
Date: Tue, 27 Jan 2015 07:19:42 +0100 [thread overview]
Message-ID: <20150127061941.GA4591@linux.vnet.ibm.com> (raw)
In-Reply-To: <20150126093701.699763dc@gandalf.local.home>
On Mon, Jan 26, 2015 at 09:37:01AM -0500, Steven Rostedt wrote:
> On Mon, 26 Jan 2015 13:54:53 +0100
> Heiko Carstens <heiko.carstens@de.ibm.com> wrote:
> > s390 will use the hotpatch attribute for function tracing, therefore
> > introduce a nohotpatch define, depending on CC_USING_HOTPATCH, and add it
> > to the existing notrace define.
>
> Are the two mutually exclusive? That is, can you have -pg and hotpatch
> together? Reason why I ask is, if you have either -pg or hotpatch, then
> we only need "no_instrument_function" or "hotpatch" in the notrace
> define, not both. But I could be wrong.
While the kernel may use only profiling or hotpatch at the same
time, Gcc is able to generate both for the same function.
Ciao
Dominik ^_^ ^_^
--
Dominik Vogt
IBM Germany
next prev parent reply other threads:[~2015-01-27 6:19 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-26 12:54 [PATCH/RFC 0/3] ftrace: allow arch specific compile options Heiko Carstens
2015-01-26 12:54 ` [PATCH/RFC 1/3] ftrace: allow architectures to specify ftrace " Heiko Carstens
2015-01-26 12:54 ` [PATCH/RFC 2/3] ftrace: introduce nohotpatch function attribute Heiko Carstens
2015-01-26 14:37 ` Steven Rostedt
2015-01-26 15:03 ` Heiko Carstens
2015-01-26 15:22 ` Steven Rostedt
2015-01-26 15:26 ` Heiko Carstens
2015-01-27 6:19 ` Dominik Vogt [this message]
2015-01-27 14:42 ` Steven Rostedt
2015-01-28 5:36 ` Heiko Carstens
2015-01-28 11:57 ` Steven Rostedt
2015-01-28 12:18 ` Heiko Carstens
2015-01-28 12:38 ` Steven Rostedt
2015-01-26 12:54 ` [PATCH/RFC 3/3] s390/ftrace: hotpatch support for function tracing Heiko Carstens
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