From: Andi Kleen <andi@firstfloor.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Tim Abbott <tabbott@MIT.EDU>,
andi@firstfloor.org, jbarnold@MIT.EDU,
linux-kernel@vger.kernel.org, vda.linux@googlemail.com,
andersk@MIT.EDU, wdaher@MIT.EDU, knikanth@suse.de
Subject: Re: [PATCH 1/7] Make section names compatible with -ffunction-sections -fdata-sections
Date: Mon, 12 Jan 2009 23:11:03 +0100 [thread overview]
Message-ID: <20090112221103.GJ23848@one.firstfloor.org> (raw)
In-Reply-To: <20090112135127.7a0bb392.akpm@linux-foundation.org>
> So we `make it possible to build the kernel > with "gcc
> -ffunction-sections -fdata-sections"'. So what? Where is the value in
> that?
The original reason was that it allows the linker to drop unused
functions automatically. That is a good thing by itself -- e.g.
if it was universal we could avoid a lot of #ifdefs. And it
also turned out that standard kernel builds get smaller by it iirc.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2009-01-12 21:56 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-06 0:03 [PATCH 0/7] Ksplice: Rebootless kernel updates Jeff Arnold
2008-12-06 0:03 ` [PATCH 1/7] Make section names compatible with -ffunction-sections -fdata-sections Jeff Arnold
2008-12-06 0:03 ` [PATCH 2/7] x86: Add an option to compile " Jeff Arnold
2008-12-06 0:03 ` [PATCH 3/7] Ksplice: Make find_symbol return a struct kernel_symbol Jeff Arnold
2008-12-06 0:03 ` [PATCH 4/7] Ksplice: Add module_data_address (the analogue of module_text_address) Jeff Arnold
2008-12-06 0:03 ` [PATCH 5/7] Ksplice: Add functions for walking kallsyms symbols Jeff Arnold
2008-12-06 0:03 ` [PATCH 6/7] Ksplice: Export symbols needed for Ksplice Jeff Arnold
2008-12-06 0:04 ` [PATCH 7/7] Ksplice: Support updating x86-32 and x86-64 Jeff Arnold
2008-12-17 5:41 ` Theodore Tso
2008-12-18 2:09 ` Tim Abbott
2009-02-07 2:36 ` Rusty Russell
2009-02-10 1:01 ` Tim Abbott
2009-02-04 11:35 ` [PATCH 6/7] Ksplice: Export symbols needed for Ksplice Rusty Russell
2009-02-13 1:46 ` Tim Abbott
2009-02-16 7:11 ` Rusty Russell
2009-02-04 11:30 ` [PATCH 5/7] Ksplice: Add functions for walking kallsyms symbols Rusty Russell
2009-02-04 21:31 ` Anders Kaseorg
2009-02-04 11:21 ` [PATCH 4/7] Ksplice: Add module_data_address (the analogue of module_text_address) Rusty Russell
2009-02-04 20:48 ` Anders Kaseorg
2009-02-07 12:45 ` Rusty Russell
2009-02-04 9:26 ` [PATCH 3/7] Ksplice: Make find_symbol return a struct kernel_symbol Rusty Russell
2009-02-04 8:38 ` [PATCH 2/7] x86: Add an option to compile with -ffunction-sections -fdata-sections Rusty Russell
2009-02-04 10:26 ` Anders Kaseorg
2009-02-04 10:58 ` Rusty Russell
2009-02-04 20:50 ` Anders Kaseorg
2008-12-06 8:46 ` [PATCH 1/7] Make section names compatible " Andi Kleen
2008-12-31 19:18 ` Tim Abbott
2008-12-31 19:52 ` Andi Kleen
2008-12-31 21:59 ` Tim Abbott
2009-01-01 16:32 ` Andrew Morton
2009-01-04 19:20 ` Tim Abbott
2009-01-12 21:51 ` Andrew Morton
2009-01-12 22:11 ` Andi Kleen [this message]
2009-02-04 8:15 ` Rusty Russell
2009-02-05 1:11 ` Anders Kaseorg
2009-02-05 2:00 ` Anders Kaseorg
2008-12-17 2:48 ` [PATCH 0/7] Ksplice: Rebootless kernel updates Tim Abbott
2008-12-17 3:07 ` Andrew Morton
2008-12-17 3:53 ` Dave Jones
2008-12-17 17:19 ` Jeff Arnold
2008-12-17 5:05 ` Tim Abbott
2008-12-17 12:09 ` Ben Collins
2008-12-17 12:06 ` Ben Collins
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