linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Nicholas Piggin <npiggin@gmail.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>,
	Nicolas Pitre <nico@linaro.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"Luis R. Rodriguez" <mcgrof@kernel.org>,
	linux-next@vger.kernel.org, Paul Mackerras <paulus@samba.org>,
	Fengguang Wu <fengguang.wu@intel.com>,
	linuxppc-dev@lists.ozlabs.org, Guenter Roeck <linux@roeck-us.net>
Subject: Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures
Date: Thu, 4 Aug 2016 23:54:18 +1000	[thread overview]
Message-ID: <20160804235418.1f235f55@roar.ozlabs.ibm.com> (raw)
In-Reply-To: <20160804223139.0196b3aa@roar.ozlabs.ibm.com>

On Thu, 4 Aug 2016 22:31:39 +1000
Nicholas Piggin <npiggin@gmail.com> wrote:
> On Thu, 04 Aug 2016 14:09:02 +0200
> Arnd Bergmann <arnd@arndb.de> wrote:
> > Nicolas Pitre has done some related work, adding him to Cc. IIRC we have
> > actually had multiple implementations of -ffunction-sections/--gc-sections
> > in the past that people have used in production, but none of them
> > ever made it upstream.  

After some googling around it seems lto has been difficult to
get in and it was agreed this gc-sections should be done first
anyway (although it may indeed provide a superset of DCE, but
it's always going to be more costly and complicated). Lto would
have the same issue with liveness of entry points, which is
really the only thing you need change in the kernel as far as I
can see.

I didn't really see what problems people were having with it
though, so maybe it's architecture specific or something I
haven't run into yet.

Thanks,
Nick

  reply	other threads:[~2016-08-04 16:09 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-02 20:07 powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Luis R. Rodriguez
2016-08-02 21:58 ` Guenter Roeck
2016-08-02 22:02   ` Luis R. Rodriguez
2016-08-02 22:34     ` Arnd Bergmann
2016-08-03  0:23     ` Stephen Rothwell
2016-08-03  7:52       ` Arnd Bergmann
2016-08-03 12:19         ` Stephen Rothwell
2016-08-03 12:29           ` Arnd Bergmann
2016-08-03 15:37             ` Nicholas Piggin
2016-08-03 18:52               ` Arnd Bergmann
2016-08-03 19:44                 ` Segher Boessenkool
2016-08-03 20:13                   ` Arnd Bergmann
2016-08-11 12:43                     ` Nicholas Piggin
2016-08-11 13:04                       ` Arnd Bergmann
2016-08-11 13:12                         ` Nicholas Piggin
2016-08-11 13:49                           ` [TESTING] kbuild: link drivers subdirectories separately Arnd Bergmann
2016-08-11 15:46                             ` Arnd Bergmann
2016-08-04  0:10                 ` powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Stephen Rothwell
2016-08-04  9:00                   ` Arnd Bergmann
2016-08-04 10:37                     ` Arnd Bergmann
2016-08-04 11:47                       ` Nicholas Piggin
2016-08-04 12:09                         ` Arnd Bergmann
2016-08-04 12:31                           ` Nicholas Piggin
2016-08-04 13:54                             ` Nicholas Piggin [this message]
2016-08-04 15:43                               ` Arnd Bergmann
2016-08-04 16:10                         ` Arnd Bergmann
2016-08-04 17:06                           ` Segher Boessenkool
2016-08-05  8:41                             ` Nicholas Piggin
2016-08-05 10:17                               ` Arnd Bergmann
2016-08-05 12:26                                 ` Nicholas Piggin
2016-08-05 16:01                                   ` Arnd Bergmann
2016-08-05 16:16                                     ` Nicholas Piggin
2016-08-05 19:16                                       ` Arnd Bergmann
2016-08-06  4:17                                         ` Nicholas Piggin
2016-08-06 21:13                                           ` Arnd Bergmann
2016-08-03  2:46 ` Michael Ellerman

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=20160804235418.1f235f55@roar.ozlabs.ibm.com \
    --to=npiggin@gmail.com \
    --cc=arnd@arndb.de \
    --cc=fengguang.wu@intel.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-next@vger.kernel.org \
    --cc=linux@roeck-us.net \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=mcgrof@kernel.org \
    --cc=nico@linaro.org \
    --cc=paulus@samba.org \
    --cc=sfr@canb.auug.org.au \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).