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Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures

From Nicholas Piggin <npiggin@gmail.com>
Newsgroups linux.kernel
Subject Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures
Date 2016-08-04 18:10 +0200
Message-ID <s2t4e-2PF-29@gated-at.bofh.it> (permalink)
References <s1OaK-WW-15@gated-at.bofh.it> <s2onT-7Kf-9@gated-at.bofh.it> <s2pjY-8pF-7@gated-at.bofh.it> <s2pMZ-qc-7@gated-at.bofh.it> <s2q6m-DV-27@gated-at.bofh.it>
Organization IBM

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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

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powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-08-02 22:10 +0200
  Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Guenter Roeck <linux@roeck-us.net> - 2016-08-03 00:00 +0200
    Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-08-03 00:30 +0200
      Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-03 00:50 +0200
      Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Stephen Rothwell <sfr@canb.auug.org.au> - 2016-08-03 02:30 +0200
        Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-03 10:00 +0200
          Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Stephen Rothwell <sfr@canb.auug.org.au> - 2016-08-03 14:30 +0200
            Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-03 14:40 +0200
              Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Nicholas Piggin <npiggin@gmail.com> - 2016-08-03 18:00 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-03 21:10 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-03 22:20 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Segher Boessenkool <segher@kernel.crashing.org> - 2016-08-03 22:50 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Stephen Rothwell <sfr@canb.auug.org.au> - 2016-08-04 02:20 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-04 11:10 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-04 12:50 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Nicholas Piggin <npiggin@gmail.com> - 2016-08-04 13:50 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-04 14:20 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Nicholas Piggin <npiggin@gmail.com> - 2016-08-04 14:40 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-04 17:50 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Nicholas Piggin <npiggin@gmail.com> - 2016-08-04 18:10 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-04 18:20 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Segher Boessenkool <segher@kernel.crashing.org> - 2016-08-04 20:30 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Nicholas Piggin <npiggin@gmail.com> - 2016-08-05 10:50 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-05 12:20 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Nicholas Piggin <npiggin@gmail.com> - 2016-08-05 14:30 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-05 18:10 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Nicholas Piggin <npiggin@gmail.com> - 2016-08-05 18:20 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-05 21:20 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 -  next-20160729 build failures Nicholas Piggin <npiggin@gmail.com> - 2016-08-06 22:50 +0200
                Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Arnd Bergmann <arnd@arndb.de> - 2016-08-06 23:20 +0200
  Re: powerpc allyesconfig / allmodconfig linux-next next-20160729 - next-20160729 build failures Michael Ellerman <mpe@ellerman.id.au> - 2016-08-03 05:30 +0200

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