From: Michael Ellerman <mpe@ellerman.id.au>
To: Nicholas Piggin <npiggin@gmail.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-kbuild@vger.kernel.org
Subject: Re: [PATCH v2 4/4] powerpc: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selected
Date: Mon, 14 May 2018 12:05:19 +1000 [thread overview]
Message-ID: <87a7t3q9eo.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <20180509130001.24276-5-npiggin@gmail.com>
Nicholas Piggin <npiggin@gmail.com> writes:
> This requires further changes to linker script to KEEP some tables
> and wildcard compiler generated sections into the right place. This
> includes pp32 modifications from Christophe Leroy.
>
> When compiling powernv_defconfig with this option, the resulting
> kernel is almost 400kB smaller (and still boots):
>
> text data bss dec filename
> 11827621 4810490 1341080 17979191 vmlinux
> 11752437 4598858 1338776 17690071 vmlinux.dcde
>
> Mathieu's numbers for custom Mac Mini G4 config has almost 200kB
> saving. It also had some increase in vmlinux size for as-yet
> unknown reasons.
>
> text data bss dec filename
> 7461457 2475122 1428064 11364643 vmlinux
> 7386425 2364370 1425432 11176227 vmlinux.dcde
>
> Tested-by: Christophe Leroy <christophe.leroy@c-s.fr> [8xx]
> Tested-by: Mathieu Malaterre <malat@debian.org> [32-bit powermac]
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
> arch/powerpc/Kconfig | 1 +
> arch/powerpc/kernel/vmlinux.lds.S | 22 +++++++++++-----------
> 2 files changed, 12 insertions(+), 11 deletions(-)
I'm happy for this to go in via the kbuild tree.
As long as it's in linux-next it will get tested by my CI which should
hopefully shake out any bugs.
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
cheers
WARNING: multiple messages have this Message-ID (diff)
From: Michael Ellerman <mpe@ellerman.id.au>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
Nicholas Piggin <npiggin@gmail.com>,
linux-kbuild@vger.kernel.org
Subject: Re: [PATCH v2 4/4] powerpc: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selected
Date: Mon, 14 May 2018 12:05:19 +1000 [thread overview]
Message-ID: <87a7t3q9eo.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <20180509130001.24276-5-npiggin@gmail.com>
Nicholas Piggin <npiggin@gmail.com> writes:
> This requires further changes to linker script to KEEP some tables
> and wildcard compiler generated sections into the right place. This
> includes pp32 modifications from Christophe Leroy.
>
> When compiling powernv_defconfig with this option, the resulting
> kernel is almost 400kB smaller (and still boots):
>
> text data bss dec filename
> 11827621 4810490 1341080 17979191 vmlinux
> 11752437 4598858 1338776 17690071 vmlinux.dcde
>
> Mathieu's numbers for custom Mac Mini G4 config has almost 200kB
> saving. It also had some increase in vmlinux size for as-yet
> unknown reasons.
>
> text data bss dec filename
> 7461457 2475122 1428064 11364643 vmlinux
> 7386425 2364370 1425432 11176227 vmlinux.dcde
>
> Tested-by: Christophe Leroy <christophe.leroy@c-s.fr> [8xx]
> Tested-by: Mathieu Malaterre <malat@debian.org> [32-bit powermac]
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
> arch/powerpc/Kconfig | 1 +
> arch/powerpc/kernel/vmlinux.lds.S | 22 +++++++++++-----------
> 2 files changed, 12 insertions(+), 11 deletions(-)
I'm happy for this to go in via the kbuild tree.
As long as it's in linux-next it will get tested by my CI which should
hopefully shake out any bugs.
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
cheers
WARNING: multiple messages have this Message-ID (diff)
From: Michael Ellerman <mpe@ellerman.id.au>
To: Nicholas Piggin <npiggin@gmail.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
Nicholas Piggin <npiggin@gmail.com>,
linux-kbuild@vger.kernel.org
Subject: Re: [PATCH v2 4/4] powerpc: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selected
Date: Mon, 14 May 2018 12:05:19 +1000 [thread overview]
Message-ID: <87a7t3q9eo.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <20180509130001.24276-5-npiggin@gmail.com>
Nicholas Piggin <npiggin@gmail.com> writes:
> This requires further changes to linker script to KEEP some tables
> and wildcard compiler generated sections into the right place. This
> includes pp32 modifications from Christophe Leroy.
>
> When compiling powernv_defconfig with this option, the resulting
> kernel is almost 400kB smaller (and still boots):
>
> text data bss dec filename
> 11827621 4810490 1341080 17979191 vmlinux
> 11752437 4598858 1338776 17690071 vmlinux.dcde
>
> Mathieu's numbers for custom Mac Mini G4 config has almost 200kB
> saving. It also had some increase in vmlinux size for as-yet
> unknown reasons.
>
> text data bss dec filename
> 7461457 2475122 1428064 11364643 vmlinux
> 7386425 2364370 1425432 11176227 vmlinux.dcde
>
> Tested-by: Christophe Leroy <christophe.leroy@c-s.fr> [8xx]
> Tested-by: Mathieu Malaterre <malat@debian.org> [32-bit powermac]
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
> arch/powerpc/Kconfig | 1 +
> arch/powerpc/kernel/vmlinux.lds.S | 22 +++++++++++-----------
> 2 files changed, 12 insertions(+), 11 deletions(-)
I'm happy for this to go in via the kbuild tree.
As long as it's in linux-next it will get tested by my CI which should
hopefully shake out any bugs.
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
cheers
next prev parent reply other threads:[~2018-05-14 2:05 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-09 12:59 [PATCH v2 0/4] LD_DEAD_CODE_DATA_ELIMINATION fixes and enabling for powerpc Nicholas Piggin
2018-05-09 12:59 ` Nicholas Piggin
2018-05-09 12:59 ` [PATCH v2 1/4] kbuild: Fix asm-generic/vmlinux.lds.h for LD_DEAD_CODE_DATA_ELIMINATION Nicholas Piggin
2018-05-09 12:59 ` Nicholas Piggin
2018-05-09 12:59 ` [PATCH v2 2/4] kbuild: LD_DEAD_CODE_DATA_ELIMINATION no -ffunction-sections/-fdata-sections for module build Nicholas Piggin
2018-05-09 12:59 ` Nicholas Piggin
2018-05-09 13:00 ` [PATCH v2 3/4] kbuild: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selectable if enabled Nicholas Piggin
2018-05-09 13:00 ` Nicholas Piggin
2018-05-09 13:00 ` [PATCH v2 4/4] powerpc: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selected Nicholas Piggin
2018-05-09 13:00 ` Nicholas Piggin
2018-05-14 2:05 ` Michael Ellerman [this message]
2018-05-14 2:05 ` Michael Ellerman
2018-05-14 2:05 ` Michael Ellerman
2018-05-14 6:06 ` Mathieu Malaterre
2018-05-14 6:06 ` Mathieu Malaterre
2018-05-14 0:08 ` [PATCH v2 0/4] LD_DEAD_CODE_DATA_ELIMINATION fixes and enabling for powerpc Masahiro Yamada
2018-05-14 0:08 ` Masahiro Yamada
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