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Message-Id: <1213021018-14159-1-git-send-email-gcosta@redhat.com>
Date: Mon, 9 Jun 2008 11:16:43 -0300
From: Glauber Costa <gcosta@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: akpm@...ux-foundation.org, tglx@...utronix.de, mingo@...e.hu,
hugh@...itas.com
Subject: [PATCH 0/15] Improve x86 smpboot integration
Ingo,
First of all, sorry for being away for so long ;-)
Here it goes a series of improvements for the x86 smpboot integration.
The final goal is the same: To reduce the difference between architectures,
just this time I do a little bit more ;-)
Basically, this one reduces greatly the ifdef count:
[root@t60 linux-2.6-x86]# git-show 674ce:arch/x86/kernel/smpboot.c \
| grep -e "^#ifdef \+CONFIG_X86_\(32\|64\)" | wc -l
18
[root@t60 linux-2.6-x86]# git-show HEAD:arch/x86/kernel/smpboot.c \
| grep -e "^#ifdef \+CONFIG_X86_\(32\|64\)" | wc -l
8
The remaining ones are _mainly_ (not all) due to the fact that x86_64 uses the pda,
while i386 goes with normal per-cpu data. They are things like:
per_cpu(current_task, cpu) = c_idle.idle; vs cpu_pda(cpu)->pcurrent = c_idle.idle;
Also, there is the low mappings piece of code Hugh detected. To that, I intend
to also find a common base between them. Just I'm not doing it in this series, because
it deserves special attention.
As usual, this series was compiled tested in a whole bunch of different configs ( ~ 10
for each architecture), including all i386 variants. Boot tested in all my hardware.
The final diffstat is:
arch/x86/kernel/head_32.S | 2
arch/x86/kernel/head_64.S | 48 +---------------
arch/x86/kernel/io_apic_32.c | 2
arch/x86/kernel/setup64.c | 1
arch/x86/kernel/smpboot.c | 97 ++++------------------------------
b/arch/x86/kernel/acpi/sleep.c | 2
b/arch/x86/kernel/apic_32.c | 6 --
b/arch/x86/kernel/apic_64.c | 10 +++
b/arch/x86/kernel/head_32.S | 6 +-
b/arch/x86/kernel/head_64.S | 5 +
b/arch/x86/kernel/io_apic_32.c | 5 +
b/arch/x86/kernel/io_apic_64.c | 9 ++-
b/arch/x86/kernel/process_32.c | 16 +++++
b/arch/x86/kernel/setup64.c | 5 -
b/arch/x86/kernel/setup_64.c | 27 +++++++++
b/arch/x86/kernel/smpboot.c | 8 --
b/arch/x86/kernel/traps_32.c | 3 -
b/arch/x86/kernel/x8664_ksyms_64.c | 5 -
b/arch/x86/mach-voyager/voyager_smp.c | 2
b/include/asm-x86/desc.h | 24 +++-----
b/include/asm-x86/hw_irq.h | 3 -
b/include/asm-x86/numa_32.h | 1
b/include/asm-x86/segment.h | 24 ++++----
b/include/asm-x86/smp.h | 2
include/asm-x86/hw_irq.h | 4 -
25 files changed, 122 insertions(+), 195 deletions(-)
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