Messages in this thread | | | From | Tejun Heo <> | Subject | [PATCHSET linux-2.6-x86:tip] x86: make percpu offsets zero-based on SMP | Date | Tue, 13 Jan 2009 19:38:04 +0900 |
| |
Hello,
This patchset is re-hash of Mike Travis' original work on zero-based percpu offsets. I couldn't get the original patches working (where is the linker script changes other than the PHDR addition?) and ended up doing a quite similar series of patches. A lot of this patch series was copied verbatim from or got a lot of hints from Mike Travis' original patches. Some differences are...
* better splitted - one thing at a time.
* how the pda is allocated at the head. this patch uses preallocation directly from linker script as it's something arch specific anyway.
* pda ops are wrappers around x86 percpu ops.
* x86-32 SMP is also converted to zero-based offsets, so we should be able to do cpualloc (or whatever) for both subarchs.
This patchset contains the following thirteen patches.
0001-x86_64-fix-pda_to_op.patch 0002-x86-make-early_per_cpu-a-lvalue-and-use-it.patch 0003-x86_64-Cleanup-early-setup_percpu-references.patch 0004-x86_32-make-vmlinux_32.lds.S-use-PERCPU-macro.patch 0005-x86_64-make-percpu-symbols-zerobased-on-SMP.patch 0006-x86_64-load-pointer-to-pda-into-gs-while-brining-u.patch 0007-x86_64-use-static-_cpu_pda-array.patch 0008-x86_64-fold-pda-into-percpu-area-on-SMP.patch 0009-x86_64-merge-64-and-32-SMP-percpu-handling.patch 0010-x86_64-make-pda-a-percpu-variable.patch 0011-x86_64-convert-pda-ops-to-wrappers-around-x86-percp.patch 0012-x86_64-misc-clean-up-after-the-percpu-update.patch 0013-x86_32-make-percpu-symbols-zerobased-on-SMP.patch
0001-0004 prepares for coming changes. 0005 converts x86_64 SMP percpu to zero based offset. 0006-0007 preps for percpu/pda simplification. 0008-0012 unifies percpu and pda handling step-by-step. 0013 converts x86_32 SMP percpu to zer based offset.
Each step was tested with gcc-4.1.3, 4.2.3 and 4.3.1 on x86_64, 4.3.1 on i386 for both SMP and UP configurations. The final state is currently being tested using 4.2.3 on both x86_64 and 32.
This patchset is on top of the current linux-2.6-x86:tip[1] and also available in the following git tree.
http://git.kernel.org/?p=linux/kernel/git/tj/misc.git;a=shortlog;h=x86-percpu-zerobased git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git x86-percpu-zerobased
arch/x86/include/asm/pda.h | 97 ++-------------------- arch/x86/include/asm/percpu.h | 137 ++++++++++++------------------- arch/x86/include/asm/setup.h | 1 arch/x86/include/asm/smp.h | 2 arch/x86/include/asm/topology.h | 5 - arch/x86/include/asm/trampoline.h | 1 arch/x86/kernel/acpi/sleep.c | 1 arch/x86/kernel/apic.c | 13 --- arch/x86/kernel/asm-offsets_64.c | 2 arch/x86/kernel/cpu/common.c | 17 ++- arch/x86/kernel/entry_64.S | 7 - arch/x86/kernel/head64.c | 23 ----- arch/x86/kernel/head_32.S | 37 +++++++- arch/x86/kernel/head_64.S | 47 +++++++++- arch/x86/kernel/setup_percpu.c | 156 +++++++++++++++++++----------------- arch/x86/kernel/smpboot.c | 61 -------------- arch/x86/kernel/smpcommon.c | 3 arch/x86/kernel/vmlinux_32.lds.S | 23 +++-- arch/x86/kernel/vmlinux_64.lds.S | 22 ++++- arch/x86/kernel/x8664_ksyms_64.c | 2 arch/x86/mach-voyager/voyager_smp.c | 2 arch/x86/xen/enlighten.c | 2 arch/x86/xen/smp.c | 10 -- include/asm-generic/sections.h | 2 include/asm-generic/vmlinux.lds.h | 74 +++++++++++++++-- 25 files changed, 353 insertions(+), 394 deletions(-)
Thanks.
-- tejun
[1] c69feb89654622a77c5a8d8e5b20e3dbe0a7a92b
| |