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Fenghua Yu 5fb7dc37dc define new percpu interface for shared data 
per cpu data section contains two types of data.  One set which is
exclusively accessed by the local cpu and the other set which is per cpu,
but also shared by remote cpus.  In the current kernel, these two sets are
not clearely separated out.  This can potentially cause the same data
cacheline shared between the two sets of data, which will result in
unnecessary bouncing of the cacheline between cpus.

One way to fix the problem is to cacheline align the remotely accessed per
cpu data, both at the beginning and at the end.  Because of the padding at
both ends, this will likely cause some memory wastage and also the
interface to achieve this is not clean.

This patch:

Moves the remotely accessed per cpu data (which is currently marked
as ____cacheline_aligned_in_smp) into a different section, where all the data
elements are cacheline aligned. And as such, this differentiates the local
only data and remotely accessed data cleanly.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: <linux-arch@vger.kernel.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 10:04:44 -07:00
..
mach-bigsmp [PATCH] x86: default to physical mode on hotplug CPU kernels 2007-05-02 19:27:04 +02:00
mach-default paravirt: increase IRQ limit 2007-07-18 08:47:41 -07:00
mach-es7000 i386: es7000 build breakage fix 2007-07-06 10:23:43 -07:00
mach-generic [PATCH] x86: default to physical mode on hotplug CPU kernels 2007-05-02 19:27:04 +02:00
mach-numaq [PATCH] x86: default to physical mode on hotplug CPU kernels 2007-05-02 19:27:04 +02:00
mach-summit [PATCH] x86: Log reason why TSC was marked unstable 2007-05-02 19:27:08 +02:00
mach-visws [PATCH] x86: default to physical mode on hotplug CPU kernels 2007-05-02 19:27:04 +02:00
mach-voyager [PATCH] clockevents: i386 drivers 2007-02-16 08:13:59 -08:00
xen xen: add the Xenbus sysfs and virtual device hotplug driver 2007-07-18 08:47:45 -07:00
8253pit.h
a.out.h
acpi.h ACPI: cleanup: make disable_acpi() valid w/o CONFIG_ACPI 2007-02-13 00:09:13 -05:00
agp.h [AGPGART] Move [un]map_page_into_agp into asm/agp.h 2007-04-26 14:22:50 -04:00
alternative-asm.i Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
alternative.h i386: work around miscompilation of alternatives code 2007-05-11 08:29:32 -07:00
apic.h [PATCH] i386: safe_apic_wait_icr_idle - i386 2007-05-02 19:27:17 +02:00
apicdef.h x86_64: Remove stale lapic definition from apicdef.h 2006-04-01 22:50:03 -05:00
arch_hooks.h IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
atomic.h i386: fix early usage of atomic_add_return and local_add_return on real i386 2007-05-23 20:14:15 -07:00
auxvec.h
bitops.h Fix misspellings collected by members of KJ list. 2007-05-09 07:14:03 +02:00
boot.h include/asm-i386/boot.h: This is <asm/boot.h>, not <linux/boot.h> 2007-07-12 10:55:54 -07:00
bootparam.h Make struct boot_params a real structure, and remove obsolete fields 2007-07-12 10:55:54 -07:00
bug.h [PATCH] Generic BUG for i386 2006-12-08 08:28:39 -08:00
bugs.h [PATCH] x86: update for i386 and x86-64 check_bugs 2007-05-02 19:27:16 +02:00
byteorder.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
cache.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
cacheflush.h [PATCH] Optimize D-cache alias handling on fork 2006-12-13 09:27:08 -08:00
checksum.h [NET]: I386 checksum annotations and cleanups. 2006-12-02 21:23:19 -08:00
cmpxchg.h x86: create asm/cmpxchg.h 2007-05-08 11:15:20 -07:00
cpu.h [PATCH] i386: introduce the mechanism of disabling cpu hotplug control 2006-12-07 02:14:10 +01:00
cpufeature.h Use a new CPU feature word to cover features that are spread around 2007-07-12 10:55:54 -07:00
cputime.h
current.h [PATCH] i386: Convert PDA into the percpu section 2007-05-02 19:27:16 +02:00
debugreg.h
delay.h [PATCH] vmi: paravirt drop udelay op 2007-03-05 07:57:52 -08:00
desc.h [PATCH] i386: Page-align the GDT 2007-05-02 19:27:15 +02:00
device.h ACPI: Change ACPI to use dev_archdata instead of firmware_data 2006-12-01 14:52:01 -08:00
div64.h [NET]: div64_64 consolidate (rev3) 2007-04-25 22:23:33 -07:00
dma-mapping.h x86: Disable DAC on VIA bridges 2007-06-20 14:27:25 -07:00
dma.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
dmi.h [PATCH] x86_64: Implement early DMI scanning 2006-03-25 09:10:55 -08:00
dwarf2.h [PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinder 2006-09-26 10:52:41 +02:00
e820.h Make definitions for struct e820entry and struct e820map consistent 2007-07-12 10:55:54 -07:00
edac.h
elf.h i386: sched.h inclusion from module.h is baack 2007-05-08 11:15:08 -07:00
emergency-restart.h
errno.h
fb.h fbdev: detect primary display device 2007-07-17 10:23:11 -07:00
fcntl.h
fixmap.h serial: convert early_uart to earlycon for 8250 2007-07-16 09:05:35 -07:00
floppy.h IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
frame.i Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
futex.h [PATCH] mm: pagefault_{disable,enable}() 2006-12-07 08:39:21 -08:00
genapic.h [PATCH] x86: default to physical mode on hotplug CPU kernels 2007-05-02 19:27:04 +02:00
hardirq.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
highmem.h [PATCH] i386: PARAVIRT: add kmap_atomic_pte for mapping highpte pages 2007-05-02 19:27:15 +02:00
hpet.h [PATCH] x86: adjust inclusion of asm/fixmap.h 2007-05-02 19:27:04 +02:00
hw_irq.h [PATCH] i386/x86_64: Remove global IO_APIC_VECTOR 2006-10-08 12:24:02 -07:00
hypertransport.h [PATCH] Initial generic hypertransport interrupt support 2006-10-04 07:55:29 -07:00
i387.h [PATCH] i386: avoid redundant preempt_disable in __unlazy_fpu 2007-05-02 19:27:21 +02:00
i8253.h [PATCH] clockevents: i386 drivers 2007-02-16 08:13:59 -08:00
i8259.h
ide.h fix jvc cdrom drive lockup 2007-07-16 09:05:40 -07:00
intel_arch_perfmon.h [PATCH] x86: i386/x86-64 Add nmi watchdog support for new Intel CPUs 2006-09-26 10:52:27 +02:00
io.h serial: convert early_uart to earlycon for 8250 2007-07-16 09:05:35 -07:00
io_apic.h [PATCH] io_apic.h needs apicdef.h 2007-03-05 07:57:50 -08:00
ioctl.h
ioctls.h tty: i386/x86_64 arbitary speed support 2007-05-08 11:15:03 -07:00
ipc.h
ipcbuf.h
irq.h xen: Core Xen implementation 2007-07-18 08:47:42 -07:00
irq_regs.h [PATCH] i386: Convert PDA into the percpu section 2007-05-02 19:27:16 +02:00
irqflags.h [PATCH] i386: Use X86_EFLAGS_IF in irqflags.h. 2007-05-02 19:27:10 +02:00
ist.h
k8.h [PATCH] x86_64: Clean and enhance up K8 northbridge access code 2006-06-26 10:48:15 -07:00
Kbuild [PATCH] x86: Clean up x86 control register and MSR macros (corrected) 2007-05-02 19:27:12 +02:00
kdebug.h Revert "ipmi: add new IPMI nmi watchdog handling" 2007-05-14 15:24:24 -07:00
kexec.h kdump/kexec: calculate note size at compile time 2007-05-08 11:15:07 -07:00
kmap_types.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
kprobes.h jprobes: remove JPROBE_ENTRY() 2007-07-19 10:04:44 -07:00
ldt.h
linkage.h
local.h i386: fix early usage of atomic_add_return and local_add_return on real i386 2007-05-23 20:14:15 -07:00
math_emu.h [PATCH] i386: PDA: Fix math emulator for new pt_regs 2006-12-07 02:14:03 +01:00
mc146818rtc.h
mca.h
mca_dma.h [PATCH] kernel-doc for kernel/dma.c 2006-10-03 08:03:41 -07:00
mce.h [PATCH] i386: Move mce_disabled to asm/mce.h 2007-02-13 13:26:26 +01:00
mman.h [PATCH] add asm-generic/mman.h 2006-02-15 15:32:22 -08:00
mmu.h [PATCH] vdso: randomize the i386 vDSO by moving it into a vma 2006-06-27 17:32:38 -07:00
mmu_context.h paravirt: unstatic leave_mm 2007-07-18 08:47:41 -07:00
mmx.h
mmzone.h i386 mmzone: use __maybe_unused 2007-05-09 12:30:57 -07:00
module.h [PATCH] i386: Add an option for the VIA C7 which sets appropriate L1 cache 2007-05-02 19:27:05 +02:00
mpspec.h [PATCH] clockevents: i386 drivers 2007-02-16 08:13:59 -08:00
mpspec_def.h [PATCH] x86-64: remove remaining pc98 code 2006-12-07 02:14:19 +01:00
msgbuf.h
msidef.h [PATCH] genirq: i386 irq: Move msi message composition into io_apic.c 2006-10-04 07:55:28 -07:00
msr-index.h [PATCH] i386: Enable support for fixed-range IORRs to keep RdMem & WrMem in sync 2007-05-02 19:27:17 +02:00
msr.h i386: msr.h: be paranoid about types and parentheses 2007-05-09 12:49:33 -07:00
mtrr.h [PATCH] x86: Save the MTRRs of the BSP before booting an AP 2007-05-02 19:27:17 +02:00
mutex.h [PATCH] i386: Remove lock section support in mutex.h 2006-09-26 10:52:31 +02:00
namei.h
nmi.h [PATCH] i386: Clean up NMI watchdog code 2007-05-02 19:27:20 +02:00
numa.h
numaq.h
page.h Add __GFP_MOVABLE for callers to flag allocations from high memory that may be migrated 2007-07-17 10:22:59 -07:00
param.h [PATCH] cleanup asm/setup.h userspace visibility 2006-12-07 08:39:46 -08:00
paravirt.h Add a sched_clock paravirt_op 2007-07-18 08:47:42 -07:00
parport.h
pci-direct.h
pci.h PCI: remove pci_dac_dma_... APIs 2007-07-11 16:02:11 -07:00
percpu.h define new percpu interface for shared data 2007-07-19 10:04:44 -07:00
pgalloc.h paravirt: add an "mm" argument to alloc_pt 2007-07-18 08:47:40 -07:00
pgtable-2level-defs.h [PATCH] i386: PARAVIRT: Allow paravirt backend to choose kernel PMD sharing 2007-05-02 19:27:13 +02:00
pgtable-2level.h page table handling cleanup 2007-07-16 09:05:36 -07:00
pgtable-3level-defs.h [PATCH] i386: PARAVIRT: Allow paravirt backend to choose kernel PMD sharing 2007-05-02 19:27:13 +02:00
pgtable-3level.h page table handling cleanup 2007-07-16 09:05:36 -07:00
pgtable.h mm: remove ptep_test_and_clear_dirty and ptep_clear_flush_dirty 2007-07-17 10:22:59 -07:00
poll.h Consolidate asm/poll.h 2007-05-11 08:29:34 -07:00
posix_types.h i386: improve and correct inline asm memory constraints 2006-07-08 15:24:18 -07:00
processor-flags.h [PATCH] x86: Clean up x86 control register and MSR macros (corrected) 2007-05-02 19:27:12 +02:00
processor.h make seccomp zerocost in schedule 2007-07-16 09:05:50 -07:00
ptrace-abi.h [PATCH] Split i386 and x86_64 ptrace.h 2006-09-26 08:49:10 -07:00
ptrace.h [PATCH] i386: Profile pc badness 2007-02-13 13:26:21 +01:00
reboot.h [PATCH] i386: Add machine_ops interface to abstract halting and rebooting 2007-05-02 19:27:11 +02:00
reboot_fixups.h [PATCH] i386: clean up mach_reboot_fixups 2007-05-02 19:27:06 +02:00
required-features.h Use a new CPU feature word to cover features that are spread around 2007-07-12 10:55:54 -07:00
resource.h
rtc.h
rwlock.h [PATCH] i386: Clean up spin/rwlocks 2006-09-26 10:52:32 +02:00
rwsem.h [PATCH] lockdep: name some old style locks 2006-12-07 08:39:36 -08:00
scatterlist.h PCI: scatterlist.h needs types.h 2007-05-02 19:02:34 -07:00
seccomp.h
sections.h
segment.h [PATCH] i386: Fix UP gdt bugs 2007-05-02 19:27:16 +02:00
semaphore.h [PATCH] i386: Use early clobbers for semaphores now 2006-09-27 14:39:51 -07:00
sembuf.h
serial.h x86, serial: convert legacy COM ports to platform devices 2007-05-08 11:15:23 -07:00
setup.h paravirt: add a hook for once the allocator is ready 2007-07-18 08:47:41 -07:00
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h [PATCH] headers_check: move inclusion of <linux/linkage.h> in <asm-i386/signal.h> 2006-09-13 07:32:15 -07:00
smp.h paravirt: make siblingmap functions visible 2007-07-18 08:47:41 -07:00
socket.h [NET]: Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS support 2007-04-25 22:24:21 -07:00
sockios.h [NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution 2007-04-25 22:24:04 -07:00
sparsemem.h
spinlock.h [PATCH] paravirt: Patch inline replacements for paravirt intercepts 2006-12-07 02:14:08 +01:00
spinlock_types.h [PATCH] Remove 'volatile' from spinlock_types 2006-12-06 14:39:53 -08:00
srat.h
stacktrace.h [PATCH] i386: Do stacktracer conversion too 2006-09-26 10:52:34 +02:00
stat.h [PATCH] 2TB files: st_blocks is invalid when calling stat64 2006-03-26 08:57:00 -08:00
statfs.h
string.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
suspend.h Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 2006-12-07 08:59:11 -08:00
sync_bitops.h Fix misspellings collected by members of KJ list. 2007-05-09 07:14:03 +02:00
system.h x86: create asm/cmpxchg.h 2007-05-08 11:15:20 -07:00
termbits.h tty: i386/x86_64 arbitary speed support 2007-05-08 11:15:03 -07:00
termios.h tty: i386/x86_64 arbitary speed support 2007-05-08 11:15:03 -07:00
therm_throt.h [PATCH] x86: Add a cumulative thermal throttle event counter. 2006-09-26 10:52:42 +02:00
thread_info.h make seccomp zerocost in schedule 2007-07-16 09:05:50 -07:00
time.h [PATCH] vmi: pit override 2007-03-05 07:57:52 -08:00
timer.h Add a sched_clock paravirt_op 2007-07-18 08:47:42 -07:00
timex.h [PATCH] Time: i386 Conversion - part 2: Rework TSC Support 2006-06-26 09:58:21 -07:00
tlb.h
tlbflush.h Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
topology.h [PATCH] sched: remove SMT nice 2007-03-05 07:57:51 -08:00
tsc.h i386: work around miscompilation of alternatives code 2007-05-11 08:29:32 -07:00
types.h [PATCH] Centralise definitions of sector_t and blkcnt_t 2006-12-04 19:41:15 -08:00
uaccess.h [PATCH] i386: Update __copy_to_user_inatomic linuxdoc description 2007-05-02 19:27:06 +02:00
ucontext.h
unaligned.h
unistd.h sys_fallocate() implementation on i386, x86_64 and powerpc 2007-07-17 21:42:44 -04:00
unwind.h Remove stack unwinder for now 2006-12-15 08:47:51 -08:00
user.h
vga.h [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
vic.h [VOYAGER] fix up ptregs removal mess 2006-10-12 22:25:03 -05:00
vm86.h [PATCH] i386: Update sys_vm86 to cope with changed pt_regs and %gs usage 2006-12-07 02:14:03 +01:00
vmi.h [PATCH] vmi: apic ops 2007-03-05 07:57:52 -08:00
vmi_time.h Add a sched_clock paravirt_op 2007-07-18 08:47:42 -07:00
voyager.h [VOYAGER] Convert the monitor thread to use the kthread API 2007-05-01 10:09:29 -05:00
xor.h