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98c9e27a56
kernel-ark/arch/x86/kernel
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Mike Travis 98c9e27a56 x86: fix cpu_to_node references 
In x86_64 and i386 architectures most arrays that are sized using
NR_CPUS lay in local memory on node 0.  Not only will most (99%?) of the
systems not use all the slots in these arrays, particularly when NR_CPUS
is increased to accommodate future very high cpu count systems, but a
number of cache lines are passed unnecessarily on the system bus when
these arrays are referenced by cpus on other nodes.

Typically, the values in these arrays are referenced by the cpu
accessing it's own values, though when passing IPI interrupts, the cpu
does access the data relevant to the targeted cpu/node.  Of course, if
the referencing cpu is not on node 0, then the reference will still
require cross node exchanges of cache lines.  A common use of this is
for an interrupt service routine to pass the interrupt to other cpus
local to that node.

Ideally, all the elements in these arrays should be moved to the per_cpu
data area.  In some cases (such as x86_cpu_to_apicid) the array is
referenced before the per_cpu data areas are setup.  In this case, a
static array is declared in the __initdata area and initialized by the
booting cpu (BSP).  The values are then moved to the per_cpu area after
it is initialized and the original static array is freed with the rest
of the __initdata.

This patch:

Fix four instances where cpu_to_node is referenced by array instead of
via the cpu_to_node macro.  This is preparation to moving it to the
per_cpu data area.

Signed-off-by: Mike Travis <travis@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-17 20:16:37 +02:00
..
acpi Merge branch 'dmi-const' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/misc-2.6 2007-10-11 19:18:45 -07:00
cpu i386: constify wd_ops 2007-10-17 20:16:33 +02:00
cpufreq x86_64: move kernel/cpufreq 2007-10-11 11:17:06 +02:00
.gitignore i386: move kernel 2007-10-11 11:17:01 +02:00
alternative.c x86: misc. constifications 2007-10-17 20:16:08 +02:00
aperture_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
apic_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
apic_64.c x86: C1E late detection fix. Really switch off lapic timer 2007-10-17 20:15:13 +02:00
apm_32.c Merge branch 'dmi-const' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/misc-2.6 2007-10-11 19:18:45 -07:00
asm-offsets_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
asm-offsets_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
asm-offsets.c i386: move kernel 2007-10-11 11:17:01 +02:00
audit_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
bootflag.c i386: move kernel 2007-10-11 11:17:01 +02:00
bugs_64.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
cpuid.c i386: simplify smp_call_function_single() call sequence in cpuid 2007-10-17 20:16:19 +02:00
crash_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
crash_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
crash_dump_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
crash_dump_64.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
doublefault_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
e820_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
e820_64.c [x86] remove uses of magic macros for boot_params access 2007-10-16 17:38:31 -07:00
early_printk.c [x86] remove uses of magic macros for boot_params access 2007-10-16 17:38:31 -07:00
early-quirks_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
efi_32.c [x86] remove uses of magic macros for boot_params access 2007-10-16 17:38:31 -07:00
efi_stub_32.S i386: move kernel 2007-10-11 11:17:01 +02:00
entry_32.S lockdep: i386: connect the sysexit hook 2007-10-11 22:11:12 +02:00
entry_64.S x86: return correct error code from child_rip in x86_64 entry.S 2007-10-17 20:15:29 +02:00
genapic_64.c x86: remove x86_cpu_to_log_apicid 2007-10-17 20:16:24 +02:00
genapic_flat_64.c x86: remove x86_cpu_to_log_apicid 2007-10-17 20:16:24 +02:00
geode_32.c x86: Geode Multi-Function General Purpose Timers support 2007-10-12 23:04:06 +02:00
head64.c [x86] remove uses of magic macros for boot_params access 2007-10-16 17:38:31 -07:00
head_32.S x86: prepare page allocator for high allocations on PAGEALLOC=y 2007-10-17 20:15:38 +02:00
head_64.S x86_64: move kernel 2007-10-11 11:17:24 +02:00
hpet.c x86: HPET force enable for ICH5 2007-10-12 23:04:24 +02:00
i386_ksyms_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
i387_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
i387_64.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
i8237.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
i8253.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
i8259_32.c x86: clean up struct irqaction initializers 2007-10-17 20:16:06 +02:00
i8259_64.c x86: more struct irqaction initializer cleanups 2007-10-17 20:16:07 +02:00
init_task_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
init_task_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
io_apic_32.c Convert cpu_sibling_map to be a per cpu variable 2007-10-16 09:42:50 -07:00
io_apic_64.c x86: kmalloc + memset conversion to kzalloc 2007-10-17 20:16:18 +02:00
ioport_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
ioport_64.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
irq_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
irq_64.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
k8.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
kprobes_32.c kprobes: support kretprobe blacklist 2007-10-16 09:43:10 -07:00
kprobes_64.c kprobes: support kretprobe blacklist 2007-10-16 09:43:10 -07:00
ldt_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
ldt_64.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
machine_kexec_32.c add-vmcore: add a prefix "VMCOREINFO_" to the vmcoreinfo macros 2007-10-17 08:42:54 -07:00
machine_kexec_64.c add-vmcore: add a prefix "VMCOREINFO_" to the vmcoreinfo macros 2007-10-17 08:42:54 -07:00
Makefile x86_64: move kernel 2007-10-11 11:17:24 +02:00
Makefile_32 x86_64: remove now unused code 2007-10-12 23:04:23 +02:00
Makefile_64 x86_64: remove now unused code 2007-10-12 23:04:23 +02:00
mca_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
mce_64.c x86: clean up mce= argument parsing slightly 2007-10-17 20:16:32 +02:00
mce_amd_64.c x86: Convert cpu_core_map to be a per cpu variable 2007-10-16 09:42:50 -07:00
mce_intel_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
mfgpt_32.c x86: Geode MFGPT clock event device support 2007-10-12 23:04:06 +02:00
microcode.c i386: move kernel 2007-10-11 11:17:01 +02:00
module_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
module_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
mpparse_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
mpparse_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
msr.c i386: Misc cpuinit annotations 2007-10-17 20:16:00 +02:00
nmi_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
nmi_64.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
numaq_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
paravirt_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
pci-calgary_64.c x86: Calgary: fix disable busnum for CalIOC2 2007-10-17 20:15:45 +02:00
pci-dma_32.c i386: Clean up duplicate includes in arch/i386/kernel/ 2007-10-17 20:15:51 +02:00
pci-dma_64.c x86: use dev_to_node() to get node for device in dma_alloc_pages() 2007-10-17 20:15:47 +02:00
pci-gart_64.c x86: Some cleanups for pci gart code 2007-10-17 20:16:10 +02:00
pci-nommu_64.c x86-64: update nommu to sg helpers 2007-10-16 11:26:02 +02:00
pci-swiotlb_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
pcspeaker.c i386: move kernel 2007-10-11 11:17:01 +02:00
pmtimer_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
process_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
process_64.c kprobes: support kretprobe blacklist 2007-10-16 09:43:10 -07:00
ptrace_32.c Consolidate PTRACE_DETACH 2007-10-16 09:42:49 -07:00
ptrace_64.c Consolidate PTRACE_DETACH 2007-10-16 09:42:49 -07:00
quirks.c x86: HPET add another ICH7 PCI id 2007-10-12 23:04:24 +02:00
reboot_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
reboot_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
reboot_fixups_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
relocate_kernel_32.S i386: move kernel 2007-10-11 11:17:01 +02:00
relocate_kernel_64.S x86_64: move kernel 2007-10-11 11:17:24 +02:00
scx200_32.c long vs. unsigned long - low-hanging fruits in drivers 2007-10-14 12:41:51 -07:00
setup64.c [x86] remove uses of magic macros for boot_params access 2007-10-16 17:38:31 -07:00
setup_32.c [x86] remove uses of magic macros for boot_params access 2007-10-16 17:38:31 -07:00
setup_64.c x86: misc. constifications 2007-10-17 20:16:08 +02:00
sigframe_32.h i386: move kernel 2007-10-11 11:17:01 +02:00
signal_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
signal_64.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
smp_32.c i386: export i386 smp_call_function_mask() to modules 2007-10-17 20:15:21 +02:00
smp_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
smpboot_32.c x86: misc. constifications 2007-10-17 20:16:08 +02:00
smpboot_64.c x86: remove x86_cpu_to_log_apicid 2007-10-17 20:16:24 +02:00
smpcommon_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
srat_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
stacktrace.c x86: constify stacktrace_ops 2007-10-17 20:16:11 +02:00
summit_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
suspend_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
suspend_asm_64.S x86_64: move kernel 2007-10-11 11:17:24 +02:00
sys_i386_32.c remove include/asm-*/ipc.h 2007-10-17 08:42:55 -07:00
sys_x86_64.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
syscall_64.c i386/x86_64: move headers to include/asm-x86 2007-10-11 11:20:03 +02:00
syscall_table_32.S i386: move kernel 2007-10-11 11:17:01 +02:00
sysenter_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
tce_64.c x86: Create clflush() inline, remove hardcoded wbinvd 2007-10-17 20:16:12 +02:00
time_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
time_64.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
topology.c i386: no need to make enable_cpu_hotplug a variable 2007-10-17 20:16:16 +02:00
trampoline_32.S x86: misc. constifications 2007-10-17 20:16:08 +02:00
trampoline_64.S x86: misc. constifications 2007-10-17 20:16:08 +02:00
traps_32.c x86: constify stacktrace_ops 2007-10-17 20:16:11 +02:00
traps_64.c x86: constify stacktrace_ops 2007-10-17 20:16:11 +02:00
tsc_32.c x86: do not crash on non-Geode PCs in TSC probe 2007-10-17 20:15:37 +02:00
tsc_64.c x86: unify timex.h variants 2007-10-12 23:04:23 +02:00
tsc_sync.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
verify_cpu_64.S x86_64: move kernel 2007-10-11 11:17:24 +02:00
vm86_32.c Delete filenames in comments. 2007-10-13 10:01:23 -07:00
vmi_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
vmiclock_32.c i386: move kernel 2007-10-11 11:17:01 +02:00
vmlinux_32.lds.S i386: move kernel 2007-10-11 11:17:01 +02:00
vmlinux_64.lds.S x86_64: move kernel 2007-10-11 11:17:24 +02:00
vmlinux.lds.S i386: move kernel 2007-10-11 11:17:01 +02:00
vsmp_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00
vsyscall_32.lds.S i386: move kernel 2007-10-11 11:17:01 +02:00
vsyscall_32.S i386: move kernel 2007-10-11 11:17:01 +02:00
vsyscall_64.c x86: fix cpu_to_node references 2007-10-17 20:16:37 +02:00
vsyscall-int80_32.S i386: move kernel 2007-10-11 11:17:01 +02:00
vsyscall-note_32.S i386: move kernel 2007-10-11 11:17:01 +02:00
vsyscall-sigreturn_32.S i386: move kernel 2007-10-11 11:17:01 +02:00
vsyscall-sysenter_32.S i386: move kernel 2007-10-11 11:17:01 +02:00
x8664_ksyms_64.c x86_64: move kernel 2007-10-11 11:17:24 +02:00