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aha/arch/sparc/kernel
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Tejun Heo ce3141a277 percpu: drop pcpu_chunk->page[] 
percpu core doesn't need to tack all the allocated pages.  It needs to
know whether certain pages are populated and a way to reverse map
address to page when freeing.  This patch drops pcpu_chunk->page[] and
use populated bitmap and vmalloc_to_page() lookup instead.  Using
vmalloc_to_page() exclusively is also possible but complicates first
chunk handling, inflates cache footprint and prevents non-standard
memory allocation for percpu memory.

pcpu_chunk->page[] was used to track each page's allocation and
allowed asymmetric population which happens during failure path;
however, with single bitmap for all units, this is no longer possible.
Bite the bullet and rewrite (de)populate functions so that things are
done in clearly separated steps such that asymmetric population
doesn't happen.  This makes the (de)population process much more
modular and will also ease implementing non-standard memory usage in
the future (e.g. large pages).

This makes @get_page_fn parameter to pcpu_setup_first_chunk()
unnecessary.  The parameter is dropped and all first chunk helpers are
updated accordingly.  Please note that despite the volume most changes
to first chunk helpers are symbol renames for variables which don't
need to be referenced outside of the helper anymore.

This change reduces memory usage and cache footprint of pcpu_chunk.
Now only #unit_pages bits are necessary per chunk.

[ Impact: reduced memory usage and cache footprint for bookkeeping ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
2009-07-04 08:11:00 +09:00
..
.gitignore sparc: gitignore a few files 2008-12-04 09:17:15 -08:00
apc.c sparc: correct section of apc_no_idle 2008-10-22 21:53:43 -07:00
asm-offsets.c sparc,sparc64: unify asm-offsets.c 2008-12-04 09:17:12 -08:00
audit.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
auxio_32.c sparc: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:05 -08:00
auxio_64.c sparc64: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:20 -08:00
central.c sparc64: Initialize FHC/CLOCK LED platform_device 'id' field correctly. 2009-01-19 13:27:15 -08:00
cherrs.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
chmc.c sparc64: Fix crashes in jbusmc_print_dimm() 2009-02-11 00:54:07 -08:00
compat_audit.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
cpu.c sparc: Probe PMU type and record in sparc_pmu_type. 2009-01-28 17:27:14 -08:00
cpumap.c sparc64: fix and optimize irq distribution 2009-06-16 04:56:28 -07:00
cpumap.h sparc64: fix and optimize irq distribution 2009-06-16 04:56:28 -07:00
devices.c sparc: drop CONFIG_SUN_AUXIO 2008-12-04 13:26:31 -08:00
dma.c sparc: remove dma-mapping_{32|64}.h 2009-06-16 04:56:47 -07:00
dma.h sparc32: Implement more generic dma_*() interfaces. 2008-08-29 02:13:14 -07:00
ds.c sparc64: Defer cpu_data() setup until end of per-cpu data initialization. 2009-06-16 04:56:22 -07:00
dtlb_miss.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
dtlb_prot.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
ebus.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
entry.h sparc: fix sparse warnings in irq_32.c 2008-12-08 01:08:24 -08:00
entry.S [CVE-2009-0029] Remove __attribute__((weak)) from sys_pipe/sys_pipe2 2009-01-14 14:15:15 +01:00
etrap_32.S sparc: prepare kernel/ for unification 2008-12-04 09:17:20 -08:00
etrap_64.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
fpu_traps.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
ftrace.c sparc64: Add proper dynamic ftrace support. 2009-06-16 04:56:53 -07:00
getsetcc.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
head_32.S sparc: cleanup references to deprecated .text.init* sections. 2009-04-27 19:51:58 -07:00
head_64.S sparc64: Store per-cpu offset in trap_block[] 2009-06-16 04:56:11 -07:00
helpers.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
hvapi.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
hvcalls.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
hvtramp.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
idprom.c sparc: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:05 -08:00
init_task.c mm: consolidate init_mm definition 2009-06-16 19:47:28 -07:00
iommu.c sparc: use dma_map_page instead of dma_map_single 2009-06-16 04:56:45 -07:00
iommu_common.h sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
ioport.c sparc: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:05 -08:00
irq.h sparc32: Kill clear_profile_irq btfixup entry. 2008-09-19 21:17:59 -07:00
irq_32.c cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
irq_64.c sparc64: Don't use alloc_bootmem() in init_IRQ() code paths. 2009-06-25 19:00:47 -07:00
itlb_miss.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
ivec.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
kernel.h sparc: Probe PMU type and record in sparc_pmu_type. 2009-01-28 17:27:14 -08:00
kgdb_32.c sparc: add '32' suffix to reg_window, sigcontext, __siginfo_t 2009-01-02 19:32:59 -08:00
kgdb_64.c sparc64: Reschedule KGDB capture to a software interrupt. 2009-03-18 23:51:57 -07:00
kprobes.c trivial: fix then -> than typos in comments and documentation 2009-01-06 11:28:06 +01:00
kstack.h sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
ktlb.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
ldc.c sparc: remove some pointless conditionals before kfree() 2009-04-15 03:04:56 -07:00
led.c proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
Makefile sparc: move of_device common code to of_device_common 2009-06-16 04:56:49 -07:00
mdesc.c sparc64: Defer cpu_data() setup until end of per-cpu data initialization. 2009-06-16 04:56:22 -07:00
misctrap.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
module.c module: cleanup FIXME comments about trimming exception table entries. 2009-06-12 21:47:05 +09:30
muldiv.c sparc: add '32' suffix to reg_window, sigcontext, __siginfo_t 2009-01-02 19:32:59 -08:00
nmi.c sparc64: Fix reset hangs on Niagara systems. 2009-03-29 15:40:33 -07:00
of_device_32.c sparc: move of_device common code to of_device_common 2009-06-16 04:56:49 -07:00
of_device_64.c sparc: move of_device common code to of_device_common 2009-06-16 04:56:49 -07:00
of_device_common.c sparc: move of_device common code to of_device_common 2009-06-16 04:56:49 -07:00
of_device_common.h sparc: move of_device common code to of_device_common 2009-06-16 04:56:49 -07:00
pci.c Delete pcibios_select_root 2009-06-17 14:04:42 -07:00
pci_common.c sparc64: Fix crash with /proc/iomem 2009-03-18 23:53:16 -07:00
pci_fire.c sparc64: Fix section mismatch warnings in PCI controller drivers. 2009-04-08 03:28:15 -07:00
pci_impl.h sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
pci_msi.c sparc64: Use unsigned long long for u64. 2009-01-06 13:19:28 -08:00
pci_psycho.c sparc64: Fix section mismatch warnings in PCI controller drivers. 2009-04-08 03:28:15 -07:00
pci_sabre.c sparc64: Fix section mismatch warnings in PCI controller drivers. 2009-04-08 03:28:15 -07:00
pci_schizo.c sparc64: Use unsigned long long for u64. 2009-01-06 13:19:28 -08:00
pci_sun4v.c sparc: use dma_map_page instead of dma_map_single 2009-06-16 04:56:45 -07:00
pci_sun4v.h sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
pci_sun4v_asm.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
pcic.c sparc: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:05 -08:00
pcr.c sparc64: Don't hook up pcr_ops on spitfire chips. 2009-02-05 23:59:04 -08:00
pmc.c sparc: fix trivial style issues in kernel/pmc.c 2008-12-08 01:02:55 -08:00
power.c sparc64: Fix section mismatch warnings in power driver. 2009-04-08 03:27:52 -07:00
process_32.c Simplify copy_thread() 2009-04-02 19:04:51 -07:00
process_64.c Simplify copy_thread() 2009-04-02 19:04:51 -07:00
prom.h sparc: Call OF and MD cpu scanning explicitly from paging_init() 2009-06-16 04:56:19 -07:00
prom_32.c sparc: Restore irq_trans_init() call in prom_create_node(). 2008-12-07 00:46:33 -08:00
prom_64.c sparc64: Defer cpu_data() setup until end of per-cpu data initialization. 2009-06-16 04:56:22 -07:00
prom_common.c sparc: Call OF and MD cpu scanning explicitly from paging_init() 2009-06-16 04:56:19 -07:00
prom_irqtrans.c sparc64: Use unsigned long long for u64. 2009-01-06 13:19:28 -08:00
psycho_common.c sparc64: fix warnings in psycho_common after ull conversion 2009-01-08 11:37:19 -08:00
psycho_common.h sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
ptrace_32.c sparc: prepare kernel/ for unification 2008-12-04 09:17:20 -08:00
ptrace_64.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
reboot.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
rtrap_32.S sparc: prepare kernel/ for unification 2008-12-04 09:17:20 -08:00
rtrap_64.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
sbus.c sparc64: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:20 -08:00
setup_32.c sparc: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:05 -08:00
setup_64.c sparc: Probe PMU type and record in sparc_pmu_type. 2009-01-28 17:27:14 -08:00
signal32.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
signal_32.c sparc: add '32' suffix to reg_window, sigcontext, __siginfo_t 2009-01-02 19:32:59 -08:00
signal_64.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
smp_32.c cpumask: use mm_cpumask() wrapper: sparc 2009-03-16 14:40:39 +10:30
smp_64.c percpu: drop pcpu_chunk->page[] 2009-07-04 08:11:00 +09:00
sparc_ksyms_32.c sparc: Eliminate PROMLIB_INTERNAL as it does nothing 2009-01-08 16:59:01 -08:00
sparc_ksyms_64.c sparc64: Fix UP build failure. 2009-01-13 17:38:24 -08:00
spiterrs.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
sstate.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
stacktrace.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
starfire.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
sun4c_irq.c sparc: Add missing of_node_put 2008-12-04 09:17:22 -08:00
sun4d_irq.c cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
sun4d_smp.c cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: sparc 2009-03-16 14:40:24 +10:30
sun4m_irq.c sparc: Add missing of_node_put 2008-12-04 09:17:22 -08:00
sun4m_smp.c cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: sparc 2009-03-16 14:40:24 +10:30
sun4v_ivec.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
sun4v_tlb_miss.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
sys32.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
sys_sparc32.c Separate out common fstatat code into vfs_fstatat 2009-04-20 23:02:51 -04:00
sys_sparc_32.c sparc: prepare kernel/ for unification 2008-12-04 09:17:20 -08:00
sys_sparc_64.c sparc64: Annotate sparc64 specific syscalls with SYSCALL_DEFINEx() 2009-01-19 21:11:27 -08:00
syscalls.S sparc64: Annotate sparc64 specific syscalls with SYSCALL_DEFINEx() 2009-01-19 21:11:27 -08:00
sysfs.c sparc: fix hardirq.h removal fallout 2008-12-26 15:33:07 -08:00
systbls.h sparc64: Annotate sparc64 specific syscalls with SYSCALL_DEFINEx() 2009-01-19 21:11:27 -08:00
systbls_32.S sparc: Wire up sys_rt_tgsigqueueinfo(). 2009-06-16 04:56:58 -07:00
systbls_64.S sparc: Wire up sys_rt_tgsigqueueinfo(). 2009-06-16 04:56:58 -07:00
tadpole.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
tick14.c sparc32: Delete claim_ticker14(). 2008-09-19 21:18:01 -07:00
time_32.c sparc: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:05 -08:00
time_64.c clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
trampoline_32.S sparc: prepare kernel/ for unification 2008-12-04 09:17:20 -08:00
trampoline_64.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
traps_32.c sparc: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:05 -08:00
traps_64.c sparc64: Use BUILD_BUG_ON() in trap_init(). 2009-06-16 04:56:13 -07:00
tsb.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
ttable.S sparc64: Reschedule KGDB capture to a software interrupt. 2009-03-18 23:51:57 -07:00
una_asm_32.S sparc: prepare kernel/ for unification 2008-12-04 09:17:20 -08:00
una_asm_64.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
unaligned_32.c sparc: add '32' suffix to reg_window, sigcontext, __siginfo_t 2009-01-02 19:32:59 -08:00
unaligned_64.c sparc: Most unaligned_64.c tweaks for branch tracer warnings. 2009-01-08 16:52:36 -08:00
us2e_cpufreq.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
us3_cpufreq.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
utrap.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
vio.c sparc64: Use unsigned long long for u64. 2009-01-06 13:19:28 -08:00
viohs.c sparc64: refactor code in viohs.c 2009-01-06 12:46:46 -08:00
visemul.c sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
vmlinux.lds.S linker script: throw away .discard section 2009-06-24 15:13:38 +09:00
windows.c sparc: add '32' suffix to reg_window, sigcontext, __siginfo_t 2009-01-02 19:32:59 -08:00
winfixup.S sparc,sparc64: unify kernel/ 2008-12-04 09:17:21 -08:00
wof.S sparc/kernel/: possible cleanups 2008-07-17 21:37:46 -07:00
wuf.S sparc/kernel/: possible cleanups 2008-07-17 21:37:46 -07:00