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    Subject[PATCH 00/11] x86: cpumask: some more cpumask cleanups

    Here's some more cpumask cleanups.

    ia64: cpumask fix for is_affinity_mask_valid()
    cpumask: update local_cpus_show to use new cpumask API
    cpumask: update pci_bus_show_cpuaffinity to use new cpumask API
    x86: cleanup remaining cpumask_t ops in smpboot code
    x86: clean up speedstep-centrino and reduce cpumask_t usage
    cpumask: Replace CPUMASK_ALLOC etc with cpumask_var_t.
    cpumask: convert struct cpufreq_policy to cpumask_var_t.
    cpumask: use work_on_cpu in acpi/cstate.c
    cpumask: use cpumask_var_t in acpi-cpufreq.c
    cpumask: use work_on_cpu in acpi-cpufreq.c for drv_read and drv_write
    cpumask: use work_on_cpu in acpi-cpufreq.c for read_measured_perf_ctrs

    This version basically splits out the changes to make it more
    bisectable, and has been patch-wise compile/boot tested. Updated
    stats are below.

    Signed-off-by: Mike Travis <travis@sgi.com>
    Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
    Cc: Dave Jones <davej@redhat.com>
    Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
    Cc: Len Brown <len.brown@intel.com>

    ---

    The number of stack hogs have been significantly reduced:

    ====== Stack (-l 500)
    1 - allyesconfig-128
    2 - allyesconfig-4k

    .1. .2. ..final..
    0 +1032 1032 . flush_tlb_page
    0 +1024 1024 . kvm_reload_remote_mmus
    0 +1024 1024 . kvm_flush_remote_tlbs
    0 +1024 1024 . flush_tlb_mm
    0 +1024 1024 . flush_tlb_current_task
    0 +824 824 . efx_pci_probe_main
    0 +800 800 . cpuset_write_resmask
    0 +736 736 . update_flag
    0 +696 696 . init_intel_cacheinfo
    0 +640 640 . cpuset_attach
    0 +600 600 . shmem_getpage
    0 +600 600 . powernowk8_target
    0 +584 584 . powernowk8_cpu_init
    0 +584 584 . __percpu_alloc_mask
    0 +552 552 . xen_flush_tlb_others
    0 +552 552 . smp_call_function_many
    0 +536 536 . reload_store
    0 +536 536 . native_flush_tlb_others
    0 +536 536 . cpuset_common_file_read
    0 +528 528 . get_cur_freq
    0 +528 528 . check_supported_cpu
    0 +520 520 . powernowk8_get
    0 +520 520 . microcode_write
    0 +520 520 . microcode_init_cpu
    0 +520 520 . cpuset_can_attach
    0 +512 512 . smi_request
    0 +512 512 . pci_device_probe
    0 +512 512 . find_lowest_rq


    And the overall memory usage is becoming quite less affected by changing
    NR_CPUS from 128 to 4096:

    ====== Text/Data ()
    1 - allyesconfig-128
    2 - allyesconfig-4k

    .1. .2. ..final..
    32950272 +10240 32960512 +0.03% TextSize
    45082624 +77824 45160448 +0.17% DataSize
    11436032 +4167680 15603712 +36% BssSize
    3514368 +794624 4308992 +22% InitSize
    1904640 +4096 1908736 +0.22% PerCPU
    360448 +722944 1083392 +200% OtherSize
    95248384 +5777408 101025792 +106% Totals


    Detailing it by section shows there still are a few areas to examine more
    closely. Note init.data is "give back" memory, but data.cacheline_aligned
    indicates there are still many lists sized by NR_CPUS.


    ====== Sections (-l 500)
    1 - allyesconfig-128
    2 - allyesconfig-4k

    .1. .2. ..final..
    563607471 +6217546 569825017 +1.10% Total
    362852723 +357693 363210416 +0.10% .debug_info
    43002053 +10004 43012057 +0.02% .debug_loc
    32949913 +10464 32960377 +0.03% .text
    25793792 +4848 25798640 +0.02% .debug_ranges
    22693731 +39360 22733091 +0.17% .rodata
    21157048 +33968 21191016 +0.16% .data
    19190023 +983 19191006 +0.01% .debug_line
    11436936 +4167424 15604360 +36% .bss
    7205306 +85021 7290327 +1.18% .debug_abbrev
    1904160 +5504 1909664 +0.29% .data.percpu
    829999 +709 830708 +0.09% .init.text
    595328 +783920 1379248 +131% .init.data
    150400 +1456 151856 +0.97% __param
    101464 +239632 341096 +236% .data.read_mostly
    32384 +475648 508032 +1468% .data.cacheline_aligned



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