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    Subject[PATCH 0/1] x86: Convert cpuinfo_x86 array to a per_cpu array v3

    v3: fix compile errors in arch-i386-allmodconfig build

    v2: rebasing on 2.6.23-rc6-mm1

    Analyzing various data structures when NR_CPU count is raised
    to 4096 shows the following arrays over 128k. If the maximum
    number of cpus are not installed (about 99.99% of the time),
    then a large percentage of this memory is wasted.
    151289856 CALNDATA irq_desc
    135530496 RMDATATA irq_cfg
    3145728 CALNDATA cpu_data
    2101248 BSS irq_lists
    2097152 RMDATATA cpu_sibling_map
    2097152 RMDATATA cpu_core_map
    1575936 BSS irq_2_pin
    1050624 BSS irq_timer_state
    614400 INITDATA early_node_map
    525376 PERCPU per_cpu__kstat
    524608 DATA unix_proto
    524608 DATA udpv6_prot
    524608 DATA udplitev6_prot
    524608 DATA udplite_prot
    524608 DATA udp_prot
    524608 DATA tcpv6_prot
    524608 DATA tcp_prot
    524608 DATA rawv6_prot
    524608 DATA raw_prot
    524608 DATA packet_proto
    524608 DATA netlink_proto
    524288 BSS cpu_devices
    524288 BSS boot_pageset
    524288 CALNDATA boot_cpu_pda
    262144 RMDATATA node_to_cpumask
    262144 BSS __log_buf
    131072 BSS entries

    cpu_sibling_map and cpu_core_map have been taken care of in
    a prior patch. This patch deals with the cpu_data array of
    cpuinfo_x86 structs. The model that was used in sparc64
    architecture was adopted for x86.

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      Last update: 2007-09-24 23:11    [W:0.041 / U:20.316 seconds]
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