• Tejun Heo's avatar
    x86: Unify CPU -> NUMA node mapping between 32 and 64bit · 645a7919
    Tejun Heo authored
    Unlike 64bit, 32bit has been using its own cpu_to_node_map[] for
    CPU -> NUMA node mapping.  Replace it with early_percpu variable
    x86_cpu_to_node_map and share the mapping code with 64bit.
    
    * USE_PERCPU_NUMA_NODE_ID is now enabled for 32bit too.
    
    * x86_cpu_to_node_map and numa_set/clear_node() are moved from
      numa_64 to numa.  For now, on 32bit, x86_cpu_to_node_map is initialized
      with 0 instead of NUMA_NO_NODE.  This is to avoid introducing unexpected
      behavior change and will be updated once init path is unified.
    
    * srat_detect_node() is now enabled for x86_32 too.  It calls
      numa_set_node() and initializes the mapping making explicit
      cpu_to_node_map[] updates from map/unmap_cpu_to_node() unnecessary.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Cc: eric.dumazet@gmail.com
    Cc: yinghai@kernel.org
    Cc: brgerst@gmail.com
    Cc: gorcunov@gmail.com
    Cc: penberg@kernel.org
    Cc: shaohui.zheng@intel.com
    Cc: rientjes@google.com
    LKML-Reference: <1295789862-25482-15-git-send-email-tj@kernel.org>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    Cc: David Rientjes <rientjes@google.com>
    645a7919
intel.c 13.3 KB