]> nv-tegra.nvidia Code Review - linux-2.6.git/commit
x86: Convert cpu_core_map to be a per cpu variable
authorMike Travis <travis@sgi.com>
Tue, 16 Oct 2007 08:24:04 +0000 (01:24 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 16 Oct 2007 16:42:50 +0000 (09:42 -0700)
commit083576112940fda783d716fd5ccc744f81667b2f
tree226139e7cb9863c91d1e2a1ac0babb0db94f3d11
parentcc84634f29d5a92932400a2d52ca17dee2c8a462
x86: Convert cpu_core_map to be a per cpu variable

This is from an earlier message from 'Christoph Lameter':

    cpu_core_map is currently an array defined using NR_CPUS. This means that
    we overallocate since we will rarely really use maximum configured cpu.

    If we put the cpu_core_map into the per cpu area then it will be allocated
    for each processor as it comes online.

    This means that the core map cannot be accessed until the per cpu area
    has been allocated. Xen does a weird thing here looping over all processors
    and zeroing the masks that are not yet allocated and that will be zeroed
    when they are allocated. I commented the code out.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
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: Linus Torvalds <torvalds@linux-foundation.org>
12 files changed:
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
arch/x86/kernel/cpu/cpufreq/powernow-k8.c
arch/x86/kernel/cpu/proc.c
arch/x86/kernel/mce_amd_64.c
arch/x86/kernel/setup_64.c
arch/x86/kernel/smpboot_32.c
arch/x86/kernel/smpboot_64.c
arch/x86/xen/smp.c
include/asm-x86/smp_32.h
include/asm-x86/smp_64.h
include/asm-x86/topology_32.h
include/asm-x86/topology_64.h