1. 22 Dec, 2009 1 commit
    • Andrew Morton's avatar
      arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts by... · 4a28395d
      Andrew Morton authored
      arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts by using smp_call_function_any()
      
      Presently acpi-cpufreq will perform the MSR read on the first CPU in the
      mask.  That's inefficient if that CPU differs from the current CPU.
      Because we have to perform a cross-CPU call, but we could have run the
      rdmsr on the current CPU.
      
      So switch to using the new smp_call_function_any(), which will perform the
      call on the current CPU if that CPU is present in the mask (it is).
      
      Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
      Cc: Dave Jones <davej@redhat.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Jaswinder Singh Rajput <jaswinder@kernel.org>
      Cc: Len Brown <len.brown@intel.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
      Cc: Zhao Yakui <yakui.zhao@intel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      4a28395d
  2. 18 Dec, 2009 9 commits
  3. 17 Dec, 2009 30 commits