• Dou Liyang's avatar
    x86/acpi: Restore the order of CPU IDs · 2b85b3d2
    Dou Liyang authored
    The following commits:
    
      f7c28833 ("x86/acpi: Enable acpi to register all possible cpus at
    boot time") and 8f54969d ("x86/acpi: Introduce persistent storage
    for cpuid <-> apicid mapping")
    
    ... registered all the possible CPUs at boot time via ACPI tables to
    make the mapping of cpuid <-> apicid fixed. Both enabled and disabled
    CPUs could have a logical CPU ID after boot time.
    
    But, ACPI tables are unreliable. the number amd order of Local APIC
    entries which depends on the firmware is often inconsistent with the
    physical devices. Even if they are consistent, The disabled CPUs which
    take up some logical CPU IDs will also make the order discontinuous.
    
    Revert the part of disabled CPUs registration, keep the allocation
    logic of logical CPU IDs and also keep some code location changes.
    Signed-off-by: default avatarDou Liyang <douly.fnst@cn.fujitsu.com>
    Tested-by: default avatarXiaolong Ye <xiaolong.ye@intel.com>
    Cc: rjw@rjwysocki.net
    Cc: linux-acpi@vger.kernel.org
    Cc: guzheng1@huawei.com
    Cc: izumi.taku@jp.fujitsu.com
    Cc: lenb@kernel.org
    Link: http://lkml.kernel.org/r/1488528147-2279-4-git-send-email-douly.fnst@cn.fujitsu.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    2b85b3d2
boot.c 41.7 KB