lkml.org 
[lkml]   [2015]   [Jun]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v6 1/3] cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug_disable
    Date
    Hyper-V module needs to disable cpu hotplug (offlining) as there is no
    support from hypervisor side to reassing already opened event channels
    to a different CPU. Currently it is been done by altering
    smp_ops.cpu_disable but it is hackish.

    Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
    ---
    kernel/cpu.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/kernel/cpu.c b/kernel/cpu.c
    index 94bbe46..dc005e7 100644
    --- a/kernel/cpu.c
    +++ b/kernel/cpu.c
    @@ -193,6 +193,7 @@ void cpu_hotplug_disable(void)
    cpu_hotplug_disabled = 1;
    cpu_maps_update_done();
    }
    +EXPORT_SYMBOL_GPL(cpu_hotplug_disable);

    void cpu_hotplug_enable(void)
    {
    @@ -200,7 +201,7 @@ void cpu_hotplug_enable(void)
    cpu_hotplug_disabled = 0;
    cpu_maps_update_done();
    }
    -
    +EXPORT_SYMBOL_GPL(cpu_hotplug_enable);
    #endif /* CONFIG_HOTPLUG_CPU */

    /* Need to know about CPUs going up/down? */
    --
    2.4.3


    \
     
     \ /
      Last update: 2015-06-26 16:21    [W:4.072 / U:0.056 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site