driver core: Attach devices on CPU local to device node

Call the asynchronous probe routines on a CPU local to the device node. By
doing this we should be able to improve our initialization time
significantly as we can avoid having to access the device from a remote
node which may introduce higher latency.

For example, in the case of initializing memory for NVDIMM this can have a
significant impact as initialing 3TB on remote node can take up to 39
seconds while initialing it on a local node only takes 23 seconds. It is
situations like this where we will see the biggest improvement.

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 627ad05064e07667590620630eefd03b3b779509..aa6a9c613595f67c01cae3efccc9a42d68906a90 100644 (file)
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -829,7 +829,7 @@ static int __device_attach(struct device *dev, bool allow_async)
                         */
                        dev_dbg(dev, "scheduling asynchronous probe\n");
                        get_device(dev);
-                       async_schedule(__device_attach_async_helper, dev);
+                       async_schedule_dev(__device_attach_async_helper, dev);
                } else {
                        pm_request_idle(dev);
                }
@@ -989,7 +989,7 @@ static int __driver_attach(struct device *dev, void *data)
                if (!dev->driver) {
                        get_device(dev);
                        dev->p->async_driver = drv;
-                       async_schedule(__driver_attach_async_helper, dev);
+                       async_schedule_dev(__driver_attach_async_helper, dev);
                }
                device_unlock(dev);
                return 0;