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[driver-core,v7,7/9] driver core: Attach devices on CPU local to device node

Message ID 154345156222.18040.5612838924447370070.stgit@ahduyck-desk1.amr.corp.intel.com (mailing list archive)
State Superseded
Headers show
Series Add NUMA aware async_schedule calls | expand

Commit Message

Alexander Duyck Nov. 29, 2018, 12:32 a.m. UTC
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>
 drivers/base/dd.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 036c8ffa522f..b24a5473c968 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -853,7 +853,7 @@  static int __device_attach(struct device *dev, bool allow_async)
 			dev_dbg(dev, "scheduling asynchronous probe\n");
 			dev_set_drv_async(dev, NULL);
-			async_schedule(__device_attach_async_helper, dev);
+			async_schedule_dev(__device_attach_async_helper, dev);
 		} else {
@@ -1011,7 +1011,7 @@  static int __driver_attach(struct device *dev, void *data)
 		if (!dev->driver) {
 			dev_set_drv_async(dev, drv);
-			async_schedule(__driver_attach_async_helper, dev);
+			async_schedule_dev(__driver_attach_async_helper, dev);
 		return 0;