[driver-core PATCH v8 7/9] driver core: Attach devices on CPU local to device node
From: Alexander Duyck
Date: Wed Dec 05 2018 - 12:25:54 EST
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@xxxxxxxxx>
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxxxxxxxx>
---
drivers/base/dd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index b731741059cb..49096adf96a1 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -833,7 +833,7 @@ 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);
}
@@ -993,7 +993,7 @@ 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;