lkml.org 
[lkml]   [2018]   [Dec]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[driver-core PATCH v9 6/9] driver core: Attach devices on CPU local to device node
From
Date
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(-)

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 3353f654861b..be9040db8321 100644
--- 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;
\
 
 \ /
  Last update: 2018-12-13 01:46    [W:0.113 / U:0.828 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site