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Commit 3f46833d authored by Dan Williams's avatar Dan Williams
Browse files

libnvdimm: Debug probe times 



Instrument nvdimm_bus_probe() to emit timestamps for the start and end
of libnvdimm device probing. This is useful for identifying sources of
libnvdimm sub-system initialization latency.

Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 254a4cd5

drivers/nvdimm/bus.c

+4 −1
Original line number Original line Diff line number Diff line
@@ -100,6 +100,9 @@ static int nvdimm_bus_probe(struct device *dev) 
	if (!try_module_get(provider))

	if (!try_module_get(provider))

		return -ENXIO;

		return -ENXIO;





	dev_dbg(&nvdimm_bus->dev, "START: %s.probe(%s)\n",

			dev->driver->name, dev_name(dev));



	nvdimm_bus_probe_start(nvdimm_bus);

	nvdimm_bus_probe_start(nvdimm_bus);

	rc = nd_drv->probe(dev);

	rc = nd_drv->probe(dev);

	if (rc == 0)

	if (rc == 0)
@@ -108,7 +111,7 @@ static int nvdimm_bus_probe(struct device *dev) 
		nd_region_disable(nvdimm_bus, dev);

		nd_region_disable(nvdimm_bus, dev);

	nvdimm_bus_probe_end(nvdimm_bus);

	nvdimm_bus_probe_end(nvdimm_bus);





	dev_dbg(&nvdimm_bus->dev, "%s.probe(%s) = %d\n", dev->driver->name,

	dev_dbg(&nvdimm_bus->dev, "END: %s.probe(%s) = %d\n", dev->driver->name,

			dev_name(dev), rc);

			dev_name(dev), rc);





	if (rc != 0)

	if (rc != 0)