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authorDan Williams <dan.j.williams@intel.com>2018-06-01 14:10:58 -0700
committerDan Williams <dan.j.williams@intel.com>2018-06-02 17:05:43 -0700
commit3f46833df94eec3b7057181898e02cb9e4a49074 (patch)
treeeb0300141a8e1635af137b2de40010d16f71b6a2 /drivers/nvdimm
parent254a4cd50b9fe2291a12b8902e08e56dcc4e9b10 (diff)
downloadlinux-3f46833df94eec3b7057181898e02cb9e4a49074.tar.bz2
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: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/bus.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index b9e0d30e317a..27902a8799b1 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -100,6 +100,9 @@ static int nvdimm_bus_probe(struct device *dev)
if (!try_module_get(provider))
return -ENXIO;
+ dev_dbg(&nvdimm_bus->dev, "START: %s.probe(%s)\n",
+ dev->driver->name, dev_name(dev));
+
nvdimm_bus_probe_start(nvdimm_bus);
rc = nd_drv->probe(dev);
if (rc == 0)
@@ -108,7 +111,7 @@ static int nvdimm_bus_probe(struct device *dev)
nd_region_disable(nvdimm_bus, dev);
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);
if (rc != 0)