From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@lists.01.org
Subject: [PATCH] libnvdimm: debug probe times
Date: Fri, 01 Jun 2018 14:12:52 -0700 [thread overview]
Message-ID: <152788757290.17184.15378156389453066118.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
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>
---
drivers/nvdimm/bus.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
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)
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reply other threads:[~2018-06-01 21:22 UTC|newest]
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