tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
+4
-1
+4
-1
drivers/nvdimm/bus.c
+4
-1
drivers/nvdimm/bus.c
···
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if (!try_module_get(provider))
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return -ENXIO;
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+
dev_dbg(&nvdimm_bus->dev, "START: %s.probe(%s)\n",
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+
dev->driver->name, dev_name(dev));
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+
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nvdimm_bus_probe_start(nvdimm_bus);
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rc = nd_drv->probe(dev);
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if (rc == 0)
···
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nd_region_disable(nvdimm_bus, dev);
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nvdimm_bus_probe_end(nvdimm_bus);
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-
dev_dbg(&nvdimm_bus->dev, "%s.probe(%s) = %d\n", dev->driver->name,
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+
dev_dbg(&nvdimm_bus->dev, "END: %s.probe(%s) = %d\n", dev->driver->name,
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dev_name(dev), rc);
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if (rc != 0)