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installing-ndctl: fix formatting in the troubleshooting section #1

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Feb 22, 2019
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installing-ndctl: fix formatting in the troubleshooting section #1

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29 changes: 17 additions & 12 deletions getting-started-guide/installing-ndctl.md
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Original file line number Diff line number Diff line change
Expand Up @@ -241,20 +241,25 @@ The unit tests run by `make check` require the nfit\_test.ko module to be loaded

The unit tests will validate that the environment is set up correctly before they try to run. If the platform is misconfigured, i.e. the unit test modules are not available, or the test versions of the modules are superseded by the "in-tree/production" version of the modules `make check` will skip tests and report a message like the following in test/test-suite.log:

`SKIP: libndctl`
`==============`
`test/init: nfit_test_init: nfit.ko: appears to be production version: /lib/modules/4.8.8-200.fc24.x86_64/kernel/drivers/acpi/nfit/nfit.ko.xz`
`__ndctl_test_skip: explicit skip test_libndctl:2684`
`nfit_test unavailable skipping tests`
```text
SKIP: libndctl
==============
test/init: nfit_test_init: nfit.ko: appears to be production version: /lib/modules/4.8.8-200.fc24.x86_64/kernel/drivers/acpi/nfit/nfit.ko.xz
__ndctl_test_skip: explicit skip test_libndctl:2684
nfit_test unavailable skipping tests
```

If the unit test modules are indeed available in the modules 'extra' directory the default depmod policy can be overridden by adding a file to /etc/depmod.d with the following contents:
`override nfit * extra`
`override device_dax * extra` `override dax_pmem * extra`
`override libnvdimm * extra`
`override nd_blk * extra`
`override nd_btt * extra`
`override nd_e820 * extra`
`override nd_pmem * extra`
```text
override nfit * extra
override device_dax * extra
override dax_pmem * extra
override libnvdimm * extra
override nd_blk * extra
override nd_btt * extra
override nd_e820 * extra
override nd_pmem * extra
```

The nfit\_test module emulates pmem with memory allocated via vmalloc\(\). One of the side effects is that this breaks 'physically contiguous' assumptions in the driver. Use the `--align=4K` option to `ndctl create-namespace` to avoid these corner case scenarios.

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