linux-kernel - Re: ndctl tests usable?

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Date:   Tue, 26 Apr 2022 08:51:25 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Michal Suchánek <msuchanek@...e.de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux NVDIMM <nvdimm@...ts.linux.dev>
Subject: Re: ndctl tests usable?

On Tue, Apr 26, 2022 at 5:39 AM Michal Suchánek <msuchanek@...e.de> wrote:
>
> Hello,
>
> there is some testsuite included with ndctl, and when following the
> instructions to build it most tests fail or are skipped:
>
> [   95s] Ok:                 3
> [   95s] Expected Fail:      0
> [   95s] Fail:               5
> [   95s] Unexpected Pass:    0
> [   95s] Skipped:            15
> [   95s] Timeout:            0
>
> Is this the expected outcome or is this a problem with the ndctl build?
>
> Attaching test run log.

I see a few missing prerequisites:

[   78s] /usr/src/packages/BUILD/ndctl-73/test/pmem-errors.sh: line
64: mkfs.ext4: command not found
[   95s] /usr/src/packages/BUILD/ndctl-73/test/security.sh: line 25:
jq: command not found

This report:

[   51s]  1/23 ndctl:ndctl / libndctl               SKIP
0.02s   exit status 77

...seems to indicate that the nfit_test modules did not appear to load
correctly. I never expected that the nfit_test modules would be
redistributable, so I was surprised to see them being installed by an
actual package "nfit_test-kmp-default-0_k5.17.4_1-6.1". The reason
they are not redistributable is because they require replacing the
production build of the kernel provided modules libnvdimm.ko,
nd_pmem.ko, etc... What I expect is happening is that the production
version of libnvdimm.ko is already loaded (or is the only one on the
system), and ndctl_test_init()
(https://github.com/pmem/ndctl/blob/main/test/core.c#L110) detects
that case and skips the tests.

This is what I see with my setup that uses the sequence below to
install nfit_test and friends:

Test summary:
Ok:                 35
Expected Fail:      0
Fail:               1
Unexpected Pass:    0
Skipped:            1
Timeout:            0

Install procedure from a kernel build directory:
        export INSTALL_MOD_PATH=$root
        make INSTALL_HDR_PATH=$root/usr headers_install
        make M=tools/testing/nvdimm modules_install
        make M=tools/testing/cxl modules_install
        make modules_install