Re: Test fail

["Gábor Boskovits" <boskovits@gmail.com>]

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2018-03-29 14:46 GMT+02:00 Maria Sidorova <hydromasha@gmail.com>:

>
>
> On 29.03.2018 09:17, Gábor Boskovits wrote:
>
>> 2018-03-28 15:51 GMT+02:00 Gábor Boskovits <boskovits@gmail.com <mailto:
>> boskovits@gmail.com>>:
>>
>>     2018-03-28 8:36 GMT+02:00 Maria Sidorova <hydromasha@gmail.com
>>     <mailto:hydromasha@gmail.com>>:
>>
>>
>>
>>         On 28.03.2018 09:33, Gábor Boskovits wrote:
>>
>>             2018-03-27 23:34 GMT+02:00 Maria Sidorova
>>             <hydromasha@gmail.com <mailto:hydromasha@gmail.com>
>>             <mailto:hydromasha@gmail.com <mailto:hydromasha@gmail.com>>>:
>>
>>
>>
>>                  Hello,
>>
>>                  Running the test suite (`make check`) gives me one of
>>             the tests failed.
>>
>>                  This is from test-suite.log
>>
>>                  test-name: pivot-root
>>                  location: /home/masha/src/guix/tests/syscalls.scm:156
>>                  source:
>>                  + (test-equal
>>                  +   "pivot-root"
>>                  +   #t
>>                  +   (match (pipe)
>>                  +          ((in . out)
>>                  +           (match (clone (logior CLONE_NEWUSER
>>             CLONE_NEWNS SIGCHLD))
>>                  +                  (0
>>                  +                   (dynamic-wind
>>                  +                     (const #t)
>>                  +                     (lambda ()
>>                  +                       (close in)
>>                  +                       (call-with-temporary-directory
>>                  +                         (lambda (root)
>>                  +                           (let ((put-old
>>             (string-append root
>>                  "/real-root")))
>>                  +                             (mount "none" root "tmpfs")
>>                  +                             (mkdir put-old)
>>                  +                             (call-with-output-file
>>                  +                               (string-append root
>>             "/test")
>>                  +                               (lambda (port) (display
>>             "testing\n"
>>                  port)))
>>                  +                             (pivot-root root put-old)
>>                  +                             (write (file-exists?
>>             "/test") out)
>>                  +                             (close out)))))
>>                  +                     (lambda () (primitive-exit 0))))
>>                  +                  (pid (close out)
>>                  +                       (let ((result (read in)))
>>                  +                         (close in)
>>                  +                         (and (zero? (match (waitpid
>> pid)
>>                  +                                            ((_ .
>> status)
>>                  +
>>  (status:exit-val
>>                  status))))
>>                  +                              (eq? #t result))))))))
>>                  expected-value: #t
>>                  actual-value: #f
>>                  result: FAIL
>>
>>
>>                  The summary is:
>>                  # TOTAL: 777
>>                  # PASS:  772
>>                  # SKIP:  4
>>                  # XFAIL: 0
>>                  # FAIL:  1
>>                  # XPASS: 0
>>                  # ERROR: 0
>>
>>                  I'm novice in Guix, can anyone give me a clue?
>>
>>
>>     Actually there are two possibilities. I'm trying to narrow this down
>>     now.
>>     There is a bug:https://bugzilla.kernel.org/show_bug.cgi?id=183461
>>     <https://bugzilla.kernel.org/show_bug.cgi?id=183461>
>>     in our bug tracker that might be affecting you, or the shared mounts
>>     I noticed much later. I'm going to investigate this and report back.
>>
>>
>> I've created a vm image with a current Ubuntu 16.04 yesterday, installed
>> the guix binary tarball, and did a make check in a guix environment guix.
>> This error was not shown in my case.
>>
>> My uname -r is:
>>   4.10.0-28-generic
>>
>> This test should be skipped, if kernel version > 4.7.5.
>> Can you please send the output of uname -r ?
>>
>
> 4.4.0-116-generic
>

Ok, this is a known linux kernel bug, that entered the upstream linux
kernel with version 4.7.5.
Ubuntu backported the commit causing this behaviour to 4.4.0. This is
actually safe to ignore,
Do you see problems related to pivot_root anywhere else than this test?

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