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[Launchpad Bug Tracker <1934910@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package zfs-linux - 2.0.3-8ubuntu5

---------------
zfs-linux (2.0.3-8ubuntu5) impish; urgency=medium

  * Improve scrub testing in kernel-smoke-test-scrub (LP: #1934910)
    On some slower small memory systems we need to check until resilvering
    has completed. The most reliably method is to poll on a scrub until
    it finishes successfully. Give up after ~10 minutes and flag a failure
    if the scrub can't start or complete successfully.

 -- Colin Ian King <colin.king@xxxxxxxxxxxxx>  Thu, 8 Jul 2021 08:51:21
+0100

** Changed in: zfs-linux (Ubuntu Impish)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1934910

Title:
  zfs-linux/0.7.5-1ubuntu16.11 ADT test failure with linux-
  hwe-5.4/5.4.0-79.88~18.04.1

Status in linux-hwe-5.4 package in Ubuntu:
  New
Status in zfs-linux package in Ubuntu:
  Fix Released
Status in zfs-linux source package in Xenial:
  In Progress
Status in linux-hwe-5.4 source package in Bionic:
  New
Status in zfs-linux source package in Bionic:
  In Progress
Status in zfs-linux source package in Focal:
  In Progress
Status in zfs-linux source package in Groovy:
  In Progress
Status in zfs-linux source package in Hirsute:
  In Progress
Status in zfs-linux source package in Impish:
  Fix Released

Bug description:
  == zfs-linux SRU ==

  IMPISH, HIRSUTE, GROOVY, FOCAL, BIONIC, XENIAL

  [Impact]

  The zfs debian scrub test sometimes times out on slower test systems
  because scrub can take a while to complete and the scrub test can
  time out.  The test needs some more intelligence to detect this
  and a longer time out for slower systems.

  The fix now polls the scrub completion more thoroughly and increases
  timeout to 15 minutes.

  [Test Plan]

  Run the test with autopkgtest on slow file systems. With the fix the test
  has longer timeout and will pass rather than fail with a timeout. e.g.

  autopkgtest zfs-linux_2.0.3-8ubuntu5.dsc -- null

  
  [Where problems could occur]

  The timeout is hard coded to 15 minutes. This should be enough for slow
  devices with the small ZFS volume set used by this test. However, it may
  still fail if the backing store is really slow. However, we don't want the
  test to be blocked indefinitely waiting for a timeout, so a 15 minute
  scrub timeout seems to be long enough to be more than reasonable. Any longer and it's highly likely that the scrub has hung.

  [Other Info]

  This test is almost identical to the same scrub test run from the kernel
  team autotest zfs smoke test, so it has been exercised regularly and is
  known to reliably.

  -------------------------------------------------------------------------

  
  This is a scripted bug report about ADT failures while running zfs-linux tests for linux-hwe-5.4/5.4.0-79.88~18.04.1 on bionic. Whether this is caused by the dep8 tests of the tested source or the kernel has yet to be determined.

  Testing failed on:
      amd64: https://autopkgtest.ubuntu.com/results/autopkgtest-bionic/bionic/amd64/z/zfs-linux/20210703_080055_ead94@/log.gz
      arm64: https://autopkgtest.ubuntu.com/results/autopkgtest-bionic/bionic/arm64/z/zfs-linux/20210703_075255_bdb56@/log.gz
      ppc64el: https://autopkgtest.ubuntu.com/results/autopkgtest-bionic/bionic/ppc64el/z/zfs-linux/20210703_074629_bdb56@/log.gz
      s390x: https://autopkgtest.ubuntu.com/results/autopkgtest-bionic/bionic/s390x/z/zfs-linux/20210703_074343_3aa5c@/log.gz

  This is a similar issue as reported on bug 1885289, which was fixed on
  autotest-client-tests ubuntu_zfs_smoke_test. However, the ADT tests
  don't use autotest, the test script run comes from the zfs-linux dkms
  source package, debian/tests/kernel-smoke-test-scrub.

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