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[Jürg Häfliger <1866323@xxxxxxxxxxxxxxxxxx>]

** Tags added: kernel-daily-bug

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https://bugs.launchpad.net/bugs/1866323

Title:
  btrfs fill_fs test in fallocate06 from ubuntu_ltp_syscalls failed

Status in ubuntu-kernel-tests:
  Triaged
Status in linux package in Ubuntu:
  Incomplete
Status in linux-oem-5.6 package in Ubuntu:
  Invalid
Status in linux source package in Bionic:
  Confirmed
Status in linux-oem-5.6 source package in Bionic:
  Confirmed
Status in linux source package in Focal:
  Fix Released
Status in linux-oem-5.6 source package in Focal:
  Confirmed

Bug description:
  Test failure in fallocate06 was composed by two issues, one is xfs
  fill_fs test issue addressed in bug 1865967.

  Another is this one, this is the case 2 of btrfs (fill_fs):

  tst_test.c:1290: INFO: Testing on btrfs
  tst_mkfs.c:90: INFO: Formatting /dev/loop1 with btrfs opts='' extra opts=''
  tst_test.c:1229: INFO: Timeout per run is 0h 05m 00s
  fallocate06.c:117: INFO: Copy-on-write is supported
  fallocate06.c:168: INFO: Case 1. Fill FS: no; Use copy on write: no
  fallocate06.c:157: PASS: write() successful
  fallocate06.c:201: PASS: Misaligned allocation works as expected
  fallocate06.c:157: PASS: fallocate(FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE) successful
  fallocate06.c:237: PASS: fallocate(FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE) cleared the correct file range
  fallocate06.c:168: INFO: Case 2. Fill FS: yes; Use copy on write: no
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file0 size 21710183
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file1 size 8070086
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file2 size 3971177
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file3 size 36915315
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file4 size 70310993
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file5 size 4807935
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file6 size 90739786
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file7 size 76896492
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file8 size 72228649
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file9 size 36207821
  tst_fill_fs.c:32: INFO: Creating file mntpoint/file10 size 81483962
  tst_fill_fs.c:59: INFO: write(): ENOSPC (28)
  fallocate06.c:157: PASS: write() successful
  fallocate06.c:201: PASS: Misaligned allocation works as expected
  fallocate06.c:146: FAIL: fallocate(FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE) failed unexpectedly: ENOSPC (2

  This issue can be found from X to F
  X - https://pastebin.ubuntu.com/p/9FfVrZkQN8/
  B - https://pastebin.ubuntu.com/p/Zc9TW4sQKF/
  D - https://pastebin.ubuntu.com/p/cryTnnn5wF/
  E - https://pastebin.ubuntu.com/p/FXTZpsX7Qb/
  F - https://pastebin.ubuntu.com/p/FKPJKCS2zr/

  Note that the hint printed in the test:
    HINT: You _MAY_ be missing kernel fixes, see:
   
   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e093c4be760e

  It something that will get printed after the test, as it's for XFS so
  it has nothing to do with this issue here.

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