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[Bug 2051324] Re: zram01 from ubuntu_ltp_kernel_misc failed with: TBROK: "check_read_mem_used_total /sys/block/zram5/mm_stat" timed out

To: canonical-ubuntu-qa@xxxxxxxxxxxxxxxxxxx
From: Po-Hsu Lin <2051324@xxxxxxxxxxxxxxxxxx>
Date: Fri, 26 Jan 2024 05:45:56 -0000
Reply-to: Bug 2051324 <2051324@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
** Description changed:

- Issue found with 5.15.0-94.104~20.04.1 generic-64k openstack ARM64
- instance.
+ This new check_read_mem_used_total() is added in recent LTP update
+ [1][2]
  
- This is not a new bug, it's just we are re-using bug 1949617 for zram01 timeout issue, but that one is for specific bare-metal instance. Thus I am opening this for the check_read_mem_used_to time out issue:
-   TBROK: "check_read_mem_used_total /sys/block/zram5/mm_stat" timed out
- 
+ Issue found with 5.15.0-94.104~20.04.1 generic-64k openstack ARM64 instance. The test is failing with:
+   TBROK: "check_read_mem_used_total /sys/block/zram5/mm_stat" timed out
  
  Test log:
  INFO: Test start time: Fri Jan 26 02:53:32 UTC 2024
  COMMAND:    /opt/ltp/bin/ltp-pan -q  -e -S   -a 52810     -n 52810  -f /tmp/ltp-Sc89sRvhcZ/alltests -l /dev/null  -C /dev/null -T /dev/null
  LOG File: /dev/null
  FAILED COMMAND File: /dev/null
  TCONF COMMAND File: /dev/null
  Running tests.......
  zram01 1 TINFO: timeout per run is 0h 5m 0s
  tst_supported_fs_types.c:89: TINFO: Kernel supports ext2
  tst_supported_fs_types.c:54: TINFO: mkfs.ext2 does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports ext3
  tst_supported_fs_types.c:54: TINFO: mkfs.ext3 does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports ext4
  tst_supported_fs_types.c:54: TINFO: mkfs.ext4 does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports xfs
  tst_supported_fs_types.c:54: TINFO: mkfs.xfs does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports btrfs
  tst_supported_fs_types.c:54: TINFO: mkfs.btrfs does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports vfat
  tst_supported_fs_types.c:54: TINFO: mkfs.vfat does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports exfat
  tst_supported_fs_types.c:50: TINFO: mkfs.exfat does not exist
  tst_supported_fs_types.c:156: TINFO: Skipping tmpfs as requested by the test
  zram01 1 TINFO: timeout per run is 0h 45m 0s
  zram01 1 TINFO: create '6' zram device(s)
  zram01 1 TPASS: all zram devices (/dev/zram0~5) successfully created
  zram01 1 TCONF: The device attribute max_comp_streams was introduced in kernel 3.15 and deprecated in 4.7
  zram01 2 TINFO: test that we can set compression algorithm
- zram01 2 TINFO: supported algs: lzo lzo-rle lz4 lz4hc 842 zstd 
+ zram01 2 TINFO: supported algs: lzo lzo-rle lz4 lz4hc 842 zstd
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = 'zstd'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = 'zstd'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = 'zstd'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = 'zstd'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = 'zstd'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = 'zstd'
  zram01 2 TPASS: test succeeded
  zram01 3 TINFO: set disk size to zram device(s)
  zram01 3 TINFO: /sys/block/zram0/disksize = '26214400'
  zram01 3 TINFO: /sys/block/zram1/disksize = '26214400'
  zram01 3 TINFO: /sys/block/zram2/disksize = '26214400'
  zram01 3 TINFO: /sys/block/zram3/disksize = '314572800'
  zram01 3 TINFO: /sys/block/zram4/disksize = '402653184'
  zram01 3 TINFO: /sys/block/zram5/disksize = '26214400'
  zram01 3 TPASS: test succeeded
  zram01 4 TINFO: set memory limit to zram device(s)
  zram01 4 TINFO: /sys/block/zram0/mem_limit = '25M'
  zram01 4 TINFO: /sys/block/zram1/mem_limit = '25M'
  zram01 4 TINFO: /sys/block/zram2/mem_limit = '25M'
  zram01 4 TINFO: /sys/block/zram3/mem_limit = '300M'
  zram01 4 TINFO: /sys/block/zram4/mem_limit = '384M'
  zram01 4 TINFO: /sys/block/zram5/mem_limit = '25M'
  zram01 4 TPASS: test succeeded
  zram01 5 TINFO: make ext2 filesystem on /dev/zram0
  zram01 5 TINFO: make ext3 filesystem on /dev/zram1
  zram01 5 TINFO: make ext4 filesystem on /dev/zram2
  zram01 5 TINFO: make xfs filesystem on /dev/zram3
  zram01 5 TINFO: make btrfs filesystem on /dev/zram4
  zram01 5 TINFO: make vfat filesystem on /dev/zram5
  zram01 5 TPASS: zram_makefs succeeded
  zram01 6 TINFO: mount /dev/zram0
  zram01 6 TINFO: mount /dev/zram1
  zram01 6 TINFO: mount /dev/zram2
  zram01 6 TINFO: mount /dev/zram3
  zram01 6 TINFO: mount /dev/zram4
  zram01 6 TINFO: mount /dev/zram5
  zram01 6 TPASS: mount of zram device(s) succeeded
  zram01 7 TINFO: filling zram0 (it can take long time)
  zram01 7 TPASS: zram0 was filled with '24724' KB
  zram01 7 TINFO: /sys/block/zram0/mm_stat
  20447232     6553   655360 26214400   655360      305        0        0        0
  zram01 7 TINFO: mem_used_total: 655360
  zram01 7 TPASS: compression ratio: 38.63:1
  zram01 7 TINFO: filling zram1 (it can take long time)
  zram01 7 TPASS: zram1 was filled with '20628' KB
  zram01 7 TINFO: /sys/block/zram1/mm_stat
  25493504    15275   327680 26214400   524288      385        0        0        0
  zram01 7 TINFO: mem_used_total: 327680
  zram01 7 TPASS: compression ratio: 64.46:1
  zram01 7 TINFO: filling zram2 (it can take long time)
  zram01 7 TPASS: zram2 was filled with '20140' KB
  zram01 7 TINFO: /sys/block/zram2/mm_stat
  25296896     1398   262144 26214400   262144      382        0        0        0
  zram01 7 TINFO: mem_used_total: 262144
  zram01 7 TPASS: compression ratio: 78.67:1
  zram01 7 TINFO: filling zram3 (it can take long time)
  zram01 7 TPASS: zram3 was filled with '284508' KB
  zram01 7 TINFO: /sys/block/zram3/mm_stat
  296878080    14438   458752 314572800   589824     4493        0        0        0
  zram01 7 TINFO: mem_used_total: 458752
  zram01 7 TPASS: compression ratio: 635.06:1
  zram01 7 TINFO: filling zram4 (it can take long time)
  zram01 7 TPASS: zram4 was filled with '330368' KB
  zram01 7 TINFO: /sys/block/zram4/mm_stat
  343015424    12093   262144 402653184   262144     5190        0        0        0
  zram01 7 TINFO: mem_used_total: 262144
  zram01 7 TPASS: compression ratio: 1290.50:1
  zram01 7 TINFO: filling zram5 (it can take long time)
  zram01 7 TPASS: zram5 was filled with '25568' KB
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TBROK: "check_read_mem_used_total /sys/block/zram5/mm_stat" timed out
  zram01 7 TINFO: AppArmor enabled, this may affect test results
  zram01 7 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root)
  zram01 7 TINFO: loaded AppArmor profiles: none
  
  Summary:
  passed   17
  failed   0
  broken   1
  skipped  1
  warnings 0
  INFO: ltp-pan reported some tests FAIL
  LTP Version: 20230929
  INFO: Test end time: Fri Jan 26 02:59:10 UTC 2024
+ 
+ [1] https://lists.ubuntu.com/archives/kernel-team/2023-December/147590.html
+ [2] 
+ https://github.com/linux-test-project/ltp/commit/f045fd1de6420cc6d7db2bda0cd86fb56ff5b1c1

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https://bugs.launchpad.net/bugs/2051324

Title:
  zram01 from ubuntu_ltp_kernel_misc failed with: TBROK:
  "check_read_mem_used_total /sys/block/zram5/mm_stat" timed out

Status in ubuntu-kernel-tests:
  New

Bug description:
  This new check_read_mem_used_total() is added in recent LTP update
  [1][2]

  Issue found with 5.15.0-94.104~20.04.1 generic-64k openstack ARM64 instance. The test is failing with:
    TBROK: "check_read_mem_used_total /sys/block/zram5/mm_stat" timed out

  Test log:
  INFO: Test start time: Fri Jan 26 02:53:32 UTC 2024
  COMMAND:    /opt/ltp/bin/ltp-pan -q  -e -S   -a 52810     -n 52810  -f /tmp/ltp-Sc89sRvhcZ/alltests -l /dev/null  -C /dev/null -T /dev/null
  LOG File: /dev/null
  FAILED COMMAND File: /dev/null
  TCONF COMMAND File: /dev/null
  Running tests.......
  zram01 1 TINFO: timeout per run is 0h 5m 0s
  tst_supported_fs_types.c:89: TINFO: Kernel supports ext2
  tst_supported_fs_types.c:54: TINFO: mkfs.ext2 does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports ext3
  tst_supported_fs_types.c:54: TINFO: mkfs.ext3 does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports ext4
  tst_supported_fs_types.c:54: TINFO: mkfs.ext4 does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports xfs
  tst_supported_fs_types.c:54: TINFO: mkfs.xfs does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports btrfs
  tst_supported_fs_types.c:54: TINFO: mkfs.btrfs does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports vfat
  tst_supported_fs_types.c:54: TINFO: mkfs.vfat does exist
  tst_supported_fs_types.c:89: TINFO: Kernel supports exfat
  tst_supported_fs_types.c:50: TINFO: mkfs.exfat does not exist
  tst_supported_fs_types.c:156: TINFO: Skipping tmpfs as requested by the test
  zram01 1 TINFO: timeout per run is 0h 45m 0s
  zram01 1 TINFO: create '6' zram device(s)
  zram01 1 TPASS: all zram devices (/dev/zram0~5) successfully created
  zram01 1 TCONF: The device attribute max_comp_streams was introduced in kernel 3.15 and deprecated in 4.7
  zram01 2 TINFO: test that we can set compression algorithm
  zram01 2 TINFO: supported algs: lzo lzo-rle lz4 lz4hc 842 zstd
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram0/comp_algorithm = 'zstd'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram1/comp_algorithm = 'zstd'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram2/comp_algorithm = 'zstd'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram3/comp_algorithm = 'zstd'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram4/comp_algorithm = 'zstd'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = 'lzo'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = 'lzo-rle'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = 'lz4'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = 'lz4hc'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = '842'
  zram01 2 TINFO: /sys/block/zram5/comp_algorithm = 'zstd'
  zram01 2 TPASS: test succeeded
  zram01 3 TINFO: set disk size to zram device(s)
  zram01 3 TINFO: /sys/block/zram0/disksize = '26214400'
  zram01 3 TINFO: /sys/block/zram1/disksize = '26214400'
  zram01 3 TINFO: /sys/block/zram2/disksize = '26214400'
  zram01 3 TINFO: /sys/block/zram3/disksize = '314572800'
  zram01 3 TINFO: /sys/block/zram4/disksize = '402653184'
  zram01 3 TINFO: /sys/block/zram5/disksize = '26214400'
  zram01 3 TPASS: test succeeded
  zram01 4 TINFO: set memory limit to zram device(s)
  zram01 4 TINFO: /sys/block/zram0/mem_limit = '25M'
  zram01 4 TINFO: /sys/block/zram1/mem_limit = '25M'
  zram01 4 TINFO: /sys/block/zram2/mem_limit = '25M'
  zram01 4 TINFO: /sys/block/zram3/mem_limit = '300M'
  zram01 4 TINFO: /sys/block/zram4/mem_limit = '384M'
  zram01 4 TINFO: /sys/block/zram5/mem_limit = '25M'
  zram01 4 TPASS: test succeeded
  zram01 5 TINFO: make ext2 filesystem on /dev/zram0
  zram01 5 TINFO: make ext3 filesystem on /dev/zram1
  zram01 5 TINFO: make ext4 filesystem on /dev/zram2
  zram01 5 TINFO: make xfs filesystem on /dev/zram3
  zram01 5 TINFO: make btrfs filesystem on /dev/zram4
  zram01 5 TINFO: make vfat filesystem on /dev/zram5
  zram01 5 TPASS: zram_makefs succeeded
  zram01 6 TINFO: mount /dev/zram0
  zram01 6 TINFO: mount /dev/zram1
  zram01 6 TINFO: mount /dev/zram2
  zram01 6 TINFO: mount /dev/zram3
  zram01 6 TINFO: mount /dev/zram4
  zram01 6 TINFO: mount /dev/zram5
  zram01 6 TPASS: mount of zram device(s) succeeded
  zram01 7 TINFO: filling zram0 (it can take long time)
  zram01 7 TPASS: zram0 was filled with '24724' KB
  zram01 7 TINFO: /sys/block/zram0/mm_stat
  20447232     6553   655360 26214400   655360      305        0        0        0
  zram01 7 TINFO: mem_used_total: 655360
  zram01 7 TPASS: compression ratio: 38.63:1
  zram01 7 TINFO: filling zram1 (it can take long time)
  zram01 7 TPASS: zram1 was filled with '20628' KB
  zram01 7 TINFO: /sys/block/zram1/mm_stat
  25493504    15275   327680 26214400   524288      385        0        0        0
  zram01 7 TINFO: mem_used_total: 327680
  zram01 7 TPASS: compression ratio: 64.46:1
  zram01 7 TINFO: filling zram2 (it can take long time)
  zram01 7 TPASS: zram2 was filled with '20140' KB
  zram01 7 TINFO: /sys/block/zram2/mm_stat
  25296896     1398   262144 26214400   262144      382        0        0        0
  zram01 7 TINFO: mem_used_total: 262144
  zram01 7 TPASS: compression ratio: 78.67:1
  zram01 7 TINFO: filling zram3 (it can take long time)
  zram01 7 TPASS: zram3 was filled with '284508' KB
  zram01 7 TINFO: /sys/block/zram3/mm_stat
  296878080    14438   458752 314572800   589824     4493        0        0        0
  zram01 7 TINFO: mem_used_total: 458752
  zram01 7 TPASS: compression ratio: 635.06:1
  zram01 7 TINFO: filling zram4 (it can take long time)
  zram01 7 TPASS: zram4 was filled with '330368' KB
  zram01 7 TINFO: /sys/block/zram4/mm_stat
  343015424    12093   262144 402653184   262144     5190        0        0        0
  zram01 7 TINFO: mem_used_total: 262144
  zram01 7 TPASS: compression ratio: 1290.50:1
  zram01 7 TINFO: filling zram5 (it can take long time)
  zram01 7 TPASS: zram5 was filled with '25568' KB
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TINFO: /sys/block/zram5/mm_stat
  11403264        0        0 26214400   196608      174        0        0        0
  zram01 7 TBROK: "check_read_mem_used_total /sys/block/zram5/mm_stat" timed out
  zram01 7 TINFO: AppArmor enabled, this may affect test results
  zram01 7 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root)
  zram01 7 TINFO: loaded AppArmor profiles: none

  Summary:
  passed   17
  failed   0
  broken   1
  skipped  1
  warnings 0
  INFO: ltp-pan reported some tests FAIL
  LTP Version: 20230929
  INFO: Test end time: Fri Jan 26 02:59:10 UTC 2024

  [1] https://lists.ubuntu.com/archives/kernel-team/2023-December/147590.html
  [2] 
  https://github.com/linux-test-project/ltp/commit/f045fd1de6420cc6d7db2bda0cd86fb56ff5b1c1

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References

[Bug 2051324] [NEW] zram01 from ubuntu_ltp_kernel_misc failed with: TBROK: "check_read_mem_used_total /sys/block/zram5/mm_stat" timed out
From: Po-Hsu Lin, 2024-01-26