Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 6e6fcbc27e7788af54139c53537395d95560f2ef ("blk-mq: support batching dispatch in case of io") https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git for-5.9/drivers in testcase: ltp with following parameters: disk: 1HDD fs: ext4 test: fs-03 test-description: The LTP testsuite contains a collection of tools for testing the Linux kernel and related features. test-url: http://linux-test-project.github.io/ on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot <<>> tag=fs_fill stime=1595659069 cmdline="fs_fill" contacts="" analysis=exit <<>> tst_device.c:89: INFO: Found free device 0 '/dev/loop0' tst_supported_fs_types.c:60: INFO: Kernel supports ext2 tst_supported_fs_types.c:44: INFO: mkfs.ext2 does exist tst_supported_fs_types.c:60: INFO: Kernel supports ext3 tst_supported_fs_types.c:44: INFO: mkfs.ext3 does exist tst_supported_fs_types.c:60: INFO: Kernel supports ext4 tst_supported_fs_types.c:44: INFO: mkfs.ext4 does exist tst_supported_fs_types.c:60: INFO: Kernel supports xfs tst_supported_fs_types.c:44: INFO: mkfs.xfs does exist tst_supported_fs_types.c:60: INFO: Kernel supports btrfs tst_supported_fs_types.c:44: INFO: mkfs.btrfs does exist tst_supported_fs_types.c:60: INFO: Kernel supports vfat tst_supported_fs_types.c:44: INFO: mkfs.vfat does exist tst_supported_fs_types.c:83: INFO: Filesystem exfat is not supported tst_supported_fs_types.c:92: INFO: FUSE does support ntfs tst_supported_fs_types.c:44: INFO: mkfs.ntfs does exist tst_test.c:1308: INFO: Testing on ext2 tst_mkfs.c:90: INFO: Formatting /dev/loop0 with ext2 opts='' extra opts='' mke2fs 1.44.5 (15-Dec-2018) tst_test.c:1247: INFO: Timeout per run is 0h 05m 00s fs_fill.c:103: INFO: Running 10 writer threads tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file0 fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread6/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file0 fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file0 fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file0 fs_fill.c:87: PASS: Got 10 ENOSPC runtime 1194ms tst_test.c:1308: INFO: Testing on ext3 tst_mkfs.c:90: INFO: Formatting /dev/loop0 with ext3 opts='' extra opts='' mke2fs 1.44.5 (15-Dec-2018) tst_test.c:1247: INFO: Timeout per run is 0h 05m 00s fs_fill.c:103: INFO: Running 10 writer threads tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file0 fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread6/file14 fs_fill.c:87: PASS: Got 17 ENOSPC runtime 1000ms tst_test.c:1308: INFO: Testing on ext4 tst_mkfs.c:90: INFO: Formatting /dev/loop0 with ext4 opts='' extra opts='' mke2fs 1.44.5 (15-Dec-2018) tst_test.c:1247: INFO: Timeout per run is 0h 05m 00s fs_fill.c:103: INFO: Running 10 writer threads tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file0 fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file0 fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread6/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file0 fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file1 fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file1 fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread6/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file0 fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file3 fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread6/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file6 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread6/file6 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file1 fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file6 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file1 fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file6 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread6/file4 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file3 fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file3 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file3 fs_fill.c:87: PASS: Got 73 ENOSPC runtime 1000ms tst_test.c:1308: INFO: Testing on xfs tst_mkfs.c:90: INFO: Formatting /dev/loop0 with xfs opts='' extra opts='' tst_test.c:1247: INFO: Timeout per run is 0h 05m 00s fs_fill.c:103: INFO: Running 10 writer threads tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file0 tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file0 tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file0 tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread6/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file0 fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file2 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file1 tst_fill_fs.c:39: INFO: open(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread6/file1 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file0 tst_fill_fs.c:39: INFO: open(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file1 tst_fill_fs.c:39: INFO: open(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file2 fs_fill.c:87: PASS: Got 111 ENOSPC runtime 566ms tst_test.c:1308: INFO: Testing on btrfs tst_mkfs.c:90: INFO: Formatting /dev/loop0 with btrfs opts='' extra opts='' tst_test.c:1247: INFO: Timeout per run is 0h 05m 00s fs_fill.c:103: INFO: Running 10 writer threads tst_fill_fs.c:39: INFO: open(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread1/file0 tst_fill_fs.c:39: INFO: open(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread5/file0 tst_fill_fs.c:39: INFO: open(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread2/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread4/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread7/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread10/file0 tst_fill_fs.c:39: INFO: open(): ENOSPC (28) tst_fill_fs.c:39: INFO: open(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread3/file0 fs_fill.c:53: INFO: Unlinking mntpoint/thread9/file0 tst_fill_fs.c:39: INFO: open(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread6/file0 tst_fill_fs.c:59: INFO: write(): ENOSPC (28) fs_fill.c:53: INFO: Unlinking mntpoint/thread8/file0 fs_fill.c:87: PASS: Got 10 ENOSPC runtime 9454ms tst_test.c:1308: INFO: Testing on vfat tst_mkfs.c:90: INFO: Formatting /dev/loop0 with vfat opts='' extra opts='' tst_test.c:1247: INFO: Timeout per run is 0h 05m 00s fs_fill.c:103: INFO: Running 10 writer threads Test timeouted, sending SIGKILL! Test timeouted, sending SIGKILL! Test timeouted, sending SIGKILL! Test timeouted, sending SIGKILL! Test timeouted, sending SIGKILL! Test timeouted, sending SIGKILL! Test timeouted, sending SIGKILL! Test timeouted, sending SIGKILL! Test timeouted, sending SIGKILL! Test timeouted, sending SIGKILL! Test timeouted, sending SIGKILL! Cannot kill test processes! Congratulation, likely test hit a kernel bug. Exitting uncleanly... <<>> initiation_status="ok" duration=385 termination_type=exited termination_id=1 corefile=no cutime=53 cstime=1400 <<>> To reproduce: # build kernel cd linux cp config-5.8.0-rc2-00057-g6e6fcbc27e7788 .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 INSTALL_MOD_PATH= modules_install cd find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k -m modules.cgz job-script # job-script is attached in this email Thanks, Rong Chen