Public bug reported: How to reproduce this issue:
Kernel: 6.11.0-7, AMD64 virtual machine, oracular, updated 16th Sept 2024 @ 14:15 UK TZ 8 thread virtual machine (important, must be multiple CPU threads to trigger the regression) 20GB virtio drive on /dev/vdb, 1 partition /dev/vdb1 sudo mkfs.ext4 /dev/vdb1 -O ea_inode sudo mount /dev/vdb1 /mnt git clone https://github.com/ColinIanKing/stress-ng cd stress-ng make clean; make -j $(nproc) ..wait a couple of minutes, you will see that the number of running processes is not 8 as expected (from the --vmstat output of stress-ng) cannot ^C stop stress-ng because of a kernel lockup, use another tty and check dmesg, I get the following: [ 247.028846] INFO: task jbd2/vdb1-8:1548 blocked for more than 122 seconds. [ 247.030830] Not tainted 6.11.0-7-generic #7-Ubuntu [ 247.032667] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 247.034170] task:jbd2/vdb1-8 state:D stack:0 pid:1548 tgid:1548 ppid:2 flags:0x00004000 [ 247.034176] Call Trace: [ 247.034178] <TASK> [ 247.034182] __schedule+0x277/0x6c0 [ 247.034199] schedule+0x29/0xd0 [ 247.034203] jbd2_journal_wait_updates+0x77/0xf0 [ 247.034207] ? __pfx_autoremove_wake_function+0x10/0x10 [ 247.034213] jbd2_journal_commit_transaction+0x290/0x1a10 [ 247.034223] kjournald2+0xa8/0x250 [ 247.034228] ? __pfx_autoremove_wake_function+0x10/0x10 [ 247.034233] ? __pfx_kjournald2+0x10/0x10 [ 247.034236] kthread+0xe1/0x110 [ 247.034241] ? __pfx_kthread+0x10/0x10 [ 247.034244] ret_from_fork+0x44/0x70 [ 247.034247] ? __pfx_kthread+0x10/0x10 [ 247.034251] ret_from_fork_asm+0x1a/0x30 [ 247.034257] </TASK> NOTE: this works fine for Limux 6.8.0-31, so this looks like a regression for 6.11.0-7 Attached is the full kernel log. ** Affects: linux (Ubuntu) Importance: High Status: New ** Attachment added: "kernel log" https://bugs.launchpad.net/bugs/2080853/+attachment/5817945/+files/kern.log ** Description changed: How to reproduce this issue: Kernel: 6.11.0-7, AMD64 virtual machine, oracular, updated 16th Sept 2024 @ 14:15 UK TZ 8 thread virtual machine (important, must be multiple CPU threads to trigger the regression) 20GB virtio drive on /dev/vdb, 1 partition /dev/vdb1 sudo mkfs.ext4 /dev/vdb1 -O ea_inode sudo mount /dev/vdb1 /mnt git clone https://github.com/ColinIanKing/stress-ng cd stress-ng make clean; make -j $(nproc) - sudo ./stress-ng --xattr 8 -t 120 --vmstat 1 ..wait a couple of minutes, you will see that the number of running processes is not 8 as expected (from the --vmstat output of stress-ng) cannot ^C stop stress-ng because of a kernel lockup, use another tty and check dmesg, I get the following: [ 247.028846] INFO: task jbd2/vdb1-8:1548 blocked for more than 122 seconds. [ 247.030830] Not tainted 6.11.0-7-generic #7-Ubuntu [ 247.032667] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 247.034170] task:jbd2/vdb1-8 state:D stack:0 pid:1548 tgid:1548 ppid:2 flags:0x00004000 [ 247.034176] Call Trace: [ 247.034178] <TASK> [ 247.034182] __schedule+0x277/0x6c0 [ 247.034199] schedule+0x29/0xd0 [ 247.034203] jbd2_journal_wait_updates+0x77/0xf0 [ 247.034207] ? __pfx_autoremove_wake_function+0x10/0x10 [ 247.034213] jbd2_journal_commit_transaction+0x290/0x1a10 [ 247.034223] kjournald2+0xa8/0x250 [ 247.034228] ? __pfx_autoremove_wake_function+0x10/0x10 [ 247.034233] ? __pfx_kjournald2+0x10/0x10 [ 247.034236] kthread+0xe1/0x110 [ 247.034241] ? __pfx_kthread+0x10/0x10 [ 247.034244] ret_from_fork+0x44/0x70 [ 247.034247] ? __pfx_kthread+0x10/0x10 [ 247.034251] ret_from_fork_asm+0x1a/0x30 [ 247.034257] </TASK> - - NOTE: this works fine for Limux 6.8.0-31, so this looks like a regression for 6.11.0-7 + NOTE: this works fine for Limux 6.8.0-31, so this looks like a + regression for 6.11.0-7 Attached is the full kernel log. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2080853 Title: oracular 6.11 kernel regression with ext4 and ea_inode mount flags and exercising xattrs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2080853/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
