My system has been a bit slow for the last couple of days, and then checked the cpu usage and saw that Xorg was using one core constantly, and systemd-journal was also using basically one core. I then checked journalctl, and the log was flooded with kernel messages (I even had messages from systemd-journald that it was missing thousand of messages per second). This is an exerpt:
sep 09 13:31:35 carl-e14 kernel: FS: 00007f9d388f26c0(0000) GS:ffff8cd3ff800000(0000) knlGS:0000000000>
sep 09 13:31:35 carl-e14 systemd-journald[313]: Missed 2259 kernel messages
sep 09 13:31:35 carl-e14 kernel: __x64_sys_ioctl+0x98/0xe0
sep 09 13:31:35 carl-e14 kernel: do_syscall_64+0x5c/0x90
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: entry_SYSCALL_64_after_hwframe+0x62/0xcc
sep 09 13:31:35 carl-e14 kernel: RIP: 0033:0x7fc1dcdf09df
sep 09 13:31:35 carl-e14 kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 8>
sep 09 13:31:35 carl-e14 kernel: RSP: 002b:00007fc1b6efea30 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
sep 09 13:31:35 carl-e14 kernel: RAX: ffffffffffffffda RBX: 00007fc1b6efebc8 RCX: 00007fc1dcdf09df
sep 09 13:31:35 carl-e14 kernel: RDX: 00007fc1b6efeaf0 RSI: 00000000c0186444 RDI: 000000000000002b
sep 09 13:31:35 carl-e14 kernel: RBP: 00007fc1b6efeaf0 R08: 00007fc1b6efec30 R09: 00007fc1b6efead0
sep 09 13:31:35 carl-e14 kernel: R10: 00007fc1c0f19f00 R11: 0000000000000246 R12: 00000000c0186444
sep 09 13:31:35 carl-e14 kernel: R13: 000000000000002b R14: 0000000000000003 R15: 00007fc1b6efebc8
sep 09 13:31:35 carl-e14 kernel: </TASK>
sep 09 13:31:35 carl-e14 kernel: ---[ end trace c28bc65766e63f19 ]---
sep 09 13:31:35 carl-e14 kernel: ? amdgpu_cs_find_mapping+0x110/0x110 [amdgpu 59bb2b54778d3125c1b153c1>
sep 09 13:31:35 carl-e14 kernel: ------------[ cut here ]------------
sep 09 13:31:35 carl-e14 kernel: amdgpu_drm_ioctl+0x4a/0x90 [amdgpu 59bb2b54778d3125c1b153c1a01f9a8546>
sep 09 13:31:35 carl-e14 kernel: WARNING: CPU: 1 PID: 3829 at include/linux/dma-fence.h:478 amdgpu_sync>
sep 09 13:31:35 carl-e14 kernel: __x64_sys_ioctl+0x98/0xe0
sep 09 13:31:35 carl-e14 kernel: do_syscall_64+0x5c/0x90
sep 09 13:31:35 carl-e14 kernel: ? syscall_exit_to_user_mode+0x31/0x50
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? syscall_exit_to_user_mode+0x31/0x50
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? syscall_exit_to_user_mode+0x31/0x50
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: Modules linked in: btrfs
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: blake2b_generic xor raid6_pq
sep 09 13:31:35 carl-e14 kernel: entry_SYSCALL_64_after_hwframe+0x62/0xcc
sep 09 13:31:35 carl-e14 kernel: ufs hfsplus
sep 09 13:31:35 carl-e14 kernel: RIP: 0033:0x7f9d4566f9df
sep 09 13:31:35 carl-e14 kernel: hfs cdrom minix
sep 09 13:31:35 carl-e14 kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 8>
sep 09 13:31:35 carl-e14 kernel: msdos jfs xfs
sep 09 13:31:35 carl-e14 kernel: RSP: 002b:00007f9d388f18c0 EFLAGS: 00000246
sep 09 13:31:35 carl-e14 kernel: libcrc32c rfcomm
sep 09 13:31:35 carl-e14 kernel: ORIG_RAX: 0000000000000010
sep 09 13:31:35 carl-e14 kernel: ccm
sep 09 13:31:35 carl-e14 kernel: RAX: ffffffffffffffda RBX: 00007f9d388f1a58 RCX: 00007f9d4566f9df
sep 09 13:31:35 carl-e14 kernel: qrtr joydev
lines 1-47...skipping...
sep 09 13:31:35 carl-e14 kernel: FS: 00007f9d388f26c0(0000) GS:ffff8cd3ff800000(0000) knlGS:0000000000000000
sep 09 13:31:35 carl-e14 systemd-journald[313]: Missed 2259 kernel messages
sep 09 13:31:35 carl-e14 kernel: __x64_sys_ioctl+0x98/0xe0
sep 09 13:31:35 carl-e14 kernel: do_syscall_64+0x5c/0x90
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: entry_SYSCALL_64_after_hwframe+0x62/0xcc
sep 09 13:31:35 carl-e14 kernel: RIP: 0033:0x7fc1dcdf09df
sep 09 13:31:35 carl-e14 kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 18 48 8b 44 24 18 64 >
sep 09 13:31:35 carl-e14 kernel: RSP: 002b:00007fc1b6efea30 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
sep 09 13:31:35 carl-e14 kernel: RAX: ffffffffffffffda RBX: 00007fc1b6efebc8 RCX: 00007fc1dcdf09df
sep 09 13:31:35 carl-e14 kernel: RDX: 00007fc1b6efeaf0 RSI: 00000000c0186444 RDI: 000000000000002b
sep 09 13:31:35 carl-e14 kernel: RBP: 00007fc1b6efeaf0 R08: 00007fc1b6efec30 R09: 00007fc1b6efead0
sep 09 13:31:35 carl-e14 kernel: R10: 00007fc1c0f19f00 R11: 0000000000000246 R12: 00000000c0186444
sep 09 13:31:35 carl-e14 kernel: R13: 000000000000002b R14: 0000000000000003 R15: 00007fc1b6efebc8
sep 09 13:31:35 carl-e14 kernel: </TASK>
sep 09 13:31:35 carl-e14 kernel: ---[ end trace c28bc65766e63f19 ]---
sep 09 13:31:35 carl-e14 kernel: ? amdgpu_cs_find_mapping+0x110/0x110 [amdgpu 59bb2b54778d3125c1b153c1a01f9a8546f99263]
sep 09 13:31:35 carl-e14 kernel: ------------[ cut here ]------------
sep 09 13:31:35 carl-e14 kernel: amdgpu_drm_ioctl+0x4a/0x90 [amdgpu 59bb2b54778d3125c1b153c1a01f9a8546f99263]
sep 09 13:31:35 carl-e14 kernel: WARNING: CPU: 1 PID: 3829 at include/linux/dma-fence.h:478 amdgpu_sync_keep_later+0x80/0xc0 [amdgpu]
sep 09 13:31:35 carl-e14 kernel: __x64_sys_ioctl+0x98/0xe0
sep 09 13:31:35 carl-e14 kernel: do_syscall_64+0x5c/0x90
sep 09 13:31:35 carl-e14 kernel: ? syscall_exit_to_user_mode+0x31/0x50
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? syscall_exit_to_user_mode+0x31/0x50
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? syscall_exit_to_user_mode+0x31/0x50
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: Modules linked in: btrfs
sep 09 13:31:35 carl-e14 kernel: ? do_syscall_64+0x68/0x90
sep 09 13:31:35 carl-e14 kernel: blake2b_generic xor raid6_pq
sep 09 13:31:35 carl-e14 kernel: entry_SYSCALL_64_after_hwframe+0x62/0xcc
sep 09 13:31:35 carl-e14 kernel: ufs hfsplus
sep 09 13:31:35 carl-e14 kernel: RIP: 0033:0x7f9d4566f9df
sep 09 13:31:35 carl-e14 kernel: hfs cdrom minix
sep 09 13:31:35 carl-e14 kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 18 48 8b 44 24 18 64 >
sep 09 13:31:35 carl-e14 kernel: msdos jfs xfs
sep 09 13:31:35 carl-e14 kernel: RSP: 002b:00007f9d388f18c0 EFLAGS: 00000246
sep 09 13:31:35 carl-e14 kernel: libcrc32c rfcomm
sep 09 13:31:35 carl-e14 kernel: ORIG_RAX: 0000000000000010
sep 09 13:31:35 carl-e14 kernel: ccm
sep 09 13:31:35 carl-e14 kernel: RAX: ffffffffffffffda RBX: 00007f9d388f1a58 RCX: 00007f9d4566f9df
sep 09 13:31:35 carl-e14 kernel: qrtr joydev
sep 09 13:31:35 carl-e14 kernel: RDX: 00007f9d388f1980 RSI: 00000000c0186444 RDI: 0000000000000010
sep 09 13:31:35 carl-e14 kernel: mousedev
I then upgraded the kernel from 5.15.128-1 to 6.1.49-1, which seemed to resolve the issue (both Xorg and systemd-journal are back at normal cpu loads and the kernel is no longer flooding the log with messages).
Does anyone know what’s going on?