Kernel 6.8.0-79-generic in this case.. I think rsync may trigger this (probably mass update of atimes on the files?), I had been running an rsync backup on it when I logged in and saw like 600% CPU usage from these workers just churning through CPU time for several minutes. I do have a script that will display Dirty and Writeback from /proc/meminfo and it had like less than 2MB dirty, the "wbs" in this case did not have some huge amount of writebacks going on.
[40673.756842] workqueue: inode_switch_wbs_work_fn hogged CPU for >10000us 4 times, conside r switching to WQ_UNBOUND [40673.827870] workqueue: inode_switch_wbs_work_fn hogged CPU for >10000us 8 times, conside r switching to WQ_UNBOUND [40673.881887] workqueue: inode_switch_wbs_work_fn hogged CPU for >10000us 16 times, consid er switching to WQ_UNBOUND [40674.034833] workqueue: inode_switch_wbs_work_fn hogged CPU for >10000us 32 times, consid er switching to WQ_UNBOUND [40674.694056] workqueue: inode_switch_wbs_work_fn hogged CPU for >10000us 64 times, consider switching to WQ_UNBOUND [40678.956775] workqueue: inode_switch_wbs_work_fn hogged CPU for >10000us 128 times, consider switching to WQ_UNBOUND [40684.067714] workqueue: inode_switch_wbs_work_fn hogged CPU for >10000us 256 times, consider switching to WQ_UNBOUND [40694.227596] workqueue: inode_switch_wbs_work_fn hogged CPU for >10000us 512 times, consider switching to WQ_UNBOUND [40763.993648] workqueue: inode_switch_wbs_work_fn hogged CPU for >10000us 1024 times, consider switching to WQ_UNBOUND [41021.791329] kauditd_printk_skb: 125 callbacks suppressed This does seem intermittent, and this thing's a 6 core/12 thread, so I doubt it's noticeably slowing down the system. But definitely odd. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2038492 Title: workqueue: inode_switch_wbs_work_fn hogged CPU for >10000us 16 times, consider switching to WQ_UNBOUND To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2038492/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
