Potential upstream fix: https://lore.kernel.org/lkml/20230401094708.77631-1-hanjinke....@bytedance.com/
However this seems to partially restore the old behavior of cgroup v1, because we still need to set io throttling limits in order to get the io statistics. We may need an additional fix like this to completely restore the old behavior: https://lore.kernel.org/lkml/ZEwY5Oo+5inO9UFf@righiandr- XPS-13-7390/ I'll follow the upstream thread, if we come up with a reasonable fix I'll take care of preparing a proper SRU for it. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-aws in Ubuntu. https://bugs.launchpad.net/bugs/2016186 Title: 5.19 not reporting cgroups v1 blkio.throttle.io_serviced Status in linux-aws package in Ubuntu: New Status in linux-azure package in Ubuntu: New Status in linux-gcp package in Ubuntu: New Bug description: Hi, I'm still investigating but, am a bit stuck. Here's what I've found so far. Today I've upgraded some nodes in AWS EC2 from the previous v5.15 linux-aws package to the recently pusblished v5.19 package and rebooted. It seems that even when there's disk activity, the files: /sys/fs/cgroup/blkio/blkio.throttle.io_serviced /sys/fs/cgroup/blkio/blkio.throttle.io_service_bytes Are only ever populated with 0's. Prior on v5.15 these would reflect the actual disk usage. No other system configuration changes were applied just the kernel upgrade and reboot. I've also verified that simply rebooting a v5.15 where this does work doesn't break the reporting. These EC2 instances are running with cgroups v1 due to other compatability issues and I suspect that might be the issue. So far, I cannot find any differences. mtab shows the same v1 mount setup, the kernel options match betwen v5.15 and v5.19. I'm more than happy to fetch whatever info would help out here. I'd love to get 5.19 working for us but, we really need the data from these files. Info: Prior version that works: Linux ip-10-128-168-154 5.15.0-1031-aws #35-Ubuntu SMP Fri Feb 10 02:07:18 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux Upgraded version that's broken: Linux ip-10-128-166-219 5.19.0-1022-aws #23~22.04.1-Ubuntu SMP Fri Mar 17 15:38:24 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux EC2 instances built off of the published 22.04 LTS AMI in us-east-1. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-aws/+bug/2016186/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
