** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: linux-aws (Ubuntu)
** No longer affects: linux-azure (Ubuntu)
** No longer affects: linux-gcp (Ubuntu)
** Also affects: linux (Ubuntu Kinetic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Mantic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2016186
Title:
5.19 not reporting cgroups v1 blkio.throttle.io_serviced
Status in linux package in Ubuntu:
New
Status in linux source package in Kinetic:
New
Status in linux source package in Lunar:
New
Status in linux source package in Mantic:
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.
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