Ubuntu
linux package

  1. Bug #2016186
  2. Comment #0

Comment 0 for bug 2016186

Revision history for this message
Jared Ledvina (Datadog) (jaredledvina-dd) wrote :

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.