Hi, On 14-05-2021 05:04, Theodore Ts'o wrote: > On Thu, May 13, 2021 at 04:38:18PM -0400, Nicholas D Steeves wrote: >>> >>> On 17-04-2021 00:35, Nicholas D Steeves wrote: >>>> Last I checked, only btrfs supports the cgroupv2 I/O controller; this >>>> should probably be documented. Alternatively, if more than btrfs (ie: >>>> XFS and ext4) supports it, but not other file systems (ie: f2fs, >>>> reiser4, jfs, etc) than this should be documented. > > There are two things which are being confused here. Once is whether > you are using cgroup v1 versus cgroup v2, and the other thing is which > i/o related cgroup controller are you using. [...] Theodore, thanks for the extensive reply, I hope it helped Nicholas and I learned a bit from it. However, I'm very unsure what to do with all this (high quality) information as it seems not really in scope to talk about in the release notes and if it is, it's way too long. @Nicholas, I suggest you turn this bug into a Wiki page (assuming Theodore is fine with that) or something like that to expose this information to a broader audience. If after doing that, you still think there's something relevant to mention in the release notes, we'd have a place to point at for more background information and can keep the release note short. In that case, similar to your other bug report about cgroups, I'd appreciate a (draft) proposal for text to include. Paul
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