Hello, On Tue, Jan 11, 2022 at 03:38:20PM -0800, Josh Don wrote: > Is the concern there just the extra overhead from making multiple > trips into this handler and re-allocating the buffer until it is large > enough to take all the output? In that case, we could pre-allocate > with a size of the right order of magnitude, similar to /proc/stat. > > Lack of per-cpu stats is a gap between cgroup v1 and v2, for which v2 > can easily support this interface given that it already tracks the > stats percpu internally. I opted to dump them all in a single file > here, to match the consolidation that occurred from cpuacct->cpu.stat. Yeah, nack on this. That part was dropped intentionally. These text pseudo files aren't a great medium for this sort of (potentially large) data dump and they scale really badly with new fields which we may want to expose in the future. For detailed introspection, a better route would be using bpf and if that's inconvenient for some reason trying to make them more convenient. Thanks. -- tejun
