Hi I've got a question: The cgroups-v1 documentation doesn't mention anymore the status of recording blkio.io_serviced and blkio.io_service_bytes stats when files are written without the O_DIRECT flag within a subgroup. With cgroups v2 it can be accurately recorded if the filesystem supports it. What is the status in cgroups v1? I assume it has not changed and it can't keep the stats because there is no communication with the memory controller. Or have the improvements made in cgroups v2 ported to cgroups v1? Background: [1] added documentation on limitations of blkio stats collection in cgroups v1. [2] refactored the documentation and I think mistakenly deleted too much. Thanks Timo Haas [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/Documentation/cgroups/blkio-controller.txt?h=v4.14-rc4&id=3e1534cf4a2a8278e811e7c84a79da1a02347b8b [2] https://git.kernel.org/pub//scm/linux/kernel/git/torvalds/linux.git/commit/?id=6c2920926b10e8303378408e3c2b8952071d4344
