Hello, On Tue, Mar 31, 2020 at 11:47:41PM +0800, Weiping Zhang wrote: > Do you means drop the "io.wrr" or "blkio.wrr" in cgroup, and use a > dedicated interface > like /dev/xxx or /proc/xxx? Yes, something along that line. Given that it's nvme specific, it'd be best if the interface reflects that too - e.g. through a file under /sys/block/nvme*/device/. Jens, Christoph, what do you guys think? > I see the perf code: > struct fd f = fdget(fd) > struct cgroup_subsys_state *css = > css_tryget_online_from_dir(f.file->f_path.dentry, > &perf_event_cgrp_subsys); > > Looks can be applied to block cgroup in same way. Yeah, either fd or ino can be used to identify a cgroup. Thanks. -- tejun
