Re: [PATCH v2 1/2] block: add BPF kfuncs to read blkcg io.stat

[Tejun Heo]

Hello,

On Mon, Aug 17, 2026 at 02:42:04PM -0700, Ziyang Men wrote:
> +/**
> + * bpf_blkcg_flush_stats - Flush a block cgroup's io statistics
> + * @cgrp: cgroup to flush
> + *
> + * Propagate I/O statistics up the cgroup tree. Root statistics come from
> + * block devices and include all cgroups' I/O.
> + */
> +__bpf_kfunc void bpf_blkcg_flush_stats(struct cgroup *cgrp)

Either @css or @blkcg, probably the latter so that each operation doesn't
have to verify subsys again. I'd make this and the cpu ppatches into a
single series. Add blkcg cast there too.

Thanks.

-- 
tejun