From: Tejun Heo <tj@kernel.org>
To: Ziyang Men <ziyang.meme@gmail.com>
Cc: kernel-team@meta.com, "Jens Axboe" <axboe@kernel.dk>,
"Josef Bacik" <josef@toxicpanda.com>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Eduard Zingerman" <eddyz87@gmail.com>,
"Kumar Kartikeya Dwivedi" <memxor@gmail.com>,
"Martin KaFai Lau" <martin.lau@linux.dev>,
"Song Liu" <song@kernel.org>,
"Yonghong Song" <yonghong.song@linux.dev>,
"Jiri Olsa" <jolsa@kernel.org>,
"Emil Tsalapatis" <emil@etsalapatis.com>,
"Shuah Khan" <shuah@kernel.org>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Michal Koutný" <mkoutny@suse.com>,
"Roman Gushchin" <roman.gushchin@linux.dev>,
"Shakeel Butt" <shakeel.butt@linux.dev>,
"JP Kobryn" <inwardvessel@gmail.com>,
"Mykola Lysenko" <mykolal@meta.com>,
linux-block@vger.kernel.org, bpf@vger.kernel.org,
cgroups@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] block: add BPF kfuncs to read blkcg io.stat
Date: Tue, 18 Aug 2026 07:21:37 -1000 [thread overview]
Message-ID: <aoSUob1s8WBQ3buO@slm.duckdns.org> (raw)
In-Reply-To: <20260817214205.723267-2-ziyang.meme@gmail.com>
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
next prev parent reply other threads:[~2026-08-18 17:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-17 21:42 [PATCH v2 0/2] block: expose blkcg io.stat to BPF Ziyang Men
2026-08-17 21:42 ` [PATCH v2 1/2] block: add BPF kfuncs to read blkcg io.stat Ziyang Men
2026-08-17 22:28 ` bot+bpf-ci
2026-08-18 17:21 ` Tejun Heo [this message]
2026-08-18 22:31 ` Ziyang Men
2026-08-18 22:42 ` Tejun Heo
2026-08-18 23:01 ` Ziyang Men
2026-08-17 21:42 ` [PATCH v2 2/2] selftests/bpf: add test for blkcg io.stat BPF kfuncs Ziyang Men
2026-08-17 22:41 ` bot+bpf-ci
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