lkml.org 
[lkml]   [2022]   [Oct]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2] perf stat: Support old kernels for bperf cgroup counting
Em Tue, Oct 11, 2022 at 06:53:43AM -1000, Tejun Heo escreveu:
> On Mon, Oct 10, 2022 at 10:28:08PM -0700, Namhyung Kim wrote:
> > The recent change in the cgroup will break the backward compatiblity in
> > the BPF program. It should support both old and new kernels using BPF
> > CO-RE technique.

> > Like the task_struct->__state handling in the offcpu analysis, we can
> > check the field name in the cgroup struct.

> > Acked-by: Jiri Olsa <jolsa@kernel.org>
> > Acked-by: Andrii Nakryiko <andrii@kernel.org>
> > Signed-off-by: Namhyung Kim <namhyung@kernel.org>

> Applied to cgroup/for-6.1-fixes.

Hey, I noticed that the perf build is broken for the
tools/perf/util/bpf_skel/bperf_cgroup.bpf.c skell, so I tried using b4
on this Namhyung patch, it ended up getting a newer version, by Tejun,
that mixes up kernel code and tooling, which, when I tried to apply
upstream didn't work.

Please try not to mix up kernel and tools/ changes in the same patch to
avoid these issues.

Also when changing tools/perf, please CC me.

I'm now back trying to apply v2 of this patch to see if it fixes my
build.

Thanks,

- Arnaldo

\
 
 \ /
  Last update: 2022-10-14 15:28    [W:0.429 / U:1.420 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site