Re: [PATCH] perf stat: Support old kernels for bperf cgroup counting

Namhyung Kim
2022-10-11T05:24:17Z

Hi Tejun,

On Mon, Oct 10, 2022 at 4:59 PM Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
>
> On Wed, Sep 21, 2022 at 09:14:35PM -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.
> >
> > Signed-off-by: Namhyung Kim <namhyung-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>
> Looks like it's acked enough but the patch doesn't apply anymore. Namhyung,
> can you please refresh the patch? I'll route this through
> cgroup/for-6.1-fixes unless somebody objects.

Sorry about the conflict. There was another change to get the perf
cgroup subsys id properly. Will send v2 soon.

Thanks,
Namhyung