linux-kernel - [LSF/MM/BPF TOPIC] ls+cat based debugging for BPF

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Message-ID: <A8AB5F56-7233-40AD-9C49-2348B708557B@fb.com>
Date:   Fri, 24 Jan 2020 21:25:22 +0000
From:   Song Liu <songliubraving@...com>
To:     "lsf-pc@...ts.linux-foundation.org" 
        <lsf-pc@...ts.linux-foundation.org>, bpf <bpf@...r.kernel.org>
CC:     linux-kernel <linux-kernel@...r.kernel.org>
Subject: [LSF/MM/BPF TOPIC] ls+cat based debugging for BPF 

ls+cat based debugging for BPF
================================

Currently, users monitor/debug BPF programs and maps via sys_bpf(). This
approach is different to the habit of some system admins, who do these
works via ls+cat in sysfs. In this LSF/MM/BPF, we would like to discuss
whether/how to enable similar debugging interface for BPF programs and 
maps. Specifically, we can discuss:

  1) What inforamtions to show in sysfs/bpffs;
  2) Granularity to enable/disable these information;
  3) Will there be any overhead? If so, how much overhead is acceptable.

These discussions should save us a lot of time over emails. 

I will share a prototype of this before LSF/MM/BPF.

Thanks,
Song