linux-kernel - Re: [PATCH v2] perf bpf-filter: Improve error messages

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Message-Id: <174958073883.4039944.15365887459982691266.b4-ty@kernel.org>
Date: Tue, 10 Jun 2025 11:38:58 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Ian Rogers <irogers@...gle.com>, Kan Liang <kan.liang@...ux.intel.com>, 
 Namhyung Kim <namhyung@...nel.org>
Cc: Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, 
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, 
 LKML <linux-kernel@...r.kernel.org>, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v2] perf bpf-filter: Improve error messages

On Wed, 04 Jun 2025 10:48:35 -0700, Namhyung Kim wrote:
> The BPF filter needs libbpf/BPF-skeleton support and root privilege.
> Add error messages to help users understand the problem easily.
> 
> When it's not build with BPF support (make BUILD_BPF_SKEL=0).
> 
>   $ sudo perf record -e cycles --filter "pid != 0" true
>   Error: BPF filter is requested but perf is not built with BPF.
>   	Please make sure to build with libbpf and BPF skeleton.
> 
> [...]
Applied to perf-tools-next, thanks!

Best regards,
Namhyung